CN101819129B - Testing method of external permeability of fiber fabric surface and testing mold - Google Patents
Testing method of external permeability of fiber fabric surface and testing mold Download PDFInfo
- Publication number
- CN101819129B CN101819129B CN2010101652517A CN201010165251A CN101819129B CN 101819129 B CN101819129 B CN 101819129B CN 2010101652517 A CN2010101652517 A CN 2010101652517A CN 201010165251 A CN201010165251 A CN 201010165251A CN 101819129 B CN101819129 B CN 101819129B
- Authority
- CN
- China
- Prior art keywords
- fabric
- testing
- test
- mold panel
- fluid
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Casting Or Compression Moulding Of Plastics Or The Like (AREA)
Abstract
The invention belongs to a testing method of permeability of porous materials, in particular to a testing method of external permeability of a fiber fabric surface. The method comprises the following steps: firstly, laying fiber fabric to be tested into n numbered steps on a mold panel, and then, sealing to form a mold cavity; carrying out vacuum pumping treatment, measuring and recording distance Ln between each step surface and the mold panel, injecting fluid for testing by utilizing vacuum negative pressure, and recording time tn for the flow front of the fluid for testing to reach each step surface; and drawing a linear relation graph of tn and the square of Ln, fitting to obtain a slope k, and then, calculating the external permeability K of the surface of the fiber fabric to be tested according to the formula. The invention has the advantages of simple operation, high accuracy, strong applicability, low cost, and the like.
Description
Technical field
The present invention relates to the infiltrative method of testing of a kind of porosint, relate in particular to the infiltrative method of testing of a kind of fabric.
Background technology
When using the liquid molding technology to make composite element, the quality of composite element is subjected to influence of various factors, comprises character, the ruuning situation of equipment and the formulation of process conditions etc. at character, matrix and fabric interface of character, the matrix of fibre reinforced materials.Permeability is one of characteristic of fibre reinforced materials, is one of important parameter that influences the liquid molding technology.The fiber pervasion rate can be divided into face intrinsic permeability and face exosmosis rate.The face intrinsic permeability is the index of fluid suffered resistance when passing through the fabric plane.Face exosmosis rate is the parameter of reflection fluid suffered resistance situation during by fabric thickness direction (be Z to).The face intrinsic permeability of fabric and face exosmosis rate are the important parameters of predicting the mold filling process of composite liquid moulding process, carrying out mould design and optimization technology, finally influence the quality and the stability of composite element.It is mobile that the mold filling process of Jue Daduoshuo liquid composite moulding process and optimal design thereof are reduced to two dimension now, promptly only use the face intrinsic permeability, yet, for the compound substance of making complicated shape and structure, particularly the composite element (for example large-scale composite material wind-power blade, hull, engine room cover or the like) in maximization, thick cross section only adopts the face intrinsic permeability then can not satisfy actual needs far away.Along with continuous expansion, particularly maximization, the widespread use of thick section structural member and the variation of fibre reinforced materials that fibre reinforced composites are used, the face exosmosis rate and the measuring technology thereof of fabric demonstrate its importance and actual application value.
At present, both at home and abroad still not having standard about the method for testing of external permeability of fiber fabric surface can reference, promptly forms unified, reliable and stable method of testing as yet.Many scholars study this problem, for example Te Weinuo people's such as (Trevino) discovers, the face exosmosis rate of most of reinforcing materials depends on the thickness of shop layer (referring to " using the alternative fiber felt to analyze the injection 1 of resin: permeability and compressibility method of testing ", " polymer matrix composite " (Analysis of resin injection molding in molds with replaced fiber mats.1:Permeability and compressibility measurement.Polymer composites.), 1991,12 (1), 20-29); Wu people such as (Wu) then designs the circular prefabricated component of a diameter 18mm and finishes the permeability experiment of fabric (referring to " measurement of face exosmosis rate and the application in the molded technology of composite liquid thereof ", " polymer matrix composite " (Trans-plane fluid permeability measurement and its application in liquid composite molding.Polymer Composites), 1994,15 (4), 289-298), this method has designed a pair of concentric drums device and has measured, it utilizes the one dimension experiment measuring face exosmosis rate that flows, and finds that injection pressure influences the test result of permeability; The method of its position, liquid flow forward position is (referring to " utilize and implant the three-dimensional permeability that light transmitting fiber is measured fiber preform " when pacifying certain people such as (Ahn) and then having proposed to utilize pre-buried light transmitting fiber monitoring composite liquid fibrous face exosmosis, " compound substance magazine " (Measurement of the three-dimensional permeability of fiber performs using embedded fiber optic sensors.Journal of Composites Materials), 1995,29 (6), 714-733), the flow front of this method record is fibre-optic infiltration situation, and there is gap in the permeability of the fiber of surveying with reality; Wo Dunan people such as (Woerdeman) has then designed a mathematical model, utilize six one dimensions flow method of testing test in the face of fabric and face exosmosis rate (referring to " measuring the method for three-dimensional permeability among the RTM ", " polymer matrix composite " (Interpretation of 3-D permeability measurements for RTM molding.Polymer Composites), 1995,16 (6), 470-480), this method has proposed to calculate the mathematical model of four face intrinsic permeabilities and two face exosmosis rates, but there is not experimental technique, because several one dimension experiments involved in the literary composition are only feasible in theory, and are difficult in practice realize; The method of tieing up its position, liquid flow forward position when having used heat sensitive sensor to write down composite liquid by fabric face exosmosis in the method for testing of true Bock people such as (Weitzenbock) design is (referring to " measurement of three-dimensional permeability ", " composite A " (Measurement of three-dimensional permeability.Composites Part A), 1998,29A, 159-169), this method is pre-buried heat sensitive sensor between fibrage, thereby has influenced the authenticity that flows; Nai Danuofu (Nedanov) has then proposed to test simultaneously the method for external permeability of fiber fabric surface and face intrinsic permeability (referring to " measuring the method for the three-dimensional permeability of fibre reinforced materials ", " compound substance magazine " (A method to determine 3D permeability of fibrous reinforcements.Journal of composite materials), 2002,36 (2), 241-254), this experiment is to finish certain injection under the flow conditions, in the test of face exosmosis rate, fluid is to obtain by the volume calculation of monitoring fluid inflow fiber by the position of thickness direction; Si Duowen people such as (Stoven) has proposed a kind of variation that utilizes ultrasonic receiver monitoring liquid its flow front position when the fabric thickness direction permeates again, utilize the variation of ultrasound wave in different medium to receive the information of fluid (referring to " the continuous monitoring resin is by the three-dimensional flow of fabric ", " composite A " (Continuous monitoring of three-dimensional resin flow through a fibre perform.Composite:Part A), 2003,34:475-480); People such as Wu Xiaoqing have proposed fabric is made band shape and is wound in disk, constant voltage is injected the fluid test fluid surface face exosmosis rate (referring to the CN1651899A Chinese patent literature) that the method in forward position tests fabric that flows outward then, but the preparation of the banded disk sample of this method is difficulty comparatively, and above-mentioned method of testing majority only is suitable for the test of thin section structural member fabric preformed dignity exosmosis rate, for the test of thick section structural member fabric preformed dignity exosmosis rate efficient ways do not arranged as yet.
In order to adapt to the needs of preparation of maximization, thick cross section composite element and design, develop and set up corresponding face exosmosis rate method of testing and technology has important practical significance.
Summary of the invention
The technical problem to be solved in the present invention is to overcome the deficiencies in the prior art, a kind of method of testing of simple, convenient, accuracy is high, applicability is strong external permeability of fiber fabric surface is provided, a kind of testing mould of simple in structure, easy to operate, external permeability of fiber fabric surface that cost is low also is provided.
For solving the problems of the technologies described above, the technical scheme that the present invention proposes is a kind of method of testing of external permeability of fiber fabric surface, this method may further comprise the steps: at first be to be provided with one that on the mold panel of micropore fabric lay to be measured to be become number of steps be the stepped of n, coat described fabric and form die cavity with the mold panel sealing with a flexible vacuum bag film then; Utilize the external pumped vacuum systems of this flexible vacuum bag film that described die cavity is vacuumized processing, measure and write down the distance L of each fabric step surface apart from mold panel
nUtilize negative pressure of vacuum that test is injected in the die cavity via the micropore that evenly is provided with on the mold panel with fluid again, enter test behind the die cavity with fluid along thickness direction (also being short transverse) impregnation of fibers fabric, observe and note test arrives each fabric step surface with the fluid flow front time t
nL according to record
nAnd t
nValue is made L
2-t or t-L
2Linear relationship chart, obtain the straight slope k in this linear relationship chart after the match, calculate the face exosmosis rate K of fabric to be measured again according to following formula:
In the above-mentioned formula (1), η is the viscosity of test with fluid, and Δ P is the size (because adopt the negative pressure of vacuum injection, negative pressure of vacuum keeps constant in the injection process, therefore can think that negative pressure of vacuum is the pressure differential of injection port and flow front) of negative pressure of vacuum,
The porosity of the fiber preform of forming for fabric to be measured,
Computing formula be:
In the above-mentioned formula (2), M
fQuality for described fabric preform; ρ
fDensity for the used fiber of fabric to be measured; W is the width of described fabric preform; h
1, h
2, h
3..., h
nRepresent the 1st, 2,3 respectively ..., the thickness of n layer step; l
1, l
2, l
3..., l
nRepresent the 1st, 2,3 respectively ..., the length of n layer step.
Technique scheme mainly is to find the solution face exosmosis rate according to the uniflux law of Darcy's law, and the uniflux equation of described Darcy's law is:
In the formula (3), u is the apparent velocity of test with fluid, and η is the viscosity of test with fluid, and P is an injection pressure, and K is a face exosmosis rate, and L is that t tests constantly with fluid flow front position; Formula (3) is made simple transformation can be obtained:
In the formula (4), Δ P is the size of negative pressure of vacuum,
Be the porosity of fiber preform, t is inject time, is under t=0, the L=0 situation in constant voltage and starting condition, and formula (4) is carried out integration can be got:
By formula (5) as seen, determine L
2Just can calculate the face exosmosis rate of fabric to be measured with the relation of t.
In the method for testing of above-mentioned external permeability of fiber fabric surface, described fabric to be measured can be the fabric of various forms, it is big characteristics of technique scheme that the fabric lay is become stepped, the step that forms with ladder shop layer during test is the observation point of test with the fluid flow front, just can write down test reaches different steps with the fluid flow front time t easily and accurately
n, and different distance L
nJust can be used as the flow front position of test, so just solved and tested with the fluid problem that the flow front positional information is difficult to measure on fabric preform thickness direction with fluid.According to flow front position L
nWith time t
nRelation, just can be to L
2-t or t-L
2Mapping is through publish picture the at last slope k of cathetus of linear match.Again above-mentioned formula (5) is done promptly to obtain above-mentioned formula (1) after the simple transformation, just can be calculated the face exosmosis rate K of fabric preform to be measured at last according to formula (1) and the slope k determined.
In the above-mentioned method of testing, lay becomes steppedly can be the uniform step of thickness, the also step that can not wait for thickness, but the even or equal step of preferred thickness (is h
1=h
2=h
3=...=h
n), the step that simplifies the operation of being more convenient for like this makes things convenient for record.
As a total technical conceive, the present invention also provides a kind of testing mould that can be used for the external permeability of fiber fabric surface in the above-mentioned method of testing, described testing mould comprises mold panel and the test storage bin of fluid, and described mold panel is fixed in the storage bin top and forms an airtight cavity volume; Evenly be laid with micropore on the described mold panel, this micropore is connected with the airtight cavity volume of storage bin; Described storage bin bottom is provided with the flow passage that is connected with outside liquid injection system.Described mold panel top is coated with a flexible vacuum bag film and forms a die cavity, offers a vacuum pumping opening that is connected with outside pumped vacuum systems on the described flexible vacuum bag film.
In the above-mentioned testing mould, the upper surface of mold panel is the workplace as lay fabric to be measured, so mold panel should be smooth as far as possible smooth, should have certain rigidity simultaneously to bear the vacuum pressure in the test process; Equally distributed micropore makes mold panel form a screen pack on the mold panel, and the pore diameter range of micropore is preferably 1～100 μ m, to guarantee the even distribution of fluid on fabric and the mold panel surface of contact better, reduces experimental error.
In the above-mentioned testing mould, the effect of storage bin is the test fluid that buffering is injected, and makes test cushion the back with fluid in storage bin and forms evenly smooth flow front and synchronously flatly by the micropore on the mold panel, flood fabric to be measured.
Compared with prior art, the invention has the advantages that: at first, adopt ladder shop layer method to lay the fabric of multilayer in the method for testing of the present invention, this has solved the test definite difficult problem of fluid flow front in the external permeability of fiber fabric surface test process effectively, and method of operating is simple and convenient; Secondly, adopt flexible vacuum bag film encapsulation fabric in method of testing of the present invention and the testing mould, this flexible vacuum bag film can closely be adjacent to the fabric edge under negative pressure of vacuum, can effectively avoid and prevent the experimental error that the runner effect produces in the test process, and injection pressure is a negative pressure of vacuum, test process is simple to operate, data stabilization; Once more, because negative pressure of vacuum injection, the encapsulation of flexible vacuum bag film and ladder shop layer operation are simple, determine that the fluid flow front is easy, therefore method of testing of the present invention is particularly suitable for the measurement of thick cross-section fibers Fabric preform dignity exosmosis rate.In addition, testing mould of the present invention is simple in structure, and cost of manufacture is cheap, and is easy to use, can effectively be applied in the method for testing of the present invention.
Description of drawings
Fig. 1 is the structural representation of the testing mould of external permeability of fiber fabric surface of the present invention;
Fig. 2 is a parameter L in the method for testing of the present invention
nThe implication synoptic diagram;
Fig. 3 is parameter h in the method for testing of the present invention
nThe implication synoptic diagram;
Fig. 4 is a parameter l in the method for testing of the present invention
nImplication synoptic diagram with w;
The L that Fig. 5 records for 36 layers fabric preform in the embodiment of the invention 1
2The linear fit graph of a relation of-t;
The L that Fig. 6 records for 48 layers fabric preform in the embodiment of the invention 1
2The linear fit graph of a relation of-t;
The L that Fig. 7 records for 60 layers fabric preform in the embodiment of the invention 1
2The linear fit graph of a relation of-t;
The L that Fig. 8 records for 72 layers fabric preform in the embodiment of the invention 1
2The linear fit graph of a relation of-t;
The L that the fabric preform that Fig. 9 forms for 02 glass cloth in the embodiment of the invention 2 records
2The linear fit graph of a relation of-t;
The L that the fabric preform that Figure 10 forms for 04 glass cloth in the embodiment of the invention 2 records
2The linear fit graph of a relation of-t;
Figure 11 is the L that the fabric preform of 4: 1 woven cloth compositions in the embodiment of the invention 2 records
2The linear fit graph of a relation of-t;
Figure 12 is the L that the fabric preform of 1: 4 woven cloth composition in the embodiment of the invention 2 records
2The linear fit graph of a relation of-t.
Marginal data:
1, mold panel; 11, micropore; 2, storage bin; 21, airtight cavity volume; 22, flow passage; 3, flexible vacuum bag film; 31, vacuum pumping opening; 4, die cavity; 5, valve; 6, fabric preform.
Embodiment
Below in conjunction with accompanying drawing, the specific embodiment of the present invention is described in detail.
Embodiment 1:
A kind of testing mould of external permeability of fiber fabric surface of the present invention as shown in Figure 1, this testing mould comprises mold panel 1 and the test storage bin 2 of fluid, mold panel 1 is smooth smooth, and energy bearing certain pressure, storage bin 2 is a groove shapes, mold panel 1 is similar to a case lid that covers on storage bin 2, and is fixed in storage bin 2 tops and forms an airtight cavity volume 21.Mold panel 1 top is coated with a flexible vacuum bag film 3 and forms a die cavity 4, and the edge of flexible vacuum bag film 3 and mold panel 1 form sealing, offer a vacuum pumping opening 31 that is connected with outside pumped vacuum systems on the flexible vacuum bag film 3.Evenly be laid with a plurality of micropores 11 (be communicated with the through hole of die cavity 4 and airtight cavity volume 21, see Fig. 1) on the mold panel 1, the aperture of this micropore 11 is 50 μ m; Storage bin 2 bottoms evenly are provided with three flow passages 22 that are connected with outside liquid injection system, and flow passage 22 passes in and out storage bin 2 by the valve 5 control tests of a peripheral hardware with fluid.
Adopt the testing mould of present embodiment that a kind of face exosmosis rate of fabric is tested, concrete grammar is as follows:
At first on mold panel 1 with homemade 04 glass fiber woven cloth (the surface density 300g/m of fabric to be measured
2) lay becomes stair-stepping fabric preform 6 (the ladder shop number of plies gets 36 respectively, 48,60,72 layers four groups, every group number of steps n all gets 6 rank), adopt flexible vacuum bag film 3 covered fiber Fabric preform bodies 6 then and form die cavity 4 with mold panel 1 sealing, the vacuum pumping opening 31 that is provided with on the flexible vacuum bag film 3 is circumscribed with pumped vacuum systems, valve-off 5 then, utilize pumped vacuum systems to begin to vacuumize with compacting fiber Fabric preform body 6, negative pressure of vacuum Δ P is 0.092MPa (constant this negative pressure in the whole test process), and the impermeability of checkout mould; Measure and write down after the compacting on the fabric preform 6 each step surface then apart from the distance L of mold panel 1
n(L
nImplication signal see Fig. 2, n=0,1 ..., 6), open valve 5 after record is finished, utilize negative pressure of vacuum to begin to inject test with fluid 191
#(temperature is 25 ℃ to the UP unsaturated polyester resin, viscosities il is 1.52Pas), test enters in the airtight cavity volume 21 of storage bin 2 by three flow passages 22 on the storage bin 2 with fluid, through after storage bin 2 buffering again by the micropore 11 on the mold panel 1 along thickness direction impregnation of fibers Fabric preform body 6, observe and note test arrives different steps with the fluid flow front time t
n, obtaining test (is the distance L of each step surface apart from mold panel 1 with fluid flow front position L
n) and the relation data of time t, make L
2The linear relationship chart of-t (linear relationship chart of the fabric preform of four kinds of different numbers of plies is respectively as Fig. 5～shown in Figure 8) obtains the straight slope k in this linear relationship chart after the match, a k value that calculates according to different ladders shop layer,
Be worth as shown in table 1, foundation again
Calculate the face exosmosis rate (seeing Table 1) that different ladders are spread fiber preform under the layer in the present embodiment.
Above-mentioned formula
In, η is the viscosity of test with fluid, Δ P is the size of negative pressure of vacuum,
The porosity of the fiber preform of forming for fabric to be measured,
Computing formula be:
Wherein, M
fFor the quality of described fabric preform (in the present embodiment quality of four groups of fabric preforms (36,48,60 and 72 layers) be respectively 944.8,1260.2,1575.4 and 1890.3g); ρ
f(density of used glass fibre is 2.54g/cm in the present embodiment for the density of the used fiber of fabric to be measured
3); W is the width (the width w of fabric preform is 250mm in this example) of described fabric preform; h
1, h
2, h
3..., h
nRepresent the 1st, 2,3 respectively ..., the thickness (Fig. 3 is seen in its implication signal) of n layer step; l
1, l
2, l
3..., l
nRepresent the 1st, 2,3 respectively ..., the length (Fig. 4 is seen in its implication signal) of n layer step.
The test process parameter list of the different ladders shop number of plies among table 1: the embodiment 1
Embodiment 2:
Present embodiment adopts the testing mould identical with embodiment 1.
The object of present embodiment test is respectively 72 layers 02 glass cloth, 36 layers 04 glass cloth, 4: 1 glass woven cloth (latitude 4 is through 1) of 18 layers and 1: 4 glass woven cloth (latitude 1 is through 4) of 18 layers, negative pressure of vacuum Δ P in the test is 0.097MPa, the operation steps of present embodiment method of testing and all the other technological parameters and embodiment 1 identical (linear relationship chart of the fabric preform of four kinds of different numbers of plies is respectively as Fig. 9～shown in Figure 12).
The test result of present embodiment is as shown in table 2 below:
The test process parameter list of the different ladders shop number of plies among table 2: the embodiment 2
Claims (2)
1. the method for testing of an external permeability of fiber fabric surface, this method are to adopt a testing mould to test, and described testing mould comprises mold panel and the test storage bin with fluid, and described mold panel is fixed in the storage bin top and forms an airtight cavity volume; Evenly be laid with micropore on the described mold panel, this micropore is connected with the airtight cavity volume of storage bin; Described storage bin bottom is provided with the flow passage that is connected with outside liquid injection system; This method specifically may further comprise the steps: at first be that on described mold panel fabric lay to be measured to be become number of steps be the stepped of n, coat described fabric and form die cavity with the mold panel sealing with a flexible vacuum bag film then; Utilize the external pumped vacuum systems of this flexible vacuum bag film that described die cavity is vacuumized processing, measure and write down the distance L of each fabric step surface apart from mold panel
nUtilize negative pressure of vacuum that the test in the described storage bin is injected in the die cavity via the micropore that evenly is provided with on the mold panel with fluid again, enter test behind the die cavity with fluid along thickness direction impregnation of fibers fabric, observe and note test arrives each fabric step surface with the fluid flow front time t
nL according to record
nAnd t
nValue is made L
2-t or t-L
2Linear relationship chart, obtain the straight slope k in this linear relationship chart after the match, calculate the face exosmosis rate K of fabric to be measured again according to following formula:
In the above-mentioned formula (a), η is the viscosity of test with fluid, and Δ P is the size of negative pressure of vacuum,
The porosity of the fiber preform of forming for fabric to be measured,
Computing formula be:
In the above-mentioned formula (b), M
fQuality for described fabric preform; ρ
fDensity for the used fiber of fabric to be measured; W is the width of described fabric preform; h
1, h
2, h
3..., h
nRepresent the 1st, 2,3 respectively ..., the thickness of n layer step; l
1, l
2, l
3..., l
nRepresent the 1st, 2,3 respectively ..., the length of n layer step.
2. the method for testing of external permeability of fiber fabric surface according to claim 1 is characterized in that: the thickness of the described step of each layer equates.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101652517A CN101819129B (en) | 2010-05-07 | 2010-05-07 | Testing method of external permeability of fiber fabric surface and testing mold |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101652517A CN101819129B (en) | 2010-05-07 | 2010-05-07 | Testing method of external permeability of fiber fabric surface and testing mold |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101819129A CN101819129A (en) | 2010-09-01 |
| CN101819129B true CN101819129B (en) | 2011-06-22 |
Family
ID=42654305
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101652517A Expired - Fee Related CN101819129B (en) | 2010-05-07 | 2010-05-07 | Testing method of external permeability of fiber fabric surface and testing mold |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101819129B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954743A (en) * | 2014-04-02 | 2014-07-30 | 北京博简复才技术咨询有限公司 | Vacuum assisted resin infusion fabric compacting characteristic and permeability performance integrated testing device |
| RU226154U1 (en) * | 2024-01-26 | 2024-05-22 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" | Equipment for measuring compactability, permeability of preforms and production of elementary samples, taking into account technological heredity |
Families Citing this family (15)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102141504B (en) * | 2011-01-27 | 2013-06-12 | 中国商用飞机有限责任公司 | Testing device and method for testing gas penetration rate in thickness direction of overlay |
| CN102288526B (en) * | 2011-05-17 | 2014-01-29 | 东华大学 | Device and method for detecting permeability of unwoven fabrics |
| CN102490370B (en) * | 2011-11-15 | 2014-01-15 | 中国人民解放军国防科学技术大学 | Liquid model molding technology for preparing polymer matrix composite material |
| CN102539299A (en) * | 2011-12-29 | 2012-07-04 | 山东东岳高分子材料有限公司 | Method for determining porosity of film porous materials by medium soaking method |
| CN102937561B (en) * | 2012-10-17 | 2014-07-02 | 西北工业大学 | Determination method for orthogonal non-woven three-dimensional rectangular fabric permeability |
| CN104297121B (en) * | 2013-07-17 | 2017-04-12 | 中国科学院宁波材料技术与工程研究所 | Measurement method for in-plane unsaturated permeability rates of natural fiber fabric |
| CN103808947B (en) * | 2014-03-11 | 2014-12-03 | 爱威科技股份有限公司 | Test strip sample pouring groove, drying analyzer and sampling pouring and cleaning method of drying analyzer |
| CN106353236A (en) * | 2016-09-21 | 2017-01-25 | 中国商用飞机有限责任公司北京民用飞机技术研究中心 | Device for testing in-plane and out-plane permeability of fabric |
| CN108982323A (en) * | 2018-07-20 | 2018-12-11 | 东北林业大学 | Measuring device and its method for plate preform fiber pervasion rate |
| CN108918386B (en) * | 2018-07-20 | 2020-10-27 | 陈璐 | Composite textile fabric compression-resistant water-permeable detection device |
| CN110095398B (en) * | 2019-05-05 | 2021-08-10 | 三峡大学 | Device and method for measuring porosity by using magnetofluid |
| CN110920099A (en) * | 2019-12-03 | 2020-03-27 | 东方电气（天津）风电叶片工程有限公司 | Method for evaluating permeability of resin or fabric for wind power blade |
| CN111024583B (en) * | 2019-12-30 | 2022-10-21 | 湘潭大学 | Simple method for testing porosity of porous material |
| CN111751260B (en) * | 2020-06-30 | 2021-12-21 | 南京航空航天大学 | Device and method for measuring cross section area and porosity of ceramic-based fiber bundle composite material |
| CN118032618B (en) * | 2024-04-11 | 2024-07-23 | 中国科学院合肥物质科学研究院 | Large-scale superconducting coil VPI insulating layer permeability testing method and device |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651899A (en) * | 2005-02-25 | 2005-08-10 | 天津工业大学 | Method for testing external permeability of fibre fabre surface |
| CN101051019A (en) * | 2007-05-15 | 2007-10-10 | 北京航空航天大学 | Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction |
-
2010
- 2010-05-07 CN CN2010101652517A patent/CN101819129B/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1651899A (en) * | 2005-02-25 | 2005-08-10 | 天津工业大学 | Method for testing external permeability of fibre fabre surface |
| CN101051019A (en) * | 2007-05-15 | 2007-10-10 | 北京航空航天大学 | Permeability detecting device and saturated permeability detecting method fiber spread layer surface and thickness direction |
Non-Patent Citations (4)
| Title |
|---|
| WU.et.al.Trans-plane fluid permeability measurment and its application in liquid composites molding.《Polymer Composites》.1994,第15卷(第4期),289-298. * |
| 杨金水.真空导入模塑工艺树脂流动行为研究.《国防科技大学工学硕士学位论文》.2007,全文. * |
| 杨金水等.真空导入模型工艺树脂流动性规律研究.《宇航材料工艺》.2007,(第5期),22-26. * |
| 罗慧珍等.纤维堆积体厚度方向浸渗特性.《复合材料学报》.2005,第22卷(第5期),83-88. * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103954743A (en) * | 2014-04-02 | 2014-07-30 | 北京博简复才技术咨询有限公司 | Vacuum assisted resin infusion fabric compacting characteristic and permeability performance integrated testing device |
| CN103954743B (en) * | 2014-04-02 | 2016-04-27 | 北京博简复才技术咨询有限公司 | Vacuum assistant resin infused fabric compactingproperties and permeability properties integrated test electricity testing device |
| RU226154U1 (en) * | 2024-01-26 | 2024-05-22 | Федеральное государственное бюджетное образовательное учреждение высшего образования "Казанский национальный исследовательский технический университет им. А.Н. Туполева-КАИ" | Equipment for measuring compactability, permeability of preforms and production of elementary samples, taking into account technological heredity |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101819129A (en) | 2010-09-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101819129B (en) | Testing method of external permeability of fiber fabric surface and testing mold | |
| Sun et al. | Mold filling analysis in vacuum‐assisted resin transfer molding. Part I: SCRIMP based on a high‐permeable medium | |
| Naik et al. | Permeability characterization of polymer matrix composites by RTM/VARTM | |
| Arbter et al. | Experimental determination of the permeability of textiles: A benchmark exercise | |
| CN1306261C (en) | Method for testing external permeability of fibre fabre surface | |
| Stadtfeld et al. | An experimental method to continuously measure permeability of fiber preforms as a function of fiber volume fraction | |
| Joubaud et al. | Numerical simulation of resin infusion and reinforcement consolidation under flexible cover | |
| CN102778423B (en) | Fabric one-way surface permeability testing device and testing method | |
| CN102809530B (en) | Device and method for testing intrinsic permeability of radial surface of fiber fabric | |
| CN102778424B (en) | Fabric thickness directional permeability testing device and testing method | |
| Ma et al. | Permeability characterization of different architectural fabrics | |
| CN108982323A (en) | Measuring device and its method for plate preform fiber pervasion rate | |
| Olivero et al. | Effect of preform thickness and volume fraction on injection pressure and mechanical properties of resin transfer molded composites | |
| CN104297121B (en) | Measurement method for in-plane unsaturated permeability rates of natural fiber fabric | |
| Xin et al. | Study on the resin flow and fiber compaction of tapered composite laminates during autoclave processing | |
| CN106353236A (en) | Device for testing in-plane and out-plane permeability of fabric | |
| CN105954169A (en) | Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric | |
| TW201804146A (en) | Resin transfer molding equipment and method capable of measuring permeability comprising a resin supply unit, a mold unit, a detecting capacitor unit and a control unit; the resin supply unit is connected with the mold unit | |
| Cho et al. | Permeability measurement of a circular braided preform for resin transfer molding | |
| CN110927044A (en) | Testing device and testing method for out-of-plane permeability of fiber reinforced composite prefabricated part | |
| CN104297122B (en) | Measurement method for natural fiber fabric in-plane saturated permeability | |
| CN108790218B (en) | System and method for measuring flow characteristics of resin transfer molding system | |
| Ghabezi et al. | Investigation and modeling of compaction behavior of plain fabrics | |
| Patiño et al. | Methods for permeability measurements of fibrous reinforced preforms | |
| Jiang et al. | Measurement of transverse permeability of fabric preforms using ultrasound monitoring technique in LCM processes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110622 Termination date: 20200507 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |