CN107310226A - A kind of assorted fibre plate - Google Patents
A kind of assorted fibre plate Download PDFInfo
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- CN107310226A CN107310226A CN201710681734.4A CN201710681734A CN107310226A CN 107310226 A CN107310226 A CN 107310226A CN 201710681734 A CN201710681734 A CN 201710681734A CN 107310226 A CN107310226 A CN 107310226A
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- fiber
- fibre plate
- assorted fibre
- elongation
- ductility
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- 239000000835 fiber Substances 0.000 title claims abstract description 267
- 239000011347 resin Substances 0.000 claims abstract description 18
- 229920005989 resin Polymers 0.000 claims abstract description 18
- 239000011159 matrix material Substances 0.000 claims abstract description 10
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 3
- 239000010703 silicon Substances 0.000 claims abstract description 3
- 229920002748 Basalt fiber Polymers 0.000 claims description 11
- 229920000049 Carbon (fiber) Polymers 0.000 claims description 11
- 239000004917 carbon fiber Substances 0.000 claims description 11
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 claims description 11
- 239000003365 glass fiber Substances 0.000 claims description 10
- 229920006231 aramid fiber Polymers 0.000 claims description 9
- 230000001186 cumulative effect Effects 0.000 claims description 4
- 230000003014 reinforcing effect Effects 0.000 abstract description 8
- 239000002131 composite material Substances 0.000 abstract description 4
- 230000000694 effects Effects 0.000 abstract description 4
- 239000000463 material Substances 0.000 description 40
- 239000000203 mixture Substances 0.000 description 11
- 239000010410 layer Substances 0.000 description 7
- 239000004918 carbon fiber reinforced polymer Substances 0.000 description 6
- 239000011094 fiberboard Substances 0.000 description 6
- 238000012360 testing method Methods 0.000 description 4
- 239000011229 interlayer Substances 0.000 description 3
- 230000002787 reinforcement Effects 0.000 description 3
- 238000005728 strengthening Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000003475 lamination Methods 0.000 description 2
- 238000002386 leaching Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012827 research and development Methods 0.000 description 2
- 238000012546 transfer Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 230000032798 delamination Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000009826 distribution Methods 0.000 description 1
- 239000013013 elastic material Substances 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000011521 glass Substances 0.000 description 1
- 238000007731 hot pressing Methods 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000009828 non-uniform distribution Methods 0.000 description 1
- 239000004033 plastic Substances 0.000 description 1
- 229920003023 plastic Polymers 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000002023 wood Substances 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B27/00—Layered products comprising a layer of synthetic resin
- B32B27/06—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material
- B32B27/08—Layered products comprising a layer of synthetic resin as the main or only constituent of a layer, which is next to another layer of the same or of a different material of synthetic resin
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/02—Synthetic macromolecular fibres
- B32B2262/0261—Polyamide fibres
- B32B2262/0269—Aromatic polyamide fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/101—Glass fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/10—Inorganic fibres
- B32B2262/106—Carbon fibres, e.g. graphite fibres
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2262/00—Composition or structural features of fibres which form a fibrous or filamentary layer or are present as additives
- B32B2262/14—Mixture of at least two fibres made of different materials
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/51—Elastic
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B32—LAYERED PRODUCTS
- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B2307/00—Properties of the layers or laminate
- B32B2307/50—Properties of the layers or laminate having particular mechanical properties
- B32B2307/54—Yield strength; Tensile strength
Abstract
The assorted fibre plate of reinforcing flexural member ductility can be increased substantially the present invention relates to a kind of.The assorted fibre plate is stretched rate fiber, resin matrix by high-elongation fiber, middle elongation percentage fiber and high-strength low-ductility and constituted；The high-elongation fiber, middle elongation percentage fiber and high-strength low-ductility stretch rate fiber and are distributed in intrinsic silicon.In the assorted fibre plate, length direction and a angle of the assorted fibre plate length direction in fixation of fiber；Two different fibers are along its length in fixed β angles；The value at a angles is 0~45 °, and the value at the β angles is 0~90 °.The present invention suppresses the linksystem fracture that high-strength low-ductility stretches other caused fibers after rate fibrous fracture by the collective effect of high-elongation fiber and middle elongation percentage fiber, absorb high-strength low-ductility and stretch the brought impact of rate fiber early part fracture, make assorted fibre plate remain to continue to carry after high-strength low-ductility stretches rate fibrous fracture, show good ductility.It the composite can be widely applied to field of civil engineering.
Description
Technical field
The present invention relates to a kind of assorted fibre plate, the structural strengthening that can be widely applied in civil engineering.
Background technology
Carbon fibre composite (Carbon Fiber Reinforced Plastic, referred to as " CFRP ") reinforcement technique tool
Have the advantages that high-strength light high-modulus, construct it is convenient, corrosion-resistant, no matter civil buildings, industrial building or bridge reinforcing
All it has been widely used in engineering.But relevant experimental study shows, although CFRP reinforces the ultimate bearing capacity of flexural member
There is significant raising, but its ductility there is no increase in proportion.The structure of strengthening reconstruction is except that will have higher hold
Carry beyond power, it is necessary to have enough ductility to ensure strengthening reconstruction safety of structure, the structure especially provided fortification against earthquakes in needs
In it is even more so.
CFRP linear elastic materials property and fracture elongation far below steel are to cause CFRP to reinforce flexural member to prolong
The poor main cause of property.And improve that fracture elongation is the simplest and effective method is exactly by carbon fiber by immingling technology
Fiber hybrid composite (Hybrid Fiber Reinforced are made with one or more high-elongation fiber hybrids
Plastics, referred to as " HFRP "), the characteristics of making its each component fibrous mechanical property gives full play of, and is ensureing that it is high that it has
CFRP deficiency can be made up while strong high-elastic mould.But from the point of view of current developmental achievement, HFRP applies to military project, boat mostly
The industry such as it, and these HFRP developmental achievements belong to industry secret not external disclosure mostly, cause HFRP to be led in engineering reinforcement
The research and development and application in domain do not obtain great breakthrough always.Therefore, research and development, which can be improved, reinforces Flexural strength component ductility
HFRP is by with great development potentiality and huge economic value.
The content of the invention
The assorted fibre plate of reinforcing flexural member ductility can be increased substantially it is an object of the invention to provide a kind of.
Assorted fibre plate provided by the present invention is to stretch rate fibre by high-elongation fiber, middle elongation percentage fiber and high-strength low-ductility
Dimension is formed by certain way laying after resin matrix infiltration hardening.
A kind of assorted fibre plate of the present invention, it is described by assorted fibre plate high-elongation fiber 1, middle elongation percentage fiber 2 and height
Strong low elongation fiber 3, resin matrix 4 are constituted；It is fine that the high-elongation fiber 1, middle elongation percentage fiber 2 and high-strength low-ductility stretch rate
Dimension 3 is distributed in intrinsic silicon；The elongation percentage of the high-elongation fiber 1 is more than or equal to 2.4%, the extension of middle elongation percentage fiber 2
Rate is 1.9~2.1%, and the elongation percentage that high-strength low-ductility stretches rate fiber 3 is 1.4~1.6% and intensity is more than or equal to 3000MPa.Institute
Stating distribution includes being uniformly distributed and the mode such as non-uniform Distribution.
In a kind of assorted fibre plate of the present invention, the assorted fibre plate, length direction and the assorted fibre plate length of fiber
Direction is in fixed a angles；The value at a angles is 0~45 °.Preferably 30~45 °.More preferably 45 °.
Preferably, in a kind of assorted fibre plate of the invention, the assorted fibre plate, two different fibers edges are long
Direction is spent in fixed β angles；The value at the β angles is 0~90 °.
One of preferably, in a kind of assorted fibre plate of the invention, the assorted fibre plate, two different fibers
Along its length in fixed β angles；The number of degrees=the 2a at the β angles number of degrees.
Preferably, a kind of assorted fibre plate of the invention, the high-elongation fiber be selected from high-strength glass fibre and/
Or aramid fiber；The elongation percentage of the high-strength glass fibre is more than or equal to 2.5%, intensity and is more than or equal to 2200MPa；The aramid fiber
The elongation percentage of fiber is more than or equal to 2.4%, intensity and is more than or equal to 1800MPa；
The middle elongation percentage fiber is basalt fibre；The elongation percentage of the basalt fibre is 1.9~2.1% and strong
Degree is more than or equal to 2000MPa；
The high-strength low-ductility stretches rate fiber for carbon fiber；The elongation percentage of the carbon fiber is 1.4~1.6% and intensity is big
In equal to 3000MPa.
Preferably, a kind of assorted fibre plate of the invention, along perpendicular to the assorted fibre plate thickness direction；Will be mixed
Miscellaneous fiberboard is divided into n parts of average thickness, and the n is for odd number and more than or equal to 3；It is sandwich center to define most middle portion,
After the assorted fibre plate level is placed, more than sandwich center first part think surely+1 part, more than sandwich center second
Part thinks+2 parts, by that analogy until the+(n-1)/2 part, define first part below sandwich center and think -1 part, sandwich surely surely
More than center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；The high-strength low-ductility at the sandwich center is stretched
The content of rate fiber is more than in other any portions, and high-strength low-ductility stretches the content of rate fiber；Take the absolute value of number；Absolute value is most
In big 2 parts, the content of its high-elongation fiber is more than the content of high-elongation fiber in other any portions.
Preferably, a kind of assorted fibre plate of the invention, along perpendicular to the assorted fibre plate thickness direction；Will be mixed
Miscellaneous fiberboard is divided into n parts of average thickness, and the n is for odd number and more than or equal to 3；It is sandwich center to define most middle portion,
After the assorted fibre plate level is placed, more than sandwich center first part think surely+1 part, more than sandwich center second
Part thinks+2 parts, by that analogy until the+(n-1)/2 part, define first part below sandwich center and think -1 part, sandwich surely surely
More than center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；The high-strength low-ductility at the sandwich center is stretched
The content of rate fiber is more than the content that high-strength low-ductility in other any portions stretches rate fiber；The absolute value of number is taken, absolute value is most
In big 2 parts, the content of its high-elongation fiber is more than the content of high-elongation fiber in other any portions.And absolute value phase
Deng number in, high-elongation fiber, middle elongation percentage fiber, high-strength low-ductility stretch rate fiber content difference it is equal.
As further preferred scheme, a kind of assorted fibre plate of the invention, along perpendicular to the assorted fibre plate thickness
Direction；Assorted fibre plate is divided into n parts of average thickness, the n is for odd number and more than or equal to 3；Defining most middle portion is
Sandwich center, by the assorted fibre plate level place after, more than sandwich center first part think surely+1 part, sandwich center with
On second part think+2 parts surely, by that analogy until the+(n-1)/2 part, define first part below sandwich center think surely-
1 part, more than sandwich center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；The height at the sandwich center
The content of strong low elongation fiber is more than the content that high-strength low-ductility in other any portions stretches rate fiber；The absolute value of number is taken,
In 2 parts of maximum absolute value, the content of its high-elongation fiber is more than the content of high-elongation fiber in other any portions；And
In the equal number of absolute value, the content difference that high-elongation fiber, middle elongation percentage fiber, high-strength low-ductility stretch rate fiber is equal.
In addition, high-elongation fiber, middle elongation percentage fiber, high-strength low-ductility stretch the content of at least one of rate fiber fiber by
The size of number absolute value, changes in gradient.
Preferably, a kind of assorted fibre plate of the invention, along perpendicular to the assorted fibre plate thickness direction；Will be mixed
Miscellaneous fiberboard is divided into n parts of average thickness, and the n is for odd number and more than or equal to 3；It is sandwich center to define most middle portion,
After the assorted fibre plate level is placed, more than sandwich center first part think surely+1 part, more than sandwich center second
Part thinks+2 parts, by that analogy until the+(n-1)/2 part, define first part below sandwich center and think -1 part, sandwich surely surely
More than center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；In absolute value identical number, fiber
Length direction and assorted fibre plate length direction be in a angles；The value at a angles is any certain value in 0~45 °；Absolute
In the different number of value, the value at a angles is different.
Preferably, in a kind of assorted fibre plate of the invention, the assorted fibre plate, the volume of resin matrix (4)
Account for the 40 ± 5% of assorted fibre plate cumulative volume；Remaining is volume shared by fiber；
It is cumulative volume to define volume shared by fiber, and high-strength low-ductility stretches the volume of the total volume 20%~40% of rate fiber,
The volume of the total volume 20%~40% of middle elongation percentage fiber, the volume of the total volume 40% of high-elongation fiber~
60%.
Preferably, high-strength low-ductility stretches the body of rate fiber in a kind of assorted fibre plate of the invention, the sandwich center
Product percentage composition is 20%~40%, and the volumn concentration of resin is 20%~40%；It is high in 2 parts of maximum absolute value
The volumn concentration of elongation percentage fiber is 40%~60%%, and the volumn concentration of resin is 40 ± 5%.
The beneficial effects of the invention are as follows civil engineering of the invention is pre- with the high-elongation fiber in interlayer assorted fibre plate
Leaching material and middle elongation percentage fiber prepreg material serve the effect for improving assorted fibre plate ductility jointly, and rate fiber is stretched in high-strength low-ductility
Elongation percentage prepreg reduces the influence of stress concentration in during fault rupture, makes stress smooth transfer to middle elongation percentage fiber prepreg material
With high-elongation fiber prepreg material, assorted fibre plate can continue to bearing load, until reaching middle elongation percentage fiber prepreg material
Fracture elongation is just broken, and assorted fibre plate shows delamination failure and is progressively broken, and assorted fibre plate is reinforced by curved structure
The deformability of part has increased significantly.And the high-strength low-ductility in the civil engineering interlayer assorted fibre plate of the present invention is stretched
Rate fiber prepreg material serves the effect for improving assorted fibre plate ultimate tensile strength and modulus of elasticity, reinforces assorted fibre plate
The ultimate bearing capacity of flexural member is compared to can improve 50%~70% before reinforcing.In the collaborative work of three kinds of fiber prepreg material
Under, assorted fibre plate can also have preferable ductility while high-strength, high elastic modulus is taken into account, accordingly, it is capable to significantly carry
Reinforcing flexural member ductility is increased substantially on the premise of high limit bearing capacity.The * * fiber prepreg material refer in the present invention
It is to take ultra-thin resin bed, * * fibers is layed on the A faces of taken resin bed by set angle, then preheating, precompressed, is obtained
The resin bed of * * fibers is carried to A faces, one side is then turned over, aforesaid operations are repeated on B, * * fiber prepreg material are obtained.Will be each pre-
Leaching material is pressed after setting structure lamination, and hot pressing obtains finished product.
Brief description of the drawings
Fig. 1 is the structural representation of the through-thickness of embodiment 1；
Fig. 2 is the structural representation of the through-thickness of embodiment 2；
Fig. 3 is the structural representation of the through-thickness of embodiment 3；
Fig. 4 is the structural representation of the through-thickness of embodiment 4；
Fig. 5 is the structural representation of embodiment 5 in the width direction；
Fig. 6 is the HFRP of high-strength glass/basalt/carbon fiber hybrid load-deformation curve；
Fig. 7 is the HFRP of aramid fiber/basalt/carbon fiber hybrid load-deformation curve；
In figure, 1 is high-strength glass fibre or aramid fiber, and 2 be basalt fibre, and 3 be carbon fiber, and 4 be resin matrix；α
For fibre length direction and the angle of assorted fibre plate length direction, β is the angle of fiber crossovers.
Embodiment
Embodiment 1：
The structure of the present embodiment is as shown in figure 1, every layer of fiber prepreg material comprises only a kind of fiber prepreg material, using lamination
Laying.The elongation percentage fiber prepreg material in being laid between high-elongation fiber prepreg material and high-strength low-ductility stretch rate fiber prepreg material.
The power that fiberboard radial direction is acted in the present embodiment is born by fiber and resin matrix respectively, but is mainly born by fiber,
The main function of resin matrix is fiber to be positioned and fixed and is transmitted the stress between fiber.Can be according to reinforcing engineering
Actual requirement adjustment high-strength glass fibre prepreg, basalt fibre prepreg and carbon fiber prepreg between ratio and fibre
The number of plies of prepreg is tieed up, completes prefabricated before construction.The width of assorted fibre plate, but can be according to work between 100mm-500mm
The actual requirement of journey is adjusted by prefabricated mould.The thickness of assorted fibre plate is relevant with the number of plies of fiber prepreg material, layer
Number is more, and thickness is bigger, between 0.2mm-5mm.High-strength low-ductility stretches rate prepreg, middle elongation percentage fiber prepreg material and high extension
The ratio between volume between rate fiber prepreg material three can be adjusted according to the actual requirement of engineering.
Embodiment 2：
The structure of the present embodiment is as shown in Fig. 2 material that embodiment 2 is used and mix ratio and the basic phase of embodiment 1
Together, difference is：Every layer of fiber prepreg material contains two kinds of different fibers, and every layer of fiber prepreg material lays shape using staggered floor
Mix into sandwich.
Embodiment 3：
The structure of the present embodiment is as shown in figure 3, material that embodiment 3 is used and mix ratio and the basic phase of embodiment 1
Together, difference is：Every layer of fiber prepreg material contains three kinds of different fibers, and every layer of fiber prepreg material lays shape using staggered floor
Mix into sandwich.
Embodiment 4：
The structure of the present embodiment is as shown in figure 4, material that embodiment 4 is used and mix ratio and the basic phase of embodiment 1
Together, difference is：A part of fiber prepreg bed of material contains two kinds of fibers, and another part fiber prepreg bed of material contains three kinds of fibres
The ratio between dimension, the fiber prepreg bed of material containing two kinds of fibers and number of plies of the fiber prepreg bed of material containing three kinds of fibers are 2：1, contain
The fiber prepreg bed of material of two kinds of fibers uses high-elongation fiber and middle both fibers of elongation percentage fiber, every layer of fiber prepreg material
Laid using staggered floor and to form sandwich and mix.
Embodiment 5：
The present embodiment as shown in figure 5, the material of embodiment 5 and mixing ratio and embodiment 1, embodiment 2, embodiment 3
Essentially identical with embodiment 4, embodiment 5 can use the basic structure of embodiment 1, embodiment 2, embodiment 3 and embodiment 4, no
It is with part：Fiber prepreg material with fixed angle α with panel length direction to intersect laying, and α is 45 ° (while 45 ° are optimal
Condition), the horizontal ultimate tensile strength and modulus of elasticity of assorted fibre plate is improved with this.
The following is the content of experiment：
First, test material
The high-elongation fiber prepreg material (1) uses high-strength glass fibre prepreg or aramid fiber prepreg, in prolong
Stretch rate fiber prepreg material (2) and use basalt fibre prepreg, high-strength low-ductility stretches rate fiber prepreg material (3) and uses carbon fibre initial rinse
Material.Resin matrix (4) is using conventional hygrometric state resin.Material property is as shown in the table：
Table 1：Single Fiber component FRP performances
2nd, longitudinal stretching result of the test
In order to study different kinds of fibers and it is different mix ratio to HFRP longitudinal stretching mechanics performance, mix rule
The influence of rule and ductility, has carried out HFRP tensile performance in wale-wise contrast test.It is made accordingly by the promiscuous mode in table 2
HFRP, wherein S, A, B and C represent high-strength glass fibre, aramid fiber, basalt fibre and carbon fiber respectively, and S/B/C represents height
Strong glass fibre, basalt fibre and carbon fiber are mixed the HFRP being made by corresponding proportion interlayer, and remaining expression is similar.
Table 2：Promiscuous mode and mechanical property
Continued 2
Result of the test to table 2 is analyzed and studied：
High-elongation fiber stretches the modulus of elasticity for the HFRP that rate fiber hybrid is made compared to single Gao Yan with high-strength low-ductility
The FRP for stretching rate fiber improves about 35%~75%, and middle elongation percentage fiber stretches the HFRP that rate fiber hybrid is made with high-strength low-ductility
Modulus of elasticity improve about 35%~55% compared to the HFRP of single middle elongation percentage fiber.Comparing result shows to mix high-strength
Low elongation fiber favorably improves HFRP modulus of elasticity, and the volume ratio that high-strength low-ductility is stretched shared by rate fiber is bigger, mixes
The modulus of elasticity of HFRP after miscellaneous is bigger.
No matter high-elongation fiber and high-strength low-ductility stretch rate fiber promiscuous mode or in elongation percentage fiber with it is high-strength low
Raising effect of the promiscuous mode of elongation percentage fiber to HFRP fracture elongation be not obvious, mixes the fracture for the HFRP being made
Elongation percentage is almost consistent with the FRP that single high-strength low-ductility stretches rate fiber.Comparing result explanation mixes system by both promiscuous modes
Into HFRP in low elongation fibrous fracture, cause because stress concentration is excessive high-elongation, middle elongation percentage fiber almost with
Low elongation fiber is broken simultaneously.Although mixing rear modulus of elasticity to be greatly improved, mix rear HFRP ductility not
It is improved, and high-elongation, the performance of middle elongation percentage fiber fail effectively to be played.
The high-strength glass fibre of high-elongation and the aramid fiber of high-elongation mix the HFRP being made mechanical property with
The FRP of single high-elongation fiber mechanical property is more or less the same.And high-elongation fiber is made with middle elongation percentage fiber hybrid
HFRP modulus of elasticity and ultimate tensile strength close to the FRP of single high-elongation fiber, fracture elongation is close to list
The FRP of elongation percentage fiber in one.Comparing result illustrate the promiscuous mode of two kinds of high-elongation fiber hybrids, high-elongation fiber with
The promiscuous mode of middle elongation percentage fiber hybrid is not obvious to the raising improvement result of mechanical property, or even can produce unfavorable shadow
Ring.
The stress-strain of HFRP after high-elongation fiber, middle elongation percentage fiber and high intensity low elongation fiber hybrid
Curve is as shown in Figure 6 and Figure 7.It can be seen that high-strength low-ductility is stretched after rate fibrous fracture, middle elongation percentage fiber weakens stress
The influence of concentration, stress smooth transfer makes its cofibre can continue to carrying, until HFRP reaches the fracture of middle elongation percentage fiber
Elongation percentage is just pulled off.The bullet of HFRP after high-elongation fiber, middle elongation percentage fiber and high intensity low elongation fiber hybrid
Property modulus improves 50%~70% compared to the FRP of single high-elongation fiber, and fracture elongation is high-strength low compared to single
The FRP of elongation percentage fiber improves about 45%.Comparing result illustrates high-elongation fiber, middle elongation percentage fiber and high intensity is low prolongs
The HFRP that the rate fiber hybrid of stretching is made also has higher ductility while high-strength, high elastic modulus is taken into account.
In summary, the mechanical property of assorted fibre plate provided by the present invention mixing better than only two kinds fiber hybrids
Fiberboard, also has higher ductility while high-strength, high elastic modulus is taken into account, can increase substantially reinforcing flexural member
The ductility for reinforcing flexural member is increased substantially on the premise of ultimate bearing capacity, and can be according to the actual requirement of engineering, to mixing
The thickness and width of ratio, the number of plies of fiber prepreg material and fiberboard is adjusted.Therefore, it the composite can be widely applied to soil
Wood engineering field of reinforcement.
Claims (10)
1. a kind of assorted fibre plate, it is characterised in that：Stretched by high-elongation fiber (1), middle elongation percentage fiber (2) and high-strength low-ductility
Rate fiber (3), resin matrix (4) are constituted；It is fine that the high-elongation fiber (1), middle elongation percentage fiber (2) and high-strength low-ductility stretch rate
Dimension (3) is distributed in intrinsic silicon；The elongation percentage of the high-elongation fiber (1) is more than or equal to 2.4%, middle elongation percentage fiber (2)
Elongation percentage be 1.9~2.1%, high-strength low-ductility stretch the elongation percentage of rate fiber (3) for 1.4~1.6% and intensity be more than or equal to
3000MPa。
2. a kind of assorted fibre plate according to claim 1, it is characterised in that：In the assorted fibre plate, the length of fiber
Direction is spent with assorted fibre plate length direction in fixed a angles；The value at a angles is 0~45 °.
3. a kind of assorted fibre plate according to claim 1, it is characterised in that：In the assorted fibre plate, two differences
Fiber along its length in fixed β angles；The value at the β angles is 0~90 °.
4. a kind of assorted fibre plate according to claim 2, it is characterised in that：In the assorted fibre plate, two differences
Fiber along its length in fixed β angles；The number of degrees=the 2a at the β angles number of degrees.
5. a kind of assorted fibre plate according to claim 1, it is characterised in that：
The high-elongation fiber is selected from high-strength glass fibre and/or aramid fiber；The elongation percentage of the high-strength glass fibre is big
In equal to 2.5%, intensity be more than or equal to 2200MPa；The elongation percentage of the aramid fiber be more than or equal to 2.4%, intensity be more than etc.
In 1800MPa；
The middle elongation percentage fiber is basalt fibre；The elongation percentage of the basalt fibre is that 1.9~2.1%, intensity is more than
Equal to 2000MPa；
The high-strength low-ductility stretches rate fiber for carbon fiber；The elongation percentage of the carbon fiber is 1.4~1.6% and intensity is more than etc.
In 3000MPa.
6. a kind of assorted fibre plate according to claim 1, it is characterised in that：Along perpendicular to the assorted fibre plate thickness
Direction；Assorted fibre plate is divided into n parts of average thickness, the n is for odd number and more than or equal to 3；Defining most middle portion is
Sandwich center, by the assorted fibre plate level place after, more than sandwich center first part think surely+1 part, sandwich center with
On second part think+2 parts surely, by that analogy until the+(n-1)/2 part, define first part below sandwich center think surely-
1 part, more than sandwich center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；The height at the sandwich center
The content of strong low elongation fiber is more than in other any portions, and high-strength low-ductility stretches the content of rate fiber；Take the absolute value of number；
In 2 parts of maximum absolute value, the content of its high-elongation fiber is more than the content of high-elongation fiber in other any portions.
7. a kind of assorted fibre plate according to claim 1, it is characterised in that：Along perpendicular to the assorted fibre plate thickness
Direction；Assorted fibre plate is divided into n parts of average thickness, the n is for odd number and more than or equal to 3；Defining most middle portion is
Sandwich center, by the assorted fibre plate level place after, more than sandwich center first part think surely+1 part, sandwich center with
On second part think+2 parts surely, by that analogy until the+(n-1)/2 part, define first part below sandwich center think surely-
1 part, more than sandwich center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；The height at the sandwich center
The content of strong low elongation fiber is more than the content that high-strength low-ductility in other any portions stretches rate fiber；The absolute value of number is taken,
In 2 parts of maximum absolute value, the content of its high-elongation fiber is more than the content of high-elongation fiber in other any portions.And
In the equal number of absolute value, the content difference that high-elongation fiber, middle elongation percentage fiber, high-strength low-ductility stretch rate fiber is equal.
8. a kind of assorted fibre plate according to claim 1, it is characterised in that：Along perpendicular to the assorted fibre plate thickness
Direction；Assorted fibre plate is divided into n parts of average thickness, the n is for odd number and more than or equal to 3；Defining most middle portion is
Sandwich center, by the assorted fibre plate level place after, more than sandwich center first part think surely+1 part, sandwich center with
On second part think+2 parts surely, by that analogy until the+(n-1)/2 part, define first part below sandwich center think surely-
1 part, more than sandwich center second part is thought -2 parts, by that analogy until the-(n-1)/2 part surely；In absolute value identical part
In number, length direction and the assorted fibre plate length direction of fiber are in a angles；The value at a angles is any certain in 0~45 °
Value；In the different number of absolute value, the value at a angles is different.
9. a kind of assorted fibre plate according to claim 1, it is characterised in that：In the assorted fibre plate, resin matrix
(4) volume accounts for the 40 ± 5% of assorted fibre plate cumulative volume；Remaining is volume shared by fiber；
It is cumulative volume to define volume shared by fiber, and high-strength low-ductility stretches the volume of the total volume 20%~40% of rate fiber, in prolong
Stretch the volume of the total volume 20%~40% of rate fiber, the volume of the total volume 40%~60% of high-elongation fiber.
10. a kind of assorted fibre plate according to claim 1, it is characterised in that：High-strength low-ductility is stretched in the sandwich center
The volumn concentration of rate fiber is 20~40%, and the volumn concentration of resin is 20~40%；2 parts of maximum absolute value
In, the volumn concentration of high-elongation fiber is 40~60%, and the volumn concentration of resin is 40 ± 5%.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110938304A (en) * | 2019-12-17 | 2020-03-31 | 湖南工程学院 | Hybrid fiber composite material and preparation method thereof |
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