CN202735220U - Device for testing permeability in thickness directions of fiber fabrics - Google Patents
Device for testing permeability in thickness directions of fiber fabrics Download PDFInfo
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- CN202735220U CN202735220U CN 201220420312 CN201220420312U CN202735220U CN 202735220 U CN202735220 U CN 202735220U CN 201220420312 CN201220420312 CN 201220420312 CN 201220420312 U CN201220420312 U CN 201220420312U CN 202735220 U CN202735220 U CN 202735220U
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Abstract
The utility model discloses a device for testing permeability in thickness directions of fiber fabrics. The device comprises an upper die, a lower die and die cavity thickness brackets. The device has the following beneficial effects: emphasis is put on analysis of the effects of multilayered structures, multi-type unit cells and permutation and combination modes thereof of prefabricated members on spatial distribution of the permeability of the prefabricated members, a mathematic model of the permeability and distribution thereof and structure correlation is built, the formation mechanism and law of the infiltration defect of the composite material are disclosed and the formation criterion and control method of the infiltration defect are developed, thus promoting application and popularization of the composite material in such fields in China as aerospace, cars, buildings and wind power.
Description
Technical field
The utility model relates to a kind of testing of materials field, relates in particular to a kind of fabric thickness direction permeability proving installation.
Background technology
Under the overall background of " large aircraft " national great special project and material technology " compoundization of structure function " development trend, the liquid molded structural member manufacture characteristic because of its integration, low cost, dead size of compound substance receives much attention.Infiltrate defective yet dry spot and hole etc. often occur in its goods, the unevenness of their formation and fiber preform permeance property is closely related.Therefore, make up the correlation models of prefabricated component permeability and distribution and multilayered structure parameter, and then Exact Forecast compound substance infiltration defective, be the key issue that needs to be resolved hurrily.
The utility model content
The utility model is for solving the problems of the technologies described above, a kind of fabric thickness direction permeability proving installation and method of testing are provided, it is simple in structure that it has proving installation, the test result error is little, can accurately make up the correlation models of prefabricated component permeability and distribution thereof and multilayered structure parameter, and then the Exact Forecast compound substance infiltrates the advantage of defective.
To achieve these goals, the utility model adopts following technical scheme.
Fabric thickness direction permeability proving installation of the present utility model comprises upper die and lower die, die cavity thickness support; Described counterdie is provided with groove, is placed with the sieve-board type shunt in the groove; Described die cavity thickness support is pressed between the upper die and lower die, fabric is placed in the die cavity that die cavity thickness support encloses, and cover on the sieve-board type shunt, described fabric thickness direction permeability proving installation also comprises injection port and flash mouth, injection port links to each other with fluid injector, the flash mouth links to each other with measuring apparatus with fluid collection, and described injection port is arranged on the counterdie, and the flash mouth is arranged on the patrix.
Described fluid injector can be the resin injection pump.
The fluid liquid that described fluid injector is used can be soybean oil or resin.
Described patrix is provided with window.
Described die cavity thickness support is comprised of the stainless steel deckle board of identical or different thickness, can be combined into according to actual needs the die cavity of different-thickness.
Described sieve-board type shunt can be the stainless sheet steel with some circular holes, and the sieve-board type shunt is conducive to fluid from concentrating injection port to scatter, and flows to synchronously, equably fabric, increases the accuracy of thickness direction permeability test.
The highly versatile of this proving installation, no matter be the fiber of the various materials such as carbon fiber, glass fibre, boron fibre, alumina fibre, natural plant fibre, organic polymer fiber, or the fiber of the various geometric configurations such as woven cloth, unidirectional cloth, non-bending fabric, nonwoven fabrics can be with its permeability of this device to test.
The utility model also provides a kind of method of testing of fabric thickness direction permeability, comprises the steps:
(1) preparation process before the injection;
(2) step of injection;
(3) measure test figure, and calculate the step of permeability.
In the described step (1),
1) opens upper die and lower die,, dry the oily matter wiped clean of die surface with alcohol or acetone equal solvent; Select or built up cavity thickness support and fix with cylindrical positioning pins according to fabric thickness, at the inboard sealing joint strip (a little higher than die cavity thickness of its thickness support) that pastes of die cavity thickness support.Press sealing strip interior zone size, the cutting fabric.
Note the slit of fabric and sealing joint strip can not be too little can not be too large.If the slit is too little, sealing joint strip occurs will to push fabric when Width extends by compression in short transverse makes its distortion; If the slit is too large, the edge effect during with the formation injection makes fabric permeability test serious distortion.
2) spread and to cover the upper die and lower die that close behind the fabric, and locked mode is fastening.
3) flash mouth and injection port are connected withstand voltage plastic tube; Injection port is connected with filling gun, and the flash mouth links to each other with measuring apparatus with fluid collection.
In the described step (2),
Open the filling gun switch, operation valve is opened, filling liquid in the die cavity.By the time behind the complete wetting fabric, closed control valve.
In the described step (3),
1) fluid volume flow (Q) that flows through the fabric cross section in the time per unit can obtain by measure the fluid volume that the flash mouth flows out in time per unit with measuring cup;
2) area of section (A) width (being the width of fabric) that can multiply by according to the length (being the length of fabric) of die cavity die cavity obtains;
3) pressure differential on the fabric (Δ P) can be taken as the hydrodynamic pressure of injection port, the hydrodynamic pressure of injection port can record by digital pressure gauge (because be that short distance flows at the Fluid Flow in A of thickness direction, fluid outlet is exactly the atmospheric environment end---a standard atmospheric pressure, so the pressure that shows on the digital pressure gauge of injection port is exactly the pressure differential on the fabric);
4) length on the fluid flow direction (L) is the thickness of die cavity;
5) fluid viscosity (μ) then checks in according to the commodity base data table of test with fluid;
6) with above-mentioned physics numberical value of quantity substitution Darcy law, can try to achieve the permeability (K) of fabric on thickness direction.
Principle of the present utility model is Darcy's law,
The Darcy(darcy) explanation of law and physical quantity symbol: in the fibrous composite process, the flow model of resin in reinforcing material adopts the Darcy law usually.This model is to mobile the carried out mathematical description of Newtonian fluid in porous medium.This law can be expressed as: flow through the resin volumetric flow rate (Q) in sample cross section in the time per unit and be directly proportional with pressure differential (Δ P) on area of section (A) and the sample, be inversely proportional to length (L) and viscosity (μ) on the sample flow direction: the dimension of constant K is L
2, be defined as permeability.
The beneficial effects of the utility model are: carry out the multilayered structure-permeance property of fiber preform-resin and infiltrate the integrated research that behavior-compound substance infiltrates defective.The multilayered structure of selective analysis prefabricated component, polymorphic type unit cell and permutation and combination method thereof are on the impact of prefabricated component permeability space distribution, set up the mathematical model of permeability and distribution thereof and structural dependence, disclose formation mechanism and rule that compound substance infiltrates defective, development infiltrates formation criterion and the control method of defective, thereby promotes compound substance in application and the popularization in the fields such as China's Aero-Space, automobile, building, wind-powered electricity generation.
Description of drawings
Fig. 1 is the structural representation of fabric thickness direction permeability proving installation of the present utility model.
Wherein, 1, patrix; 2, counterdie; 3, die cavity thickness support; 4, fabric; 5, injection port; 6, flash mouth; 7, groove; 8, sieve-board type shunt.
Embodiment
The utility model is described in further detail below in conjunction with accompanying drawing and embodiment.
The fabric thickness direction permeability proving installation of the present embodiment comprises patrix 1, counterdie 2, die cavity thickness support 3; Described counterdie 2 is provided with groove 7, is placed with sieve-board type shunt 8 in the groove 7; Described die cavity thickness support 3 is pressed between patrix 1 and the counterdie 2.Fabric 4 is placed in the die cavity that die cavity thickness support 3 encloses, and cover on the sieve-board type shunt 8, described fabric thickness direction permeability proving installation also comprises injection port 5 and flash mouth 6, injection port 5 links to each other with fluid injector, flash mouth 6 links to each other with measuring apparatus with fluid collection, described injection port 5 is arranged on the counterdie 2, and flash mouth 6 is arranged on the patrix 1, and described patrix 1 is provided with window.
The method of testing of the fabric thickness direction permeability of the present embodiment comprises the steps:
(1) preparation process before the injection; 1) opens patrix 1 and counterdie 2,, dry the oily matter wiped clean of die surface with alcohol or acetone equal solvent; Select or built up cavity thickness support 3 and fix with cylindrical positioning pins according to the thickness of fabric 4, at the die cavity thickness support 3 inboard sealing joint strips (a little higher than die cavity thickness of its thickness support 3) that paste.Press sealing strip interior zone size, cutting fabric 4.Note the slit of fabric 4 and sealing joint strip can not be too little can not be too large.If the slit is too little, sealing joint strip occurs will to push fabric 4 when Width extends by compression in short transverse makes its distortion; If the slit is too large, the edge effect during with the formation injection makes fabric permeability test serious distortion.2) spread and to cover close behind the fabric 4 patrix 1 and counterdie 2, and locked mode is fastening.3) flash mouth and injection port are connected withstand voltage plastic tube; Injection port is connected with filling gun, and the flash mouth links to each other with measuring apparatus with fluid collection.
(2) step of injection; Open the filling gun switch, operation valve is opened, filling liquid in the die cavity.By the time behind the complete wetting fabric 4, closed control valve.
(3) measure test figure, and calculate the step of permeability:
1) fluid volume flow (Q) that flows through the fabric cross section in the time per unit can obtain by measure the fluid volume that the flash mouth flows out in time per unit with measuring cup;
2) area of section (A) width (being the width of fabric) that can multiply by according to the length (being the length of fabric) of die cavity die cavity obtains;
3) pressure differential on the fabric (Δ P) is taken as the hydrodynamic pressure of injection port, the hydrodynamic pressure of injection port can record by digital pressure gauge (because be that short distance flows at the Fluid Flow in A of thickness direction, fluid outlet is exactly the atmospheric environment end---a standard atmospheric pressure, so the pressure that shows on the digital pressure gauge of injection port is exactly the pressure differential on the fabric);
4) length on the fluid flow direction (L) is the thickness of die cavity;
5) fluid viscosity (μ) then checks in according to the commodity base data table of test with fluid;
6) with above-mentioned physics numberical value of quantity substitution Darcy law, can try to achieve the permeability (K) of fabric on thickness direction.
Although above-mentionedly by reference to the accompanying drawings embodiment of the present utility model is described; but be not the restriction to the utility model protection domain; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various modifications that creative work can make or distortion still in protection domain of the present utility model.
Claims (5)
1. a fabric thickness direction permeability proving installation is characterized in that, comprises upper die and lower die, die cavity thickness support; Described counterdie is provided with groove, is placed with the sieve-board type shunt in the groove; Described die cavity thickness support is pressed between the upper die and lower die, fabric is placed in the die cavity that die cavity thickness support encloses, and cover on the sieve-board type shunt, described fabric thickness direction permeability proving installation also comprises injection port and flash mouth, injection port links to each other with fluid injector, the flash mouth links to each other with measuring apparatus with fluid collection, and described injection port is arranged on the counterdie, and the flash mouth is arranged on the patrix.
2. fabric thickness direction permeability proving installation as claimed in claim 1 is characterized in that, described fluid injector is the resin injection pump.
3. fabric thickness direction permeability proving installation as claimed in claim 1 is characterized in that, the fluid that described fluid injector is used is soybean oil or resin.
4. fabric thickness direction permeability proving installation as claimed in claim 1 is characterized in that, described patrix is provided with window.
5. fabric thickness direction permeability proving installation as claimed in claim 1 is characterized in that, described die cavity thickness support is comprised of the stainless steel deckle board of identical or different thickness.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220420312 CN202735220U (en) | 2012-08-22 | 2012-08-22 | Device for testing permeability in thickness directions of fiber fabrics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220420312 CN202735220U (en) | 2012-08-22 | 2012-08-22 | Device for testing permeability in thickness directions of fiber fabrics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202735220U true CN202735220U (en) | 2013-02-13 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220420312 Expired - Fee Related CN202735220U (en) | 2012-08-22 | 2012-08-22 | Device for testing permeability in thickness directions of fiber fabrics |
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| CN (1) | CN202735220U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778424A (en) * | 2012-08-22 | 2012-11-14 | 山东大学 | Fabric thickness directional permeability testing device and testing method |
| CN106525692A (en) * | 2016-12-22 | 2017-03-22 | 合肥学院 | Testing device and system for permeation rate of porous material |
| CN110779846A (en) * | 2019-10-15 | 2020-02-11 | 北京航空航天大学 | Method for testing gas surface internal permeability of unsaturated impregnated fiber/resin prepreg |
-
2012
- 2012-08-22 CN CN 201220420312 patent/CN202735220U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102778424A (en) * | 2012-08-22 | 2012-11-14 | 山东大学 | Fabric thickness directional permeability testing device and testing method |
| CN102778424B (en) * | 2012-08-22 | 2014-12-17 | 山东大学 | Fabric thickness directional permeability testing device and testing method |
| CN106525692A (en) * | 2016-12-22 | 2017-03-22 | 合肥学院 | Testing device and system for permeation rate of porous material |
| CN110779846A (en) * | 2019-10-15 | 2020-02-11 | 北京航空航天大学 | Method for testing gas surface internal permeability of unsaturated impregnated fiber/resin prepreg |
| CN110779846B (en) * | 2019-10-15 | 2021-02-19 | 北京航空航天大学 | Method for testing gas in-plane permeability of unsaturated impregnated fiber/resin prepreg |
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| 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: 20130213 Termination date: 20150822 |
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| EXPY | Termination of patent right or utility model |