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Photo frame testing device for evaluating in-plane shearing deformation of flexible fabrics and testing method thereof

A flexible fabric and testing device technology, which is applied to measuring devices and uses a stable shear force to test material strength, strength characteristics, etc., can solve the problems of inability to obtain shear stress and shear strain, and reduce frictional force. loss, reduce friction loss

Pending Publication Date: 2018-07-24
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, although the fabric fiber pull-out modeling experiment can obtain the total in-plane shear deformation process of the fabric specimen, it cannot obtain the most important relationship between shear stress and shear strain, which is very important for evaluating the resistance of flexible fabrics. The evaluation of shear deformation ability is of great significance, and it is crucial to further evaluate the softness of bulletproof equipment

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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  • Photo frame testing device for evaluating in-plane shearing deformation of flexible fabrics and testing method thereof
  • Photo frame testing device for evaluating in-plane shearing deformation of flexible fabrics and testing method thereof
  • Photo frame testing device for evaluating in-plane shearing deformation of flexible fabrics and testing method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0036] The flexible fabric in-plane shearing photo frame experiment test device consists of round head ears, pins, bearings, bottom pressing pieces, internal pressing pieces, upper pressing pieces, bolts and other parts. The flexible fabric specimen 1 is clamped 2 by the clamping fixture, and the round head and double ears 4 are connected by the pin 3, and then fixed on the working table of the testing machine by the cylindrical plug structure on the upper part of the round head and double ears. The rolling bearing 5 is fixed on the interface of the round hole where the pin contacts, so that the two clamping sides of the clamping fixture can freely rotate around the pin, and the loss of frictional force is minimized. The clamping fixture itself is divided into four parts: the bottom pressure plate 2a, the inner pressure plate 2b, the upper pressure plate 2c and the pressure bolt 2d. The edge of the fabric specimen is clamped between the bottom pressure plate and the inner press...

Embodiment 2

[0044] Embodiment 2 test method

[0045] A test method for a picture frame test apparatus for the evaluation of in-plane shear deformation of flexible fabrics, comprising the following steps:

[0046] 1) First, carry out the tensile test of the photo frame fixture device. After the installation of the photo frame fixture device is completed, the whole photo frame fixture device is fixedly installed on the testing machine platform by using the round head double-ear plug devices on the upper and lower sides of the device. Set the loading rate of the testing machine to 100mm / min to carry out the tensile test, and record the load-displacement curve of the photo frame device in real time. When the deformation of the photo frame device exceeds the shear deformation of ordinary fabrics, the experiment ends and the experimental data is saved.

[0047] 2) Convert the shear stress-shear strain relationship curve of the photo frame device. Use a specific conversion relationship to conv...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Abstract

The invention discloses a photo frame testing device for evaluating the in-plane shearing deformation of flexible fabrics and a testing method thereof, and belongs to the technical field of mechanicalevaluation of flexible fabrics. The device comprises an insertion bolt, a round head dual-ear, a pin, a bearing, and a clamping tool. The pin is used to connect the round head dual-ear and the fabricclamping tool. A rolling bearing is arranged on the contact surface between the pin and the fabric clamping tool to reduce the friction loss during the test process. The clamping tool is mainly usedto clamp a flexible fabric sample. The test method can obtain detailed relationship between fabric shearing stress and shearing strain. More direct data for evaluating the in-plane shearing performance of flexible fabrics is provided. According to the method, during the process of a flexible fabric trajectory penetration test, the in-plane shearing phenomenon caused by pulling out fibers is testedin a modeling mode, the fabric sample is only processed by a shearing force, moreover, the operation is simple, and the manufacturing cost is low.

Description

technical field [0001] The invention belongs to the modeling test method of the shearing deformation process of the fabric due to the internal shear deformation of the yarn force surface during the ballistic penetration process of the flexible fabric. It specifically relates to a test method for modeling experiment of in-plane shear frame of flexible bulletproof fabric ballistic penetration, which provides an experimental test method for the in-plane shear process caused by fabric stress during ballistic penetration, and includes shear stress-shear The strain transformation calculation method makes it possible to more specifically evaluate the in-plane shear deformation resistance of the flexible fabric, which belongs to the technical field of the mechanical evaluation of the flexible fabric. Background technique [0002] Aramid fiber fabrics are widely used in the field of bulletproof equipment preparation due to their high modulus, high strength, high temperature resistanc...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
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Application Information

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IPC IPC(8): G01N3/24G01N3/04
CPCG01N3/04G01N3/24G01N2203/0025G01N2203/0075G01N2203/0423G01N2203/0282
Inventor 马宇杨佳晟雷振坤白瑞祥房庆超秦福勇冯洋
Owner DALIAN UNIV OF TECH
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