CN1306261C - Method for testing external permeability of fibre fabre surface - Google Patents
Method for testing external permeability of fibre fabre surface Download PDFInfo
- Publication number
- CN1306261C CN1306261C CNB2005100162312A CN200510016231A CN1306261C CN 1306261 C CN1306261 C CN 1306261C CN B2005100162312 A CNB2005100162312 A CN B2005100162312A CN 200510016231 A CN200510016231 A CN 200510016231A CN 1306261 C CN1306261 C CN 1306261C
- Authority
- CN
- China
- Prior art keywords
- sample
- testing
- fiber
- fabric
- permeability
- 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
- Treatment Of Fiber Materials (AREA)
Abstract
The present invention relates to a method for testing the surfacial external permeability of fiber fabrics. In the method, firstly, fiber fabrics to be tested are prepared into a belt shape and wound into a disk-shaped test sample; then, the test sample are put and clamped in a testing mould composed of an upper mould and a lower mould to make the center of the test sample consistent to the center of a liquid filling hole on the lower mould; liquid with constant pressure is injected through an injection system; the value of the pressure is collected by a computer data collecting system; simultaneously, a digital video camera records the position of fluid passing through the flowing front edge of the test sample of the fiber fabrics, and the surfacial external permeability to be obtained can be calculated on the basis of data obtained by testing experiments according to the flow law of the Darcy's law in isotropic media. The method of the present invention can visually, clearly and exactly reflect the position information of the fluid passing through the flowing front edge of the test sample of the fiber fabrics, and has the advantages of simple method, convenient operation and practicability.
Description
Technical field
The invention belongs to the measuring technology of fabric characteristic, the face exosmosis rate characteristic test method when specially referring to fabric and using as the compound substance reinforcing material, international Patent classificating number intend being Int.Cl
7.G01B 11/00.
Background technology
When using the liquid molding technology to make composite element, its quality 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 the characteristic of fiber, 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.Face exosmosis rate is exactly the parameter of suffered resistance situation when reflecting fluid by the fabric thickness direction.The face intrinsic permeability is the index of fluid suffered resistance when passing through the fabric plane.The face intrinsic permeability of fabric and face exosmosis rate are the mold filling processes of prediction composite liquid moulding process, carry out the important parameter of mould design and optimization technology, finally influence the quality and the stability of composite element.It is mobile that the mold filling process of most liquid composite moulding process and optimal design thereof are reduced to two dimension at present, promptly only use the face intrinsic permeability, and for the compound substance of making complicated shape and structure, only adopt the face intrinsic permeability then can not satisfy actual needs far away.The variation of the continuous expansion, particularly fibre reinforced materials of using along with fibre reinforced composites, importance that the face exosmosis rate of fabric and measuring technology thereof have demonstrated it and practical application meaning.
At present still do not have standard about the method for testing of external permeability of fiber fabric surface both at home and abroad, that is to say does not also have unified, reliable and stable method of testing.Therefore many scholars study this problem, for example: Nai Danuofu (Nedanov) has 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 ", the compound substance magazine, A method to determine 3D permeability of fibrous reinforcements.Journal ofcomposite materials, 2002,36 (2): 241-254).Experiment is to finish certain injection under the flow conditions, and 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.Te Weinuo people such as (Trevino) discovers, the face exosmosis rate of most of reinforcing materials depends on the thickness of shop layer (referring to " analyzing the injection 1 of resin with the alternative fiber felt: measure permeability and compressibility ", polymer composites, Analysis of resin injectionmolding in molds with replaced fiber mats.1:Permeability and compressibilitymeasurement.Polymer composites.1991,12 (1): 20-29), Mr. Wu people such as (Wu) has then designed the circular prefabricated component of 18 millimeters of diameters and has finished the permeability experiment of fabric (referring to " measurement of face exosmosis rate and its application in the liquid molding technology; polymer composites ", Trans-plane fluid permeability measurement and its application in liquidcomposite molding.Polymer Composites, 1994,15 (4), 289-298.).This method has designed a pair of concentric circles Tong device and has measured, and 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 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 (Weitzenb ck) design is (referring to " measurement of three-dimensional permeability ", composite A, Measurement of three-dimensional permeability.Composites Part A, 1998,159-169,29A.).This method is pre-buried heat sensitive sensor between fibrage, thereby has influenced the authenticity that flows; The method of its position, liquid flow forward position was (referring to " utilize and implant the three-dimensional permeability that light transmitting fiber is measured fiber preform " when people such as peace (Ahn) Mr. had then proposed to utilize pre-buried light transmitting fiber monitoring composite liquid by fabric face exosmosis, the compound substance magazine, Measurement of the three-dimensional permeability of fiber preforms using embedded fiber optic sensors.J.Composites Material., 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, has therefore influenced the authenticity that flows too; Si Duowen people such as (St ven) has proposed a kind of variation that utilizes ultrasound wave receptacle 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 flowthrough a fibre preform.Composites:Part A 34 (2003) 475-480.).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 explanation of three-dimensional permeability among the RTM ", polymer composites, Interpretation of 3-D permeability measurements forRTM 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 does not have experimental technique, because involved several one dimensions experiments are only feasible in theory in the literary composition, and is difficult in practice realize.This shows, develop and method of testing and the technology of setting up face exosmosis rate has important practical significance.
Summary of the invention
At the deficiencies in the prior art, the technical problem to be solved in the present invention is a kind of method of measuring external permeability of fiber fabric surface of design, this method can reflect directly perceived, clear, accurately that fluid passes through the positional information of fabric sample flow front, and method is simple, easy to operate, has practicality.
The technical scheme that the present invention solve the technical problem is the method for testing of a kind of external permeability of fiber fabric surface of design, and this method at first is prepared into tested fabric band shape and is wound in the disc sample; Then this sample is placed in the testing mould of upper and lower mould and composition and clamps, and make the center of sample consistent with the liquid injection port center on the counterdie; By the liquid of liquid injection system injection constant pressure, this force value is gathered by computer data acquisition system through pressure transducer; Digital camera record fluid based on test experiments gained data, can calculate the face exosmosis rate asked according to the flow law of Darcy's law in isotropic medium by the position of fabric sample flow front simultaneously.
The method great majority of existing test surfaces exosmosis rate adopt the one dimension current method to finish.During this method test surfaces exosmosis rate, earlier fabric is cut into rectangle, again they are stacked together and form certain thickness rectangular parallelepiped, put into the mould of a rectangular parallelepiped then, require fluid from the linear injection of mould minor face, because the cutting of fiber samples can not be consistent with die size fully, always in the certain slit of marginal existence, causing fluid to take the lead in flowing out along fabric edge (and between mould) usually---this phenomenon is called the edge and flows, therefore be difficult to form desired linear flowing, make experiment be difficult to normally carry out, more can't use Darcy's law and calculate.Method of testing of the present invention is a kind of simple, accurate and data easy to handle measuring method, having overcome existing one dimension current method test surfaces exosmosis rate is easy to generate the edge and flows, flow front can not be accurately monitored, cause the permeability data famine of various fabrics, test inaccurate, the deficiency of practical application difficulty.Method of testing of the present invention is by ingenious design, can also make the measurement of the face exosmosis rate of difficulty test be converted into the measurement of the face intrinsic permeability of easy test, because tested sample face exosmosis rate is a constant, flow front will form one round-shaped, carry out image analysis and calculating easily, thickness direction is increased greatly simultaneously, makes the position of flow front be easy to be recorded, and has important use in practice and is worth.
Description of drawings
Fig. 1 is an external permeability of fiber fabric surface method of testing of the present invention institute use test device synoptic diagram;
Fig. 2 is the disc fabric specimen sample photo that the present invention is prepared into tested fabric;
The flow front photographic images of glass fibre sample when different time when Fig. 3 is to use external permeability of fiber fabric surface method of testing of the present invention to test.
Embodiment
Further narrate the present invention below in conjunction with embodiment:
Its basic composition of the employed proving installation of method of testing of the present invention (referring to Fig. 1) comprises: digital camera 1, pressure transmits frame 2, transparent patrix 3, tested sample 4, metal bed die 5, liquid injection system 6, pressure transducer 7, pad 8, computer data acquisition system 9 etc. are prior art substantially.
When a kind of method of measuring external permeability of fiber fabric surface of the present invention's design is tested (referring to Fig. 1,2 and 3), at first tested fabric is prepared into band shape and is wound in disc sample 4; Then this sample 4 is placed on the centre of upper and lower mould 3 and the 5 testing mould counterdies of forming 5, and makes the center of sample 4 consistent with the liquid injection port center on being positioned at counterdie 5; Liquid is penetrated in the tested fabric sample 4 by injected system 6 with constant pressure, place the position of the digital camera 1 record fluid of transparent patrix 3 tops, and obtain the position of the flow front of different time by the computer image analysis software analysis by fabric sample 4 flow fronts.Based on the porosity of resulting injection pressure, the position of the pairing flow front of different time, tested fiber in the test experiments, these parameters of viscosity of injection fluid, can calculate the exosmosis rate of appearing according to the flow law of Darcy's law in isotropic medium.
Preparation disc fabric sample 4 is one of gordian techniquies in the method for testing of the present invention.The inventive method is further characterized in that the bandwidth Design of described fabric sample 4 is the 5-15 millimeter, and the disk diameter that twines back sample 4 can be the 50-380 millimeter.Described disc sample 4 does not have mandrel, and winding can be finished by existing Special Equipment (wrapping machine).
The described upper and lower mould 3 of the inventive method is relevant with the diameter of described disc fabric sample 4 with the 5 testing mould sizes that constitute.Generally should be greater than the maximum gauge of the diameter of described disc fabric sample 4, and conveniently pick and place described sample and get final product.Maximum gauge according to described disc fabric sample 4 is 380 millimeters, so the testing mould of the embodiment of the invention is of a size of 400 millimeters square.But this is not limited.Described testing mould can be designed as shapes such as the circle that is complementary with described disc fabric sample 4 maximum gauges, rectangle fully.The patrix 3 of described testing mould is transparent, so that the information of fluid by fabric sample flow front position is gathered and write down to digital camera 1.
Not in experiment, not being moved and being out of shape in order to ensure described disc fabric sample 4, make the test of face exosmosis rate accurately, the inventive method is further characterized in that the edge between the upper and lower mould 3 of described testing mould and 5 is equipped with pad 8 (referring to Fig. 1), and its thickness is consistent with the bandwidth of described sample 4; Also design has a pressure transmission frame 2 that is complementary with patrix 3, use during test it can with upper and lower mould 3 and 5 and between pad 8 clamp in the lump.It is the frameworks that are made of metal that pressure transmits frame 2, and shape is suitable mutually with the physical dimension of upper mould 3, so that can exert pressure by fixture such as screw etc., and the sample 4 that clamps upper and lower mould 3,5 and be placed in one.Pad 8 thickness that edge between the upper and lower mould 3 of mould and 5 is installed are consistent with the bandwidth of described sample 4.When if the thickness of described pad 8 hangs down than the bandwidth of described sample 4, upper and lower mould 3 and 5 clamps the intrinsic shape and the structure that can influence sample 4 after samples 4 also pressurize, and the interference fluid is by the permeability of fabric sample; If when the thickness of described pad 8 was higher than the bandwidth of described sample 4, upper and lower mould 3 and 5 can't clamp sample, sample is easy to generate displacement in the experimentation, influences the true record of digital camera 1 convection cell by fabric sample 4 flow front positions.During test, with pad 8 be placed on sample 4 around, transparent patrix 3 is pushed down sample 4 and pad 8, again pressure is transmitted frame 2 and places on the transparent patrix 3, with fixture they are clamped.Under the constant injection pressure of 0.04-0.3Mpa (the accurate numerical value of this pressure is gathered by computer data acquisition system and obtained through pressure transducer) condition, begin test.In brief, the inventive method adopted working pressure transmit frame 2 exert pressure and use pad 8 fixedly the method for specimen size improve measuring accuracy.
The described digital camera 1 record fluid of the inventive method is by the position of fabric sample flow front, utilize existing image processing software, can analyze the information (radius) (referring to Fig. 3) of the fluid of required any time by fabric sample 4 flow front positions, according to the radius of resultant injection pressure, the pairing flow front of different time in the experiment, the viscosity of injecting fluid and these parameters of porosity (computing method are seen formula (2)) of tested fiber, can calculate the exosmosis rate of appearing.
The present invention is owing to the design of different specimen preparations, and described sample 4 is in the reasonable increase of thickness direction, and the flow front position of liquid is with regard to easy observation and accurate recording when making test; The more important thing is and to make face exosmosis rate be converted into the method for testing of face intrinsic permeability, therefore the calculating of face exosmosis rate just can be calculated according to the computing method of face intrinsic permeability, because tested sample face exosmosis rate is a constant, flow front will form one round-shaped, not only image analysis and calculate and to have avoided the edge to flow easily but also effectively; Therefore face exosmosis rate can be calculated according to the Darcy's law of fluid in isotropic medium and find the solution.The flow law calculating formula of described Darcy's law in isotropic medium promptly following (1) formula:
In (1) formula, r
0, r
f, η, ε, Δ P is respectively the inlet radius, the flow front radius, fluid viscosity, fiber porosity and injection pressure, t is the test duration.Fiber porosity ε is one of important parameter that calculates permeability.Because sample 4 of the present invention is unique design, so method of testing of the present invention can not use existing fiber porosity ε computing method, and following (2) formula of should using instead is calculated when using (1) to calculate:
In (2) formula, W
fBe the weight of described disc sample 4, P
fBe the density of described disc sample 4 used fibers, R is the radius of described disc sample 4, and h is the thickness of described pad 8.
Provide specific embodiments of the invention below:
Embodiment 1
Adopt homemade glass fiber tape to prepare disc sample 4.Its specification and performance parameter are as described in Table 1.Fiber porosity ε by formula (2) calculates 71.5% (density of fiber is calculated with 2.54), sample is put into described proving installation, require sample 4 centers consistent, place pad 8, patrix 3, pressure transmission frame 2 successively, make upper and lower mould 3,5 clamp samples 4 with the center of filling orifice; Open fluid then and inject switch, digital camera 1 switch and computer acquisition system 9; Face exosmosis rate can be calculated according to described Darcy's law formula (1), and result of calculation sees Table 2.Embodiment Intermediate gasket thickness h is 9.83 millimeters, and the numerical value of injection constant pressure machine collection pressure transducer as calculated obtains 58675Pa; The inlet diameter is 10 millimeters; Employed fluid is conduction oil YD-320, and viscosity is 60mPa.s in the time of 18 ℃; The radius of flow front is according to the data of digital camera 1 record (Fig. 3 is the image of flow front of several different times of camera record), utilizes image analysis software can obtain the position of the described flow front of different time shown in the table 2 by the numerical analysis to image.
The parameter of the used glass fiber tape of table 1. sample
| Thickness (millimeter) | Width (millimeter) | Density (root/centimetre) | Fabric tissue | Weight (gram) | Diameter (millimeter) |
| 0.1±0.01 | 10±1 | Through 10 latitudes 8 | Plain weave | 161.4 | 170 |
The test result of table 2. glass fabric sample face exosmosis rate
| Time (second) | The flow front radius r f(rice) | Face exosmosis rate K (rice 2) |
| 20 | 0.0275 | 1.689E-11 |
| 40 | 0.0353 | 1.669E-11 |
| 60 | 0.0420 | 1.758E-11 |
| 80 | 0.0472 | 1.783E-11 |
| 100 | 0.0513 | 1.763E-11 |
| 120 | 0.0550 | 1.754E-11 |
| 140 | 0.0576 | 1.688E-11 |
| 160 | 0.0617 | 1.754E-11 |
| 170 | 0.0628 | 1.726E-11 |
| 180 | 0.0643 | 1.727E-11 |
| 200 | 0.0669 | 1.715E-11 |
| 220 | 0.0695 | 1.713E-11 |
| Mean value | 1.728E-11 | |
| Standard deviation (%) | 3.50E-11 | |
| Coefficient of dispersion (%) | 2.03 | |
Embodiment 2
Adopt the homemade glass fiber tape identical with embodiment 1 to prepare sample, its specification and performance parameter are as described in Table 3.Fiber porosity ε by formula (2) calculates 68.7% (density of fiber is calculated with 2.54), injects constant pressure, and the data of machine collection pressure transducer obtain 65532Pa as calculated; Condition such as spacer thickness, fluid viscosity is identical with embodiment 1.The radius of flow front is to carry out resultantly after the image analysis seeing Table 4 according to the data of digital camera 1 record, and gained parameter substitution formula (1) can be calculated the exosmosis rate parameter of appearing.
The parameter of the used glass fiber tape of table 3. sample
| Thickness (millimeter) | Width (millimeter) | Density (root/centimetre) | Fabric tissue | Weight (gram) | Diameter (millimeter) |
| 0.1±0.01 | 10±1 | Through 10 latitudes 8 | Plain weave | 552.1 | 300 |
The test result of table 4. glass fabric sample face exosmosis rate
| Time (second) | The flow front radius r f(rice) | Face exosmosis rate K (rice 2) |
| 10 | 0.0173 | 7.399E-12 |
| 20 | 0.0216 | 7.219E-12 |
| 30 | 0.0246 | 7.095E-12 |
| 40 | 0.0273 | 7.136E-12 |
| 50 | 0.0300 | 7.407E-12 |
| 60 | 0.0327 | 7.800E-12 |
| 70 | 0.0339 | 7.341E-12 |
| 80 | 0.0366 | 7.880E-12 |
| 90 | 0.0381 | 7.812E-12 |
| 100 | 0.0393 | 7.606E-12 |
| 110 | 0.0408 | 7.647E-12 |
| 130 | 0.0435 | 7.642E-12 |
| 150 | 0.0462 | 7.735E-12 |
| 170 | 0.0473 | 7.272E-12 |
| 190 | 0.0504 | 7.642E-12 |
| 210 | 0.0516 | 7.324E-12 |
| 230 | 0.0543 | 7.608E-12 |
| 250 | 0.0558 | 7.510E-12 |
| 270 | 0.0570 | 7.322E-12 |
| 290 | 0.0597 | 7.654E-12 |
| 310 | 0.0624 | 7.994E-12 |
| 330 | 0.0639 | 7.980E-12 |
| 350 | 0.0650 | 7.866E-12 |
| 370 | 0.0666 | 7.885E-12 |
| 390 | 0.0677 | 7.805E-12 |
| Mean value | 7.583E-12 | |
| Standard deviation (%) | 2.67E-11 | |
| Coefficient of dispersion (%) | 3.52 | |
Claims (3)
1. the method for testing of an external permeability of fiber fabric surface, this method at first is prepared into band shape with tested fabric and is wound in disc sample (4); Then this sample (4) is placed in the testing mould that patrix (3) and counterdie (5) form and clamps, and make the center of sample (4) consistent with the liquid injection port center on the counterdie (5), edge between patrix (3) and the counterdie (5) is equipped with pad (8), and its thickness is consistent with the bandwidth of described sample (4); By the liquid of liquid injection system (6) injection constant pressure, this force value is gathered by computer data acquisition system (9) through pressure transducer (7); Digital camera (1) record fluid based on test experiments gained data, can calculate the face exosmosis rate asked according to the flow law of Darcy's law in isotropic medium by the position of fabric sample (4) flow front simultaneously; The calculating formula of the flow law of described Darcy's law in isotropic medium is following (1) formula:
In (1) formula, r
0, r
f, η, ε, Δ P is respectively the inlet radius, the flow front radius, fluid viscosity, fiber porosity and injection pressure, t is the test duration; Described fiber porosity ε calculates with following (2) formula:
In (2) formula, W
fBe the weight of described disc sample (4), P
fBe the density of the used fiber of described disc sample (4), R is the radius of described disc sample (4), and h is the thickness of described pad (8).
2. the method for testing of external permeability of fiber fabric surface according to claim 1 is characterized in that the bandwidth 5-15 millimeter of described fabric sample (4), and disk diameter is the 50-380 millimeter.
3. the method for testing of external permeability of fiber fabric surface according to claim 1 and 2, it is characterized in that also designing a pressure that is complementary with patrix (3) at described testing mould transmits frame (2), use during test it can with patrix (3) and counterdie (5) and between pad (8) clamp in the lump.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100162312A CN1306261C (en) | 2005-02-25 | 2005-02-25 | Method for testing external permeability of fibre fabre surface |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100162312A CN1306261C (en) | 2005-02-25 | 2005-02-25 | Method for testing external permeability of fibre fabre surface |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1651899A CN1651899A (en) | 2005-08-10 |
| CN1306261C true CN1306261C (en) | 2007-03-21 |
Family
ID=34875618
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100162312A Expired - Fee Related CN1306261C (en) | 2005-02-25 | 2005-02-25 | Method for testing external permeability of fibre fabre surface |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN1306261C (en) |
Families Citing this family (17)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101819129B (en) * | 2010-05-07 | 2011-06-22 | 中国人民解放军国防科学技术大学 | Testing method of external permeability of fiber fabric surface and testing mold |
| CN102692369B (en) * | 2012-05-14 | 2014-06-11 | 西北工业大学 | Measuring device and measuring method for measuring axial steady state permeability of continuous fiber bundle |
| CN102778423B (en) * | 2012-08-22 | 2015-04-01 | 山东大学 | Fabric one-way surface permeability testing device and testing method |
| CN102809530B (en) * | 2012-08-22 | 2014-11-05 | 山东大学 | Device and method for testing intrinsic permeability of radial surface of fiber fabric |
| 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 |
| CN103344540B (en) * | 2013-06-28 | 2016-02-03 | 武汉理工大学 | A kind of method of testing of continuous sign Behavior of Hardened Cement Paste packing |
| 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 |
| US9927422B2 (en) * | 2014-05-13 | 2018-03-27 | The Procter & Gamble Company | Method and device for measuring dentin permeability |
| CN104614301A (en) * | 2015-02-11 | 2015-05-13 | 上海同标质量检测技术有限公司 | Automatic monitoring concrete impermeability test system |
| CN105954169A (en) * | 2016-04-20 | 2016-09-21 | 西北工业大学 | Measuring method and measuring system for thickness-direction steady-state permeation rate of fiber fabric |
| CN106872333A (en) * | 2017-03-08 | 2017-06-20 | 西北工业大学 | The measuring method and measuring system of a kind of fabric face intrinsic permeability |
| CN107092787B (en) * | 2017-04-10 | 2020-02-07 | 常州纺织服装职业技术学院 | Prediction method for grey fabric thickness of wool type fabric |
| CN108051349A (en) * | 2017-11-29 | 2018-05-18 | 绍兴文理学院 | A kind of visual Single Fracture permeability dimensional effect testing equipment and method |
| CN108918386B (en) * | 2018-07-20 | 2020-10-27 | 陈璐 | Composite textile fabric compression-resistant water-permeable detection device |
| CN109781488A (en) * | 2019-02-28 | 2019-05-21 | 上纬新材料科技股份有限公司 | A kind of adhesive critical energy release rate double cantilever beam standard sample test plate (panel) and preparation method thereof |
| CN110927044A (en) * | 2019-12-16 | 2020-03-27 | 重庆大学 | Testing device and testing method for out-of-plane permeability of fiber reinforced composite prefabricated part |
| CN115436254B (en) * | 2022-09-05 | 2024-06-25 | 北京航空航天大学 | Permeability test method and device based on narrow band monitoring flow front of carbon nano tube |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6532799B2 (en) * | 2000-01-18 | 2003-03-18 | Florida State University Research Foundation | System for in-situ and on-line monitoring of a perform layup process for liquid composite molding |
| CN1484013A (en) * | 2003-07-22 | 2004-03-24 | 河海大学岩土工程科学研究所 | Instrment for testing geotextile permeability and silting property |
-
2005
- 2005-02-25 CN CNB2005100162312A patent/CN1306261C/en not_active Expired - Fee Related
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6532799B2 (en) * | 2000-01-18 | 2003-03-18 | Florida State University Research Foundation | System for in-situ and on-line monitoring of a perform layup process for liquid composite molding |
| CN1484013A (en) * | 2003-07-22 | 2004-03-24 | 河海大学岩土工程科学研究所 | Instrment for testing geotextile permeability and silting property |
Also Published As
| Publication number | Publication date |
|---|---|
| CN1651899A (en) | 2005-08-10 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN1306261C (en) | Method for testing external permeability of fibre fabre surface | |
| Parnas et al. | The interaction between micro-and macro-scopic flow in RTM preforms | |
| CN101819129B (en) | Testing method of external permeability of fiber fabric surface and testing mold | |
| Sharma et al. | Permeability measurement methods in porous media of fiber reinforced composites | |
| Lam et al. | The permeability and compressibility of aligned and cross‐plied carbon fiber beds during processing of composites | |
| Gupte et al. | Flow near the permeable boundary of a porous medium: An experimental investigation using LDA | |
| Buntain et al. | Compression flow permeability measurement: a continuous technique | |
| CN107941283A (en) | The multi-parameter on-line monitoring system and method for composite material hot-press solidifying process | |
| Stadtfeld et al. | An experimental method to continuously measure permeability of fiber preforms as a function of fiber volume fraction | |
| Drapier et al. | Characterization of transient through-thickness permeabilities of Non Crimp New Concept (NC2) multiaxial fabrics | |
| CN106872335B (en) | Device and method for measuring infiltration performance of porous material based on infrared image processing | |
| CN106546491B (en) | Detachable rock mass lateral load and water pressure coupling auxiliary test device | |
| CN105606275B (en) | The core plate on-line monitoring system and method for a kind of membrane filter plate | |
| Kabachi et al. | Concurrent characterization of through-thickness permeability and compaction of fiber reinforcements | |
| CN104807698B (en) | A kind of method of testing of continuous fiber reinforced composites Poisson's ratio | |
| Wu et al. | A new method to determine fiber transverse permeability | |
| CN210108925U (en) | OFDR distributed sensing optical cable based on transparent soil and soil interface mechanical property testing device | |
| Lynch et al. | Use of a simple, inexpensive pressure sensor to measure hydrostatic resin pressure during processing of composite laminates | |
| CN103076436B (en) | Device for measuring soil lateral pressure and consolidometer | |
| CN104297121B (en) | Measurement method for in-plane unsaturated permeability rates of natural fiber fabric | |
| CN106872333A (en) | The measuring method and measuring system of a kind of fabric face intrinsic permeability | |
| CN204807158U (en) | Flow measuring device of rock core displacement experiment | |
| CN115248177A (en) | Method and device for measuring breakthrough pressure of low-permeability rock based on optical fiber sensing | |
| CN110927044A (en) | Testing device and testing method for out-of-plane permeability of fiber reinforced composite prefabricated part | |
| CN102937561B (en) | Determination method for orthogonal non-woven three-dimensional rectangular fabric permeability |
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 | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: Tianjin Municipal Synthetic Material Industrial Institute Assignor: Tianjin Polytechnic University Contract fulfillment period: 2008.12.8 to 2015.12.8 contract change Contract record no.: 2009120000214 Denomination of invention: Method for testing external permeability of fibre fabre surface Granted publication date: 20070321 License type: Exclusive license Record date: 2009.9.21 |
|
| LIC | Patent licence contract for exploitation submitted for record |
Free format text: EXCLUSIVE LICENSE; TIME LIMIT OF IMPLEMENTING CONTACT: 2008.12.8 TO 2015.12.8; CHANGE OF CONTRACT Name of requester: TIANJIN SYNTHETIC MATERIAL INDUSTRY RESEARCH INSTI Effective date: 20090921 |
|
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070321 Termination date: 20100225 |