CN103909660B - A kind of method of stitching/resin film infusion moulding resin based composites - Google Patents

Abstract

The invention belongs to polymer matrix composites Liquid molding techniques, the method relating to a kind of Novel suture/resin film infusion moulding resin based composites。Fabric laying interlayer in the non-seam area of fiber reinforced preform places resin molding, and resin molding is placed on seam area top。The present invention changes single resin molding modes of emplacement in conventional resins membrane permeation forming process, seam area for suture texture adopts different resin molding modes of emplacements with non-seam area, the needs of seam area sewing process can be met, it is easy to again the flowing of RFI process resin control, be conducive to labyrinth stitching/RFI molding, the RFI molding of more structure open structure of even right and wrong can be realized, improve technology stability, adapt to the needs that through engineering approaches produces。

Description

A kind of method of stitching/resin film infusion moulding resin based composites

Technical field

The invention belongs to manufacture technology of composite material field, relate to a kind of stitching/resin film infusion and the method for RFI (ResinFilmInfusion is called for short RFI) moulding resin based composites。

Background technology

Advanced composite material has one of advantage main materials having become present generation aircraft structure such as specific strength, specific stiffness height and designability because of it。But along with the continuous expansion of composite consumption, the weakness that interlayer performance is weak, manufacturing cost is high is more aobvious prominent, limits the application of composite to a certain extent。Composite three dimensional enhancement techniques and respective liquid forming technique are all being studied by the domestic and international Duo Jia research institution of interlayer performance in order to improve composite in recent years。RFI (ResinFilmInfusion) i.e. resin film infusion forming technique is that at present both at home and abroad field of compound material is advocated and one of the important technology that develops energetically, RFI technique is as a kind of liquid molding method, can be combined with the process meanses such as stitching, braiding and realize the enhancing in thickness of composite material direction, reduce quantity and the assembly work amount of securing member while improving structural intergrity, reduce the manufacturing cost of composite。

The method of existing stitching/resin film infusion moulding resin based composites, it is adopt suturing skill first fiber and steel bar reinforced, the eyelid covering of dry state etc. that laying is good being required, the region sewed up carries out stitching and prepares into stitching preform, laying area and thickness etc. according to institute's forming part, calculate the total amount of resin needed for wall panel skin and reinforcement, assemble paving with mould and cover resin molding, in temperature-rise period, resin melting penetrates into whole preform, then curing molding。

Existing resin film infusion method, due to the unified bottom being totally placed in whole preform of the resin needed for part, resin penetration process is relatively larger by the impact of preform each several part permeability and structural agent, and adopt the composite of suturing skill to be generally baroque Material Stiffened Panel class formation, seam area and non-seam area fiber preform body permeability are also inconsistent, resin flow channel complicated design, it is easy to because resin in eyelid covering, reinforcement region and stitching, non-seam area resin penetration speed is inconsistent causes infiltration not exclusively。

Along with the increase of composite consumption, increasing aircaft configuration needs to adopt stitching/RFI technique to carry out global formation, and structural behaviour it is also proposed higher requirement。Except generally seen Material Stiffened Panel structure, many aeroplane structure design become the non-open wall panel structure of shape for hat reinforcement；Certain technique for aircraft composite component is in order to improve structure impact resistance, it is desirable to material is carried out interlayer toughened, in order to improve the boundary strength in reinforcement region and eyelid covering, requires to adopt suturing skill simultaneously, then passes through RFI technique and component is carried out global formation。For Aircraft Composite Structure stitching/increasing demand of RFI technology to high-performance and low-cost, it is necessary to improve tradition stitchings/RFI technology, break technique limitation, it is achieved the molding of more structures, and improve technology stability, adapt to the needs of through engineering approaches production。

Summary of the invention

It is an object of the invention to: a kind of RFI forming method that can be applicable to suture texture is provided, make the composite integral shaping method of this high-performance and low-cost of RFI can be applied to Stitched Composites structure with higher quality and technology stability。

The technical solution of the present invention is:

According to eyelid covering class and reinforcement class, part is divided laying unit, and each laying unit carries out subregion by stitching, non-seam area；The fibre density adopted according to the requirement of part fiber volume fraction, the fabric side density adopted, fabric and matrix resin density, calculate the resin molding surface density that woven is corresponding；Regulation coefficient is calculated according to the full laying number of plies of laying unit；The resin molding surface density corresponding by woven and regulation coefficient, calculate the resin molding surface density that laying unit is actually needed, by resin Preparation resin film；Resin molding is by the non-seam area measure of laying unit, in laying unit preform lay-up process, resin molding is successively laid in the interlayer of the laying non-seam area of unit fabric, laying unit preform is prepared together with laying unit fabric, then, by designing requirement laying unit preform it is assembled into part preform in seam area and sews up；Calculate part preform seam area according to the resin molding surface density that part preform seam area fabric area, woven are corresponding and need the amount of resin molding；Part preform assembles with mould, places resin molding, carries out resin transfer and solidification after encapsulation。Its processing step is:

(a). part is divided laying unit according to eyelid covering class and reinforcement class, and each laying unit is carried out subregion by stitching, non-seam area。

Wherein, the monolateral shift outward 0～15mm of seam area of eyelid covering class laying unit, remainder is non-seam area；The seam area of reinforcement class laying unit be the inward flange of reinforcement class laying unit to the outer peripheral region of flange, inward flange offsets up 0～10mm according to the tangent position at the R angle between flange and web, and all the other are non-seam area。

(b). the fibre density adopted according to part fiber volume fraction, the fabric side density adopted, fabric and the surface density of matrix resin density calculation woven correspondence resin molding, it is accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SFabric side density, g/m²；

ρ_fThe fibre density that fabric adopts, g/cm³；

ρ_RMatrix resin density, g/cm³；

V_fPart fiber volume fraction, %

W_R0-woven correspondence resin molding surface density, g/m²；

Formulation process is as follows:

$\frac{W_S}{{\mathrm{\ρ}}_f}$

Fabric side density draws the volume of unit are woven divided by fibre density

$\frac{(1-V_f)\·W_S}{V_f\·{\mathrm{\ρ}}_f}$

The volume of unit are woven is multiplied by resin volume content (1-V again divided by part fiber volume fraction_f) calculate the volume of resin needed for unit are woven

$\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$

Needed for unit are woven, the volume of resin is multiplied by resin density and draws woven correspondence resin molding surface density, because of ρ in formula_RWith ρ_fUnit is consistent, V_fWith (1-V_f) unit is consistent, so woven correspondence resin molding surface density W_R0Unit and W_SUnanimously。

(c). according to the full laying fabric layers of laying unit, calculate the resin molding number of plies needed for the full laying fabric of each laying unit, because during laying unit preform laying, laying unit outermost fabric need not laying resin molding, therefore laying cell tree adipose membrane number of plies N_RiRatio fabric layers N_fiFew one layer, namely

N_Ri=N_fi-1………………………②

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit, layer；

N_RiThe number of plies of resin molding, layer needed for the full laying fabric of part i-th laying unit；

(d). according to the resin molding number of plies needed for laying unit full laying fabric layers and full laying fabric, calculate the regulation coefficient of each laying unit, be accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{(N_{fi}-1)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit；

K_iThe regulation coefficient of part i-th laying unit。

Due to when laying unit preform laying, laying unit outermost fabric does not need laying resin molding, therefore, the laying cell tree adipose membrane number of plies few one layer than fabric layers, cause the resin molding surface density that laying unit is actually needed different from woven corresponding resin molding surface density, more few and calculate gained by woven the resin molding surface density gap of fabric layers is also more big, therefore, in order to accurately calculate resin molding surface density needed for part, need to calculate regulation coefficient according to the full laying number of plies of part, accurately to calculate, by regulation coefficient and woven correspondence resin molding surface density, the resin molding surface density that part is actually needed。

(e). the regulation coefficient of the resin molding surface density corresponding according to woven and each laying unit, calculate the resin molding surface density that each laying unit is actually needed；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, g/m²；

K_iBy the regulation coefficient of the part i-th laying unit that 3. formula calculates；

W_RiThe resin molding surface density that part i-th laying unit is actually needed, g/m²；

(f). require the matrix resin adopted according to Element Design, 4. calculate the resin molding surface density W that gained laying unit is actually needed by formula_RiPrepare resin molding；

(g). by resin molding by the non-seam area measure of laying unit, the resin molding size of the full laying of laying unit is by the non-seam area size of full laying fabric, full laying resin molding number of plies N_RiAccording to the full laying fabric layers N of laying unit_fi2. calculate by formula；

(h). prepared by laying unit preform:

By the laying direction of designing requirement and the order each laying unit preform of laying, by the resin molding successively laying interlayer in the laying non-seam area of unit fabric in lay-up process, make laying unit preform together with fabric。

(i). by designing requirement, laying unit preform is assembled into part preform in seam area, by the technological parameter of designing requirement and position, sews up in part preform seam area；

(j). calculating part preform seam area according to the resin molding surface density that the seam area fabric area of component part preform seam area laying unit, woven are corresponding needs the amount of resin molding；The amount of resin molding calculates by the following method:

If: the seam area of part has n layer fabric, and the seam area area that every layer of fabric is corresponding is S₁～S_n, the surface density of the woven correspondence resin molding 1. calculated by formula is W_R0, the resin molding weight of the required placement of preform seam area is:

G=(S₁+S₂+……+S_n)×W_R0………………………⑤

In formula:

The weight of resin molding, g needed for G preform seam area；

W_R0The surface density of woven correspondence resin molding, g/m²；

S_1～n1～n layer fabric seam area area, m²；

The mode that part preform places resin molding amount in seam area is one of two ways:

The first: selection surface density is W_R0Resin molding, altogether n layer, the area of resin molding is by the respective fabric laying area S in seam area₁～S_n, multiple-layer stacked；

The second: selecting from matrix resin is same resin system, different surface density W_R' resin molding, and by same resin membrane area S place, 6. part preform resin molding number of plies needed for this seam area calculates by formula, is accurate to one decimal place,

$N=\frac{G}{S\·{W_R}^{\′}}$ ………………………⑥

In formula:

Resin molding weight needed for G part preform seam area, g

W_R' select to be positioned over the resin molding surface density of seam area, g/m²；

The resin molding number of plies needed for N preform seam area, layer,

S resin molding area, by the area S of seam area₁～S_nChoose for 0.9～1.1 times of middle maximum；

Place the integer value of N, area is the resin molding of S, and 7. the fractional part numerical value k of N adjusts the area s of resin molding by formula,

S=k S ... ... ... ... ... 7.

Resin molding in the actual placement of seam area is the integer value of N, area is that the resin molding of S adds an aspect and amasss the resin molding into s；

Formulation process is as follows:

S·W_R'

Monolayer area is S, surface density is W_R' the weight of resin molding；

$\frac{G}{S\·{W_R}^{\′}}$

The required resin molding weight placed of seam area is S, surface density divided by monolayer area is W_R' the weight of resin molding be the resin molding number of plies of required placement。

(k). part preform is carried out mould assembling, die location in corresponding seam area, the punching footpath through hole less than φ 2.0mm in advance, resin molding needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip, vacuum film or other air-locked isolated material by resin molding and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

The resin molding surface density that described calculating part is actually needed is accurate to integer-bit。

The described resin molding surface density W being actually needed with calculating gained part_RiPreparing resin molding, its tolerance is ± 5g/m²。

When pawnshop layer unit has intercalation requirement, the non-seam area consistent size of the resin molding size of intercalation and corresponding laying unit intercalation fabric, the intercalation resin molding number of plies is consistent with intercalation fabric layers。

The invention have the advantage that

(1). customize resin molding by woven surface density, be conducive to normal tree adipose membrane specification, be more suitable for through engineering approaches and produce。

(2). resin molding is positioned over non-seam area fabric interlayer in lay-up process, dry state fiber can be played interlayer positioning action, prepared by the preform being more beneficial for realizing labyrinth。

(3). accurately calculate, according to part layering number of plies resin molding surface density corresponding to woven, the resin molding surface density that part is actually needed, be conducive to the accurate control of part resin content。

(4). non-seam area interlayer places resin molding, it is possible to break through the tradition RFI technique restriction to reinforcement height, it is achieved the RFI global formation of arbitrary height Composite Material Stiffened Panel structure。

(5). seam area resin molding is concentrated to be placed with and is beneficial to sewing process enforcement, and seam area individually controls amount of resin, it is to avoid resin penetration process is inconsistent dry spot occurs because permeability contrast causes for seam area and non-seam area, improves technology stability。

(6). it is easy to the flowing of RFI process resin and controls, be more beneficial for labyrinth RFI molding, it may be achieved the RFI molding of the open structure of more structures even right and wrong。

(7). seam area resin molding is positioned over mold outer surface and carries out the mode of resin transfer, it is possible to make piece surface and mould better fit guarantee surface quality of workpieces。

Accompanying drawing explanation

Fig. 1 embodiment 1 shape for hat Material Stiffened Panel typical parts structural representation；

Fig. 2 embodiment 1 shape for hat Material Stiffened Panel typical parts seam area schematic diagram；

The non-seam area of Fig. 3 embodiment 1 shape for hat Material Stiffened Panel typical parts eyelid covering laying unit seam area divides schematic diagram；

The non-seam area of Fig. 4 embodiment 1 shape for hat Material Stiffened Panel typical parts reinforcement laying unit seam area divides schematic diagram；

Fig. 5 embodiment 1 shape for hat Material Stiffened Panel typical parts eyelid covering laying unit lay-up process schematic diagram；

Fig. 6 embodiment 1 shape for hat Material Stiffened Panel typical parts preform seam area resin molding lay mode schematic diagram；

Fig. 7 embodiment 2 shape for hat Material Stiffened Panel structural representation；

Fig. 8 embodiment 2 shape for hat Material Stiffened Panel seam area schematic diagram；

The non-seam area of Fig. 9 embodiment 2 shape for hat Material Stiffened Panel eyelid covering laying unit seam area divides schematic diagram；

The non-seam area of Figure 10 embodiment 2 shape for hat Material Stiffened Panel reinforcement laying unit seam area divides schematic diagram；

Figure 11 embodiment 2 shape for hat Material Stiffened Panel preform seam area resin molding lay mode schematic diagram；

Figure 12 embodiment 3 " J " type Material Stiffened Panel structural representation；

Figure 13 embodiment 3 " J " type Material Stiffened Panel seam area schematic diagram；

The non-seam area of Figure 14 embodiment 3 " J " type Material Stiffened Panel eyelid covering laying unit seam area divides schematic diagram；

Figure 15 embodiment 3 " J " type Material Stiffened Panel preform seam area resin molding lay mode schematic diagram。

Detailed description of the invention:

Below the present invention is described in further details。According to eyelid covering class and reinforcement class, part is divided laying unit, and each laying unit carries out subregion by stitching, non-seam area；The fibre density adopted according to the requirement of part fiber volume fraction, the fabric side density adopted, fabric and matrix resin density, calculate the resin molding surface density that woven is corresponding；Regulation coefficient is calculated according to the full laying number of plies of laying unit；The resin molding surface density corresponding by woven and regulation coefficient, calculate the resin molding surface density that laying unit is actually needed, by resin Preparation resin film；Resin molding is by the non-seam area measure of laying unit, in laying unit preform lay-up process, resin molding is successively laid in the interlayer of the laying non-seam area of unit fabric, laying unit preform is prepared together with laying unit fabric, then, by designing requirement laying unit preform it is assembled into part preform in seam area and sews up；Calculate part preform seam area according to the resin molding surface density that part preform seam area fabric area, woven are corresponding and need the amount of resin molding；Part preform assembles with mould, places resin molding, carries out resin transfer and solidification after encapsulation。Its processing step is:

(a). part is divided laying unit according to eyelid covering class and reinforcement class, and each laying unit is carried out subregion by stitching, non-seam area。

Wherein, the monolateral shift outward 0～15mm of seam area of eyelid covering class laying unit, remainder is non-seam area；The seam area of reinforcement class laying unit be the inward flange of reinforcement class laying unit to the outer peripheral region of flange, inward flange offsets up 0～10mm according to the tangent position at the R angle between flange and web, and all the other are non-seam area。

(b). the fibre density adopted according to part fiber volume fraction, the fabric side density adopted, fabric and the surface density of matrix resin density calculation woven correspondence resin molding, it is accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SFabric side density, g/m²；

ρ_fThe fibre density that fabric adopts, g/cm³；

ρ_RMatrix resin density, g/cm³；

V_fPart fiber volume fraction, %

W_R0-woven correspondence resin molding surface density, g/m²；

Formulation process is as follows:

$\frac{W_S}{{\mathrm{\ρ}}_f}$

Fabric side density draws the volume of unit are woven divided by fibre density

$\frac{(1-V_f)\·W_S}{V_f\·{\mathrm{\ρ}}_f}$

The volume of unit are woven is multiplied by resin volume content (1-V again divided by part fiber volume fraction_f) calculate the volume of resin needed for unit are woven

$\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$

Needed for unit are woven, the volume of resin is multiplied by resin density and draws woven correspondence resin molding surface density, because of ρ in formula_RWith ρ_fUnit is consistent, V_fWith (1-V_f) unit is consistent, so woven correspondence resin molding surface density W_R0Unit and W_SUnanimously。

(c). according to the full laying fabric layers of laying unit, calculate the resin molding number of plies needed for the full laying fabric of each laying unit, because during laying unit preform laying, laying unit outermost fabric need not laying resin molding, therefore laying cell tree adipose membrane number of plies N_RiRatio fabric layers N_fiFew one layer, namely

N_Ri=N_fi-1………………………②

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit, layer；

N_RiThe number of plies of resin molding, layer needed for the full laying fabric of part i-th laying unit；

(d). according to the resin molding number of plies needed for laying unit full laying fabric layers and full laying fabric, calculate the regulation coefficient of each laying unit, be accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{(N_{fi}-1)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit；

K_iThe regulation coefficient of part i-th laying unit。

Due to when laying unit preform laying, laying unit outermost fabric does not need laying resin molding, therefore, the laying cell tree adipose membrane number of plies few one layer than fabric layers, cause the resin molding surface density that laying unit is actually needed different from woven corresponding resin molding surface density, more few and calculate gained by woven the resin molding surface density gap of fabric layers is also more big, therefore, in order to accurately calculate resin molding surface density needed for part, need to calculate regulation coefficient according to the full laying number of plies of part, accurately to calculate, by regulation coefficient and woven correspondence resin molding surface density, the resin molding surface density that part is actually needed。

(e). the regulation coefficient of the resin molding surface density corresponding according to woven and each laying unit, calculate the resin molding surface density that each laying unit is actually needed, be accurate to integer-bit；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, g/m²；

K_iBy the regulation coefficient of the part i-th laying unit that 3. formula calculates；

W_RiThe resin molding surface density that part i-th laying unit is actually needed, g/m²；

(f). require the matrix resin adopted according to Element Design, 4. calculate the resin molding surface density W that gained laying unit is actually needed by formula_RiPreparing resin molding, resin molding surface density tolerance is ± 5g/m²；

(g). by resin molding by the non-seam area measure of laying unit, the resin molding size of the full laying of laying unit is by the non-seam area size of full laying fabric, full laying resin molding number of plies N_RiAccording to the full laying fabric layers N of laying unit_fi2. calculate by formula；

When pawnshop layer unit has intercalation requirement, the non-seam area consistent size of the resin molding size of intercalation and corresponding laying unit intercalation fabric, the intercalation resin molding number of plies is consistent with intercalation fabric layers。

(h). prepared by laying unit preform:

By the laying direction of designing requirement and the order each laying unit preform of laying, by the resin molding successively laying interlayer in the laying non-seam area of unit fabric in lay-up process, make laying unit preform together with fabric。

(i). by designing requirement, laying unit preform is assembled into part preform in seam area, by the technological parameter of designing requirement and position, sews up in part preform seam area；

(j). calculating part preform seam area according to the resin molding surface density that the seam area fabric area of component part preform seam area laying unit, woven are corresponding needs the amount of resin molding；The amount of resin molding calculates by the following method:

If: the seam area of part has n layer fabric, and the seam area area that every layer of fabric is corresponding is S₁～S_n, the surface density of the woven correspondence resin molding 1. calculated by formula is W_R0, the resin molding weight of the required placement of preform seam area is:

G=(S₁+S₂+……+S_n)×W_R0………………………⑤

In formula:

The weight of resin molding, g needed for G preform seam area；

W_R0The surface density of woven correspondence resin molding, g/m²；

S_1～n1～n layer fabric seam area area, m²；

The mode that part preform places resin molding amount in seam area is one of two ways:

The first: selection surface density is W_R0Resin molding, altogether n layer, the area of resin molding is by the respective fabric laying area S in seam area₁～S_n, multiple-layer stacked；

The second: selecting from matrix resin is same resin system, different surface density W_R' resin molding, and by same resin membrane area S place, 6. part preform resin molding number of plies needed for this seam area calculates by formula, is accurate to one decimal place,

$N=\frac{G}{S\·{W_R}^{\′}}$ ………………………⑥

In formula:

Resin molding weight needed for G part preform seam area, g

W_R' select to be positioned over the resin molding surface density of seam area, g/m²；

The resin molding number of plies needed for N preform seam area, layer,

S resin molding area, by the area S of seam area₁～S_nChoose for 0.9～1.1 times of middle maximum；

Place the integer value of N, area is the resin molding of S, and 7. the fractional part numerical value k of N adjusts the area s of resin molding by formula,

S=k S ... ... ... ... ... 7.

Resin molding in the actual placement of seam area is the integer value of N, area is that the resin molding of S adds an aspect and amasss the resin molding into s；

Formulation process is as follows:

S·W_R'

Monolayer area is S, surface density is W_R' the weight of resin molding；

$\frac{G}{S\·{W_R}^{\′}}$

The required resin molding weight placed of seam area is S, surface density divided by monolayer area is W_R' the weight of resin molding be the resin molding number of plies of required placement。

(k). part preform is carried out mould assembling, die location in corresponding seam area, the punching footpath through hole less than φ 2.0mm in advance, resin molding needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip, vacuum film or other air-locked isolated material by resin molding and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

Shape for hat Material Stiffened Panel typical parts shown in embodiment 1: Fig. 1, wallboard overall dimensions 1500mm × 800mm, with 4 shape for hat reinforcements 7 on eyelid covering 6, material adopts U7192/QY9512,24 layers of eyelid covering, reinforcement 16 layers, it is desirable to fiber volume fraction 60%。U7192 carbon fibre fabric surface density is 195g/m², U7192 carbon fibre fabric adopts T700 fibre density 1.81g/cm³, QY9512 resin density 1.24g/cm³。Suturing skill is adopted the flange of shape for hat reinforcement 7 and eyelid covering 6 to be sewed up in Fig. 2 part seam area 8, by RFI technique global formation。Processing step is as follows:

A. analyze the composition of typical parts, be divided into eyelid covering 6 laying unit and reinforcement 7 laying unit。Eyelid covering 6 laying unit and reinforcement 7 laying unit are carried out subregion by stitching, non-seam area respectively, eyelid covering seam area 4 is pressed the monolateral shift outward 5mm of part seam area 8 and is obtained, eyelid covering has 8 seam area 4, each seam area 1120mm × 30mm, remainder is non-seam area 1, as shown in Figure 3；Reinforcement seam area 4 is distributed in shape for hat reinforcement both sides, inward flange is pressed the tangent line of R angle between shape for hat reinforcement web 9 and flange and reinforcement web 9 and is obtained, inward flange is reinforcement seam area 4 to flange outer edge region, every reinforcement has 2 seam area 4, each seam area 1110mm × 35mm, mid portion is non-seam area 1, as shown in Figure 4。

B. require according to part fiber volume fraction, the surface density of the fabric side density that adopts, fibre density that fabric adopts and matrix resin density calculation woven correspondence resin molding, be accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SU7192 fabric side density, 195g/m²；

ρ_fThe T700 carbon fiber density that U7192 fabric adopts, 1.81g/cm³；

ρ_RMatrix resin QY9512 density, 1.24g/cm³

V_fTypical parts fiber volume fraction, 60%

W_R0-woven correspondence resin molding surface density, g/m²；

It follows that

Monolayer U7192 fabric correspondence resin molding surface density W_R0:

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}=\frac{(1-60\%)\×1.24\×195}{60\%\×1.81}=89.1g/m^2$

C. according to the full laying fabric layers of eyelid covering 6 and reinforcement 7 laying unit, resin molding 3 number of plies needed for the calculating full laying fabric of laying unit,

N_Ri=N_fi-1………………………②

Eyelid covering 6 and reinforcement 7 laying unit are full laying, N in formula_fiThe number of plies N of eyelid covering and reinforcement laying unit fabric 2_{F covers}And N_{F muscle}Respectively 24 layers and 16 layers, 2. calculate the number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit by formula_{R covers}And N_{R muscle}:

N_{R covers}=24-1=23 layer

N_{R muscle}=16-1=15 layer

D. according to resin molding 3 number of plies needed for the number of plies of eyelid covering 6 laying unit and reinforcement 7 laying unit full laying fabric 2 and full laying fabric 2, the regulation coefficient K of eyelid covering and reinforcement laying unit is calculated_CoverAnd K_Muscle, it is accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{(N_{fi}-1)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

N in formula_fiThe number of plies of part eyelid covering and the full laying fabric of reinforcement laying unit respectively 24 layers and 16 layers, the regulation coefficient calculating eyelid covering and reinforcement laying unit is respectively as follows:

K_Cover=24/ (24-1)=1.04；

K_Muscle=16/ (16-1)=1.07；

E. according to the resin molding surface density W that woven is corresponding_R0And the regulation coefficient K of eyelid covering 6 and reinforcement 7 laying unit_CoverAnd K_Muscle, calculate the resin molding surface density W that eyelid covering and reinforcement laying unit are actually needed_{R covers}And W_{R muscle}；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, 89.1g/m²；

K_i3. the eyelid covering calculated by formula and the regulation coefficient of reinforcement laying unit respectively 1.04 and 1.07；

Calculate eyelid covering and resin molding surface density W that reinforcement laying unit is actually needed_{R covers}And W_{R muscle}:

W_{R covers}=K_Cover·W_R0=1.04 × 89.1=93g/m²

W_{R muscle}=K_Muscle·W_R0=1.07 × 89.1=95g/m²

F. QY9512 resin is adopted 4. to calculate the resin molding surface density W that gained laying unit is actually needed by formula_{R covers}And W_{R muscle}Prepare resin molding, resin molding surface density tolerance ± 5g/m², it can be deduced that:

Eyelid covering laying cell tree adipose membrane surface density requires at 88～98g/m²In scope；

Reinforcement laying cell tree adipose membrane surface density requires at 90～100g/m²In scope。

Preparation surface density 90～98g/m²Resin molding be simultaneously used for eyelid covering laying unit and reinforcement laying unit。

G. resin molding is pressed eyelid covering and the measure of the non-seam area 1 of reinforcement laying unit, eyelid covering and reinforcement laying unit are full laying, therefore eyelid covering laying cell tree adipose membrane 3 size presses the non-seam area 1 of eyelid covering is equidimension, and resin molding 3 size of the reinforcement laying unit of two kinds of sectional dimensions is respectively by the size of the non-seam area 1 after two kinds of reinforcement laying unit cross sections expansion。

The number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit_{R covers}And N_{R muscle}Respectively N_{R covers}=24-1=23 layer, N_{R muscle}=16-1=15 layer。

H. prepared by laying unit preform:

By the laying direction of designing requirement and order laying eyelid covering and reinforcement laying unit preform respectively, resin molding 3 is successively distinguished the laying interlayer at eyelid covering and the non-seam area 1 of reinforcement laying unit fabric 2 by lay-up process, eyelid covering laying unit preform and reinforcement laying unit preform is made together with fabric 2, for eyelid covering laying unit laying, as shown in Figure 5。

I. by designing requirement, reinforcement laying unit preform and eyelid covering laying unit preform are assembled into part preform in seam area, by the technological parameter of designing requirement and position, sew up in part preform seam area 8；

J. according to the eyelid covering of component part preform seam area 8 and the seam area fabric area of reinforcement laying unit, resin molding surface density that woven is corresponding calculates part preform seam area needs the amount of resin molding 5, and the amount of resin molding calculates by the following method:

Each seam area 8 of part preform is made up of 24 layers of eyelid covering laying and 16 layers of reinforcement laying, and the area of corresponding seam area 4 has two i.e. S_CoverAnd S_Muscle, S_CoverFor 1120mm × 30mm, S_MuscleFor 1110mm × 35mm, the resin molding surface density that the woven that 1. calculates by formula is corresponding is W_R=89.1g/m², 5. preform calculates by formula at this required weight resin placed of seam area 8。

G=(24 × S_Cover+16×S_Muscle)×W_R0

=(24 × 1.12 × 0.030+16 × 1.11 × 0.035) × 89.1=127g。

Select and the resin molding that matrix resin is same resin system, thickness 1.0mm, surface density 1240g/m², it is placed on the seam area 8 of typical parts preform by same resin molding size 1050mm × 25mm, 6. show that according to formula resin molding is placed the number of plies and is:

Wherein 7. 0.9 layer calculate by formula, adjusts into the resin molding being of a size of 1050mm × 22.5mm。Therefore the resin molding placing thickness 1.0mm is of a size of 3 layers of 1050mm × 25mm, is of a size of 1 layer of 1050mm × 22.5mm。

K. part preform is carried out mould assembling, die location in corresponding seam area, make a call to the through hole 11 of two round footpath φ 1.5mm in advance, resin molding 5 needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip 12, vacuum film 13 and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

Embodiment 2: shape for hat Material Stiffened Panel structure as shown in Figure 7, this wallboard overall dimensions 4900mm × 900mm, eyelid covering 6 profile is plane, with the shape for hat reinforcement 7 of 4 totally 20 sections of two kinds of different cross section sizes。Material adopts U7192/QY9512,20 layers of eyelid covering, reinforcement 10 layers, it is desirable to fiber volume fraction 56%。U7192 carbon fibre fabric surface density is 195g/m², U7192 carbon fibre fabric adopts T700 fibre density 1.81g/cm³, toughness reinforcing QY9512 resin density 1.24g/cm³。For improving structural integrity, suturing skill is adopted shape for hat reinforcement flange and eyelid covering to be sewed up in seam area 8 shown in Fig. 8, all the other area requirement interlayer toughened, and require to adopt RFI technique to carry out global formation。Processing step is as follows:

A. wallboard is divided into eyelid covering 6 laying unit and reinforcement 7 laying unit by eyelid covering and reinforcement。Eyelid covering 6 laying unit and reinforcement 7 laying unit are carried out subregion by stitching, non-seam area respectively, eyelid covering laying unit has 40 seam area 4, each seam area 4 is pressed the monolateral shift outward 10mm of part seam area 8 and is obtained, remainder is non-seam area 1, and the seam area 4 of eyelid covering laying unit is as shown in Figure 9；Reinforcement seam area 4 is distributed in shape for hat reinforcement both sides, inward flange offsets up 10mm by the tangent line at the R angle between shape for hat reinforcement web 9 and flange Yu reinforcement web 9 and obtains, inward flange is reinforcement seam area 4 to flange outer edge region, every section of reinforcement has 2 seam area 4, mid portion is non-seam area 1, as shown in Figure 10。

B. require according to part fiber volume fraction, the surface density of the fabric side density that adopts, fibre density that fabric adopts and matrix resin density calculation woven correspondence resin molding, be accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SU7192 fabric side density, 195g/m²；

ρ_fThe T700 carbon fiber density that U7192 fabric adopts, 1.81g/cm³；

ρ_RMatrix resin QY9512 density, 1.24g/cm³

V_fTypical parts fiber volume fraction, 56%

W_R0-woven correspondence resin molding surface density, g/m²；

It follows that

The resin molding surface density that monolayer U7192 fabric is corresponding:

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}=\frac{(1-56\%)\×1.24\×195}{56\%\×1.81}=105.0g/m^2$

C. according to the full laying fabric layers of eyelid covering 6 laying unit and reinforcement 7 laying unit, the number of plies of resin molding 3 needed for calculating eyelid covering and the full laying fabric of reinforcement laying unit,

N_Ri=N_fi-1………………………②

Eyelid covering 6 and reinforcement 7 laying unit are full laying, N in formula_fiThe number of plies N of eyelid covering and reinforcement laying unit fabric 2_{F covers}And N_{F muscle}Respectively 20 layers and 10 layers, 2. calculate the number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit by formula_{R covers}And N_{R muscle}:

N_{R covers}=20-1=19 layer

N_{R muscle}=10-1=9 layer

D. according to the number of plies of resin molding 3 needed for the number of plies of eyelid covering 6 laying unit and reinforcement 7 laying unit full laying fabric 2 and full laying fabric 2, the regulation coefficient K of eyelid covering and reinforcement laying unit is calculated_CoverAnd K_Muscle, it is accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{(N_{fi}-1)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

N in formula_fiThe number of plies of part eyelid covering and the full laying fabric of reinforcement laying unit respectively 20 layers and 10 layers, the regulation coefficient calculating eyelid covering and reinforcement laying unit is respectively as follows:

K_Cover=20/ (20-1)=1.05；

K_Muscle=10/ (10-1)=1.11；

E. according to the resin molding surface density W that woven is corresponding_R0And the regulation coefficient K of eyelid covering 6 and reinforcement 7 laying unit_CoverAnd K_Muscle, calculate the resin molding surface density W that eyelid covering and reinforcement laying unit are actually needed_{R covers}And W_{R muscle}；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, 105.0g/m²；

K_i3. the eyelid covering calculated by formula and the regulation coefficient of reinforcement laying unit respectively 1.05 and 1.11；

Calculate eyelid covering and resin molding surface density W that reinforcement laying unit is actually needed_{R covers}And W_{R muscle}:

W_{R covers}=K_Cover·W_R0=1.05 × 105.0=110g/m²

W_{R muscle}=K_Muscle·W_R0=1.11 × 105.0=117g/m²

F. toughness reinforcing QY9512 resin is adopted 4. to calculate the resin molding surface density W that gained laying unit is actually needed by formula_{R covers}And W_{R muscle}Prepare resin molding, resin molding surface density tolerance ± 5g/m², it can be deduced that:

Eyelid covering laying cell tree adipose membrane surface density requires at 105～115g/m²In scope；

Reinforcement laying cell tree adipose membrane surface density requires at 112～122g/m²In scope。

Preparing surface density respectively is 105～115g/m²With 112～122g/m²Resin molding for eyelid covering laying unit and reinforcement laying unit。

G. select surface density at 105～115g/m²Resin molding in scope is according to the measure of the non-seam area 1 of eyelid covering laying unit；Select surface density at 112～122g/m²Resin molding in scope, the measure of the non-seam area 1 after launching according to every section of reinforcement laying unit cross section。

The number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit_{R covers}And N_{R muscle}Respectively N_{R covers}=20-1=19 layer, N_{R muscle}=10-1=9 layer。

H. prepared by laying unit preform:

By the laying direction of designing requirement and order laying eyelid covering and reinforcement laying unit preform respectively, resin molding 3 is successively distinguished by lay-up process laying at the interlayer of eyelid covering and the non-seam area 1 of reinforcement laying unit fabric 2, make eyelid covering laying unit preform and reinforcement laying unit preform together with fabric 2。

I. by designing requirement, reinforcement laying unit preform and eyelid covering laying unit preform are assembled into part preform in seam area, by the technological parameter of designing requirement and position, sew up in part preform seam area 8；

J. according to the eyelid covering of component part preform seam area 8 and the seam area fabric area of reinforcement laying unit, resin molding surface density that woven is corresponding calculates part preform seam area needs the amount of resin molding 5, and the amount of resin molding calculates by the following method:

Each seam area 8 of wallboard preform is made up of 20 layers of eyelid covering laying and 10 layers of reinforcement laying, corresponding seam area area S_{1 covers}～S_{40 cover}And S_{1 muscle}～S_{40 muscle}, wherein S_{1 covers}For 720mm × 40mm, S_{1 muscle}Equal for 700mm × 45mm, all the other seam area width and first seam area, simply length is had any different, and is calculated with first preform seam area 8。1. the resin molding surface density that the woven that calculates by formula is corresponding is W_R=105.0g/m², 5. preform calculates by formula in this required amount of resin placed of seam area 8。

G=(20 × S_{1 covers}+10×S_{1 muscle})×W_R

=(20 × 0.72 × 0.04+10 × 0.70 × 0.045) × 105=94g。

Select and the resin molding that matrix resin is same resin system, thickness 1.5mm, surface density 1860g/m², resin molding length dimension presses reinforced length 700mm, and width is 40mm, is placed on the seam area 8 of wallboard preform, 6. show that according to formula resin molding is placed the number of plies and is:

Wherein 7. adjust into the resin molding being of a size of 700mm × 32mm by formula for 0.8 layer。Therefore the resin molding of this seam area placement thickness 1.5mm is of a size of 1 layer of 700mm × 40mm, is of a size of 1 layer of 700mm × 32mm。All the other seam area resin molding length is pressed corresponding reinforced length, resin molding width and the number of plies and is placed by first seam area。

K. part preform is carried out mould assembling, die location in corresponding seam area, make a call to the through hole 11 of two round footpath φ 1.5mm in advance, resin molding 5 needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip 12, vacuum film 13 and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

Embodiment 3: " J " Material Stiffened Panel structure as shown in figure 12, with 5 " J " type reinforcements 15 on eyelid covering 14。Material adopts U3160/QY9512, and eyelid covering is Varying-thickness, full laying 22 layers, and there are 6 floor intercalation in thickening district 16, and reinforcement is equal thickness totally 16 layers, it is desirable to fiber volume fraction 58%。U3160 carbon fibre fabric surface density is 160g/m², U3160 carbon fibre fabric adopts T300 fibre density 1.76g/cm³, toughness reinforcing QY9512 resin density 1.24g/cm³。For improving the boundary strength between reinforcement and eyelid covering, suturing skill is adopted to sew up at " J " type reinforcement both sides lower flange seam area 8 and eyelid covering 14, all the other area requirement interlayer toughened, and require to adopt RFI technique to carry out global formation。We have employed the technical solution of the present invention, and concrete technology step is as follows:

A. wallboard is divided into by eyelid covering and reinforcement eyelid covering 14 laying unit and " J " type reinforcement 15 laying unit。Eyelid covering 14 laying unit and reinforcement 15 laying unit are carried out subregion by stitching, non-seam area respectively, eyelid covering laying unit has 5 seam area 4, each seam area 4 obtains by the corresponding monolateral shift outward 8mm of part seam area 8, remainder is non-seam area 1, and the seam area 4 of eyelid covering laying unit is as shown in Figure 13；Reinforcement seam area 4 is distributed in " J " type reinforcement two side flange, inside edge obtains with web 9 tangent line by " J " type reinforcement R angle, inward flange is reinforcement seam area 4 to two side flange outer edge region, reinforcement seam area laying is made up of 4-1 and 4-2 two parts, all the other are non-seam area 1, as shown in Figure 14。

B. require according to part fiber volume fraction, the surface density of the fabric side density that adopts, fibre density that fabric adopts and matrix resin density calculation woven correspondence resin molding, be accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SU7192 fabric side density, 160g/m²；

ρ_fThe T700 carbon fiber density that U7192 fabric adopts, 1.76g/cm³；

ρ_RMatrix resin QY9512 density, 1.24g/cm³

V_fTypical parts fiber volume fraction, 58%

W_R0-woven correspondence resin molding surface density, g/m²；

It follows that

Monolayer U3160 fabric correspondence resin molding surface density:

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}=\frac{\left(1-58\%\right)\×1.24\×160}{58\%\×1.76}=81.6g/m^2$

C. according to the full laying fabric layers of eyelid covering 14 laying unit and reinforcement 15 laying unit, the number of plies of resin molding 3 needed for calculating eyelid covering and the full laying fabric of reinforcement laying unit,

N_Ri=N_fi-1………………………②

Eyelid covering 14 and reinforcement 15 laying unit are full laying, N in formula_fiThe number of plies N of eyelid covering and reinforcement laying unit fabric 2_{F covers}And N_{F muscle}Respectively 22 layers and 16 layers, 2. calculate the number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit by formula_{R covers}And N_{R muscle}:

N_{R covers}=22-1=21 layer

N_{R muscle}=16-1=15 layer

D. according to the number of plies of resin molding 3 needed for the number of plies of eyelid covering 14 laying unit and reinforcement 15 laying unit full laying fabric 2 and full laying fabric 2, the regulation coefficient K of eyelid covering and reinforcement laying unit is calculated_CoverAnd K_Muscle, it is accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{(N_{fi}-1)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

N in formula_fiThe number of plies of part eyelid covering and the full laying fabric of reinforcement laying unit respectively 22 layers and 16 layers, the regulation coefficient calculating eyelid covering and reinforcement laying unit is respectively as follows:

K_Cover=22/ (22-1)=1.05；

K_Muscle=16/ (16-1)=1.07；

E. according to the resin molding surface density W that woven is corresponding_R0And the regulation coefficient K of eyelid covering 14 and reinforcement 15 laying unit_CoverAnd K_Muscle, calculate the resin molding surface density W that eyelid covering and reinforcement laying unit are actually needed_{R covers}And W_{R muscle}；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, 81.6g/m²；

K_i3. the eyelid covering calculated by formula and the regulation coefficient of reinforcement laying unit respectively 1.05 and 1.07；

Calculate eyelid covering and resin molding surface density W that reinforcement laying unit is actually needed_{R covers}And W_{R muscle}:

W_{R covers}=K_Cover·W_R0=1.05 × 81.6=86g/m²

W_{R muscle}=K_Muscle·W_R0=1.07 × 81.6=87g/m²

F. toughness reinforcing QY9512 resin is adopted 4. to calculate the resin molding surface density W that gained laying unit is actually needed by formula_{R covers}And W_{R muscle}Prepare resin molding, resin molding surface density tolerance ± 5g/m², it can be deduced that:

Eyelid covering laying cell tree adipose membrane surface density requires at 81～91g/m²In scope；

Reinforcement laying cell tree adipose membrane surface density requires at 82～92g/m²In scope。

Preparation surface density is 82～91g/m²Resin molding be simultaneously used for eyelid covering laying unit and reinforcement laying unit。

G. select surface density at 82～91g/m²Resin molding in scope is respectively according to the measure of the non-seam area 1 after eyelid covering 14 laying unit and every reinforcement 15 laying unit cross section expansion。

The number of plies N of resin molding 3 needed for eyelid covering and reinforcement laying unit_{R covers}And N_{R muscle}It is respectively as follows: N_{R covers}=22-1=21 layer, N_{R muscle}=16-1=15 layer

The size of eyelid covering 14 laying unit periphery intercalation resin molding is consistent with phase intercalation fabric size, and the resin molding number of plies of intercalation is consistent with intercalation fabric layers, totally 6 layers。

H. prepared by laying unit preform:

By the laying direction of designing requirement and order laying eyelid covering and reinforcement laying unit preform respectively, resin molding 3 is successively distinguished by lay-up process laying at the interlayer of eyelid covering and the non-seam area 1 of reinforcement laying unit fabric 2, make eyelid covering laying unit preform and reinforcement laying unit preform together with fabric 2。

I. by designing requirement, reinforcement laying unit preform and eyelid covering laying unit preform are assembled into part preform in seam area, by the technological parameter of designing requirement and position, sew up in part preform seam area 8；

J. according to the eyelid covering of component part preform seam area 8 and the seam area fabric area of reinforcement laying unit, resin molding surface density that woven is corresponding calculates part preform seam area needs the amount of resin molding 5, and the amount of resin molding calculates by the following method:

Wallboard preform seam area 8 is made up of 22 layers of eyelid covering laying and 16 layers of reinforcement laying, corresponding seam area area S_{1 covers}～S_{5 cover}And S_{1 muscle}～S_{5 muscle}, wherein S_{1 covers}For 696mm × 66mm, the S of reinforcement seam area_{1 muscle}Being divided into two parts, size 680mm × 55mm after 4-1 expansion, 8 layers, 4-2 is of a size of 680mm × 50mm, 8 layers。All the other seam area width and first seam area are equal, are only that length is had any different, are calculated with first seam area。1. the resin molding surface density that the woven that calculates by formula is corresponding is W_R=81.6g/m², 5. this required amount of resin placed of seam area 8 of preform calculates by formula。

G=(22 × 0.696 × 0.066+8 × 0.68 × 0.055+8 × 0.68 × 0.05) × 81.6=129g。

" J " type reinforcement resin molding is separated by two side flanges, and every side amount of resin is 129g/2=65g。

Select the resin molding of thickness 1.0mm, surface density 1240g/m², resin molding length dimension presses reinforced length 680mm, and width is 30mm, is placed on the flange seam area of wallboard preform, 6. show that according to formula resin molding is placed the number of plies and is:

Wherein 7. adjust into the resin molding being of a size of 680mm × 18mm by formula for 0.6 layer。Therefore the resin molding of the every side flange placement thickness 1.0mm of this seam area is of a size of 2 layers of 680mm × 30mm, is of a size of 1 layer of 680mm × 18mm。All the other seam area 8 resin molding length is pressed corresponding reinforced length, resin molding width and the number of plies and is placed by first seam area。

K. part preform is carried out mould assembling, die location in corresponding seam area, make a call to the through hole 11 of two round footpath φ 1.5mm in advance, resin molding 5 needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip 12, vacuum film 13 and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

Claims (4)

1. the method for a stitching/resin film infusion moulding resin based composites, it is characterised in that: according to eyelid covering class and reinforcement class, part is divided laying unit, and each laying unit carries out subregion by stitching, non-seam area；The fibre density adopted according to the requirement of part fiber volume fraction, the fabric side density adopted, fabric and matrix resin density, calculate the resin molding surface density that woven is corresponding；Regulation coefficient is calculated according to the full laying number of plies of laying unit；By the resin molding surface density that regulation coefficient is corresponding with woven, calculate the resin molding surface density that laying unit is actually needed, by resin Preparation resin film；Resin molding is by the non-seam area measure of laying unit, in laying unit preform lay-up process, resin molding is successively laid in the interlayer of the laying non-seam area of unit fabric, laying unit preform is prepared together with laying unit fabric, then, by designing requirement laying unit preform it is assembled into part preform in seam area and sews up；Calculate part preform seam area according to the resin molding surface density that part preform seam area fabric area, woven are corresponding and need the amount of resin molding；Part preform assembles with mould, places resin molding, carries out resin transfer and solidification after encapsulation, and its processing step is:

(a). part is divided laying unit according to eyelid covering class and reinforcement class, and each laying unit is carried out subregion by stitching, non-seam area,

Wherein, the monolateral shift outward 0～15mm of seam area of eyelid covering class laying unit, remainder is non-seam area；The seam area of reinforcement class laying unit be the inward flange of reinforcement class laying unit to the outer peripheral region of flange, inward flange offsets up 0～10mm according to the tangent position at the R angle between flange and web, and all the other are non-seam area；

(b). the fibre density adopted according to part fiber volume fraction, the fabric side density adopted, fabric and the surface density of matrix resin density calculation woven correspondence resin molding, it is accurate to one decimal place,

$W_{R0}=\frac{(1-V_f)\·{\mathrm{\ρ}}_R\·W_S}{V_f\·{\mathrm{\ρ}}_f}$ ………………………①

In formula:

W_SFabric side density, g/m²；

ρ_fThe fibre density that fabric adopts, g/cm³；

ρ_RMatrix resin density, g/cm³；

V_fPart fiber volume fraction, %

W_R0-woven correspondence resin molding surface density, g/m²；

(c). according to the full laying fabric layers of laying unit, calculate the resin molding number of plies needed for the full laying fabric of each laying unit,

N_Ri=N_fi-1………………………②

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit, layer；

N_RiThe number of plies of resin molding, layer needed for the full laying fabric of part i-th laying unit；

(d). according to the resin molding number of plies needed for laying unit full laying fabric layers and full laying fabric, calculate the regulation coefficient of each laying unit, be accurate to 2 significant digits,

$K_i=\frac{N_{fi}}{\left(N_{fi}-1\right)}=\frac{N_{fi}}{N_{Ri}}$ ………………………③

In formula:

N_fiThe number of plies of the full laying fabric of part i-th laying unit；

K_iThe regulation coefficient of part i-th laying unit；

(e). the regulation coefficient of the resin molding surface density corresponding according to woven and each laying unit, calculate the resin molding surface density that each laying unit is actually needed；

W_Ri=K_i·W_R0………………………④

In formula:

W_R0By the woven correspondence resin molding surface density that 1. formula calculates, g/m²；

K_iBy the regulation coefficient of the part i-th laying unit that 3. formula calculates；

W_RiThe resin molding surface density that part i-th laying unit is actually needed, g/m²；

(f). require the matrix resin adopted according to Element Design, 4. calculate the resin molding surface density W that gained laying unit is actually needed by formula_RiPrepare resin molding；

(g). by resin molding by the non-seam area measure of laying unit, the resin molding size of the full laying of laying unit is by the non-seam area size of full laying fabric, full laying resin molding number of plies N_RiAccording to the full laying fabric layers N of laying unit_fi2. calculate by formula；

(h). prepared by laying unit preform:

By the laying direction of designing requirement and the order each laying unit preform of laying, by the resin molding successively laying interlayer in the laying non-seam area of unit fabric in lay-up process, make laying unit preform together with fabric；

(i). by designing requirement, laying unit preform is assembled into part preform in seam area, by the technological parameter of designing requirement and position, sews up in part preform seam area；

(j). calculating part preform seam area according to the resin molding surface density that the seam area fabric area of component part preform seam area laying unit, woven are corresponding needs the amount of resin molding；The amount of resin molding calculates by the following method:

If: the seam area of part has n layer fabric, and the seam area area that every layer of fabric is corresponding is S₁～S_n, the surface density of the woven correspondence resin molding 1. calculated by formula is W_R0, the resin molding weight of the required placement of preform seam area is:

G=(S₁+S₂+……+S_n)×W_R0………………………⑤

In formula:

The weight of resin molding, g needed for G preform seam area；

W_R0The surface density of woven correspondence resin molding, g/m²；

S_1～n1～n layer fabric seam area area, m²；

The mode that part preform places resin molding amount in seam area is one of two ways:

The first: selection surface density is W_R0Resin molding, altogether n layer, the area of resin molding is by the respective fabric laying area S in seam area₁～S_n, multiple-layer stacked；

The second: selecting from matrix resin is same resin system, different surface density W_R' resin molding, and by same resin membrane area S place, 6. part preform resin molding number of plies needed for this seam area calculates by formula, is accurate to one decimal place,

$N=\frac{G}{S\·{W_R}^{\′}}$ ………………………⑥

In formula:

Resin molding weight needed for G part preform seam area, g

W_R' select to be positioned over the resin molding surface density of seam area, g/m²；

The resin molding number of plies needed for N preform seam area, layer,

S resin molding area, by the area S of seam area₁～S_nChoose for 0.9～1.1 times of middle maximum；

Place the integer value of N, area is the resin molding of S, and 7. the fractional part numerical value k of N adjusts the area s of resin molding by formula,

S=k S ... ... ... ... ... 7.

Resin molding in the actual placement of seam area is the integer value of N, area is that the resin molding of S adds an aspect and amasss the resin molding into s；

(k). part preform is carried out mould assembling, die location place in corresponding seam area, the punching footpath through hole less than φ 2.0mm in advance, resin molding needed for the seam area calculated is positioned over the mold outer surface of corresponding seam area, adopt sealing joint strip, vacuum film or other air-locked isolated material by resin molding and the isolation of other regional seal, carry out resin transfer after encapsulation and resinophore groups composite is prepared in solidification。

2. the method for a kind of stitching according to claim 1/resin film infusion moulding resin based composites, it is characterised in that: the resin molding surface density that described calculating part is actually needed is accurate to integer-bit。

3. the method for a kind of stitching according to claim 1/resin film infusion moulding resin based composites, it is characterised in that: the resin molding surface density W being actually needed with described calculating gained part_RiPreparing resin molding, its tolerance is ± 5g/m²。

4. the method for a kind of stitching according to claim 1/resin film infusion moulding resin based composites, it is characterized in that: when pawnshop layer unit has intercalation requirement, the non-seam area consistent size of the resin molding size of intercalation and corresponding laying unit intercalation fabric, the intercalation resin molding number of plies is consistent with intercalation fabric layers。