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Test fixture for testing shear properties of fabrics and coated fabrics

A technology of coated fabrics and test fixtures, applied in the direction of measuring devices, strength characteristics, instruments, etc., can solve problems that affect the authenticity and accuracy of test results, affect the efficiency of sample installation, and the yarn slippage of the clamping part, etc. , to avoid out-of-plane displacement, reduce the deviation of test results, and avoid slippage

Inactive Publication Date: 2018-01-19
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the above-mentioned existing problems, that is, because the softness of the fabric will affect the efficiency of sample installation, the existing test fixture often produces out-of-plane displacement when the sample is installed, and the yarn in the sample clamping part The thread will be deflected, and the clamping force of the sample is not enough to cause the yarn in the clamping part to slip, which will affect the authenticity and accuracy of the test results, and then provide a test fixture for testing the shear performance of fabrics and coated fabrics

Method used

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  • Test fixture for testing shear properties of fabrics and coated fabrics
  • Test fixture for testing shear properties of fabrics and coated fabrics
  • Test fixture for testing shear properties of fabrics and coated fabrics

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specific Embodiment approach 1

[0025] Specific implementation mode one: as Figure 1~Figure 13 As shown, this embodiment discloses a test fixture for testing the shear performance of fabrics and coated fabrics, including an upper end head 1, a slotted connecting rod 2, a lower end head 3, a middle connecting plate 15, four clamping plates, four A magnetic pressing plate 8, a plurality of fixed blocks 9 and two side connecting plates 10, the four clamping plates are respectively clamping plate one 4, clamping plate two 5, clamping plate three 6 and clamping plate four 7 ;

[0026] The slotted connecting rod 2 is provided with a chute 22 along its length direction, and the chute 22 is arranged near one end of the slotted connecting rod 2, and the upper end 1 and the one end of the slotted connecting rod 2 pass through a pin shaft One is hinged, one end of the clamping plate one 4 and one end of the clamping plate four 7 are hinged by the pin two, the two pins are slidably arranged in the chute 22, the other ...

specific Embodiment approach 2

[0028] Specific implementation mode two: as figure 2 , Figure 4 As shown, in the test fixture for testing the shear performance of fabrics and coated fabrics described in Embodiment 1, the upper part of the upper end head 1 is a cylinder, and the middle part of the cylinder outer surface of the upper end head 1 is provided with an upper end along the radial direction. Smooth through hole 11, the middle part of the upper end 1 is a cylindrical boss 1, the outer circular surface of the cylindrical boss 1 is provided with an external thread 12, and the lower end of the upper end 1 is a cylinder with a slot in the middle — 13, two coaxial lower smooth through holes 14 are arranged radially in the middle of the two solid parts of the cylinder — 13 slotted in the middle of the upper end 1;

[0029] The lower part of the lower end head 3 is a cylinder, and the middle of the cylindrical outer peripheral surface of the lower end head 3 is provided with a lower smooth through hole 31...

specific Embodiment approach 3

[0030] Specific implementation mode three: as figure 2 As shown, in the test fixture for testing the shear performance of fabrics and coated fabrics described in the second specific embodiment, the slotted connecting rod 2 is a straight rod, and one end of the slotted connecting rod 2 is provided with a connecting through hole 21 in the middle. Cylinder (the connecting through hole 121 of the slotted connecting rod 2 is hinged with the two lower smooth through holes 14 of the upper end 1 through the pin shaft 1), the other end of the slotted connecting rod 2 is rounded, and the slotted connecting rod 2 A connecting through hole 2 23 is opened in the middle part of the other end.

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Abstract

Belonging to the technical field of test fixtures, the invention provides a test fixture for testing the shear properties of fabrics and coated fabrics. Specifically, an upper end is hinged to one endof a slotted connecting rod through a pin 1, a clamp plate 1 is hinged to a clamp plate 4 through a pin 2, the pin 2 is slidably disposed in the sliding slot of the slotted connecting rod, the clampplate 1 is hinged to a clamp plate 2 through a pin 3, the clamp plate 4 is hinged to a clamp plate 3 through a pin 4, the clamp plate 2, the clamp plate 3 and the slotted connecting rod are hinged through a pin 5, the clamp plate 2 is disposed between two side connecting plates, and are hinged to the two side connecting plates through a pin 6, the clamp plate 3 is hinged to a middle connecting plate through a pin 7, the middle connecting plate and the two side connecting plates are hinged to a lower end through a pin 8, magnetic pressing plates are installed in the grooves of the clamp plate 1, clamp plate 2, clamp plate 3 and clamp plate 4 in a matching way, each magnetic pressing plate is compressed and fixed through a plurality of fixed blocks, and the plurality of fixed blocks are in detachable fixed connection with the clamp plates. The test fixture provided by the invention can be used in tests for testing the shear properties of fabrics and coated fabrics.

Description

technical field [0001] The invention relates to a fabric shear test jig, which belongs to the technical field of test jigs. Background technique [0002] Fabrics and fabric composites are widely used in aerospace, transportation, and civil engineering. The shear performance of fabrics is an important factor affecting fabric draping. The frame shear test is one of the main test methods to study the shear performance of fabrics. One, but there is no unified test standard yet, and the test fixtures used by different laboratories vary greatly, each with its own advantages and disadvantages, even for the same fabric, the test results obtained are not the same. How to realize that the soft fabric can be quickly and stably installed on the test fixture, reduce the result deviation caused by the installation of each test, how to ensure the flatness of the sample when it is installed on the fixture, and avoid The displacement of the sample occurs out of the plane during installation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N3/04
Inventor 谭惠丰罗锡林林国昌陈雪岩
Owner HARBIN INST OF TECH