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Three-point and four-point flexural fatigue general test fixture for composite material

A composite material, four-point bending technology, applied in the direction of analyzing materials, measuring devices, instruments, etc.

Inactive Publication Date: 2018-04-17
TIANJIN POLYTECHNIC UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the existing conventional fatigue testing machine, the technical problem to be solved by the present invention is to provide a strip-shaped composite material three-point and four-point bending fatigue test fixture, which can ensure that the sample is stably clamped during the test, so that Three-point and four-point bending fatigue experiments were carried out smoothly and accurately

Method used

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  • Three-point and four-point flexural fatigue general test fixture for composite material
  • Three-point and four-point flexural fatigue general test fixture for composite material
  • Three-point and four-point flexural fatigue general test fixture for composite material

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Embodiment Construction

[0015] Further describe the present invention below in conjunction with example and accompanying drawing.

[0016] A general test fixture for three-point and four-point bending fatigue of composite materials, including a loading part and a supporting part, such as figure 1 and image 3 shown. The loading part includes: loading part panel (screw 1, round head rectangular slot 2, screw hole 3), rectangular hollow square iron 4, screw 5, gasket 6, upper chuck 7, lower chuck 8. The supporting part includes: supporting part bottom plate (stud 9, T-shaped guide rail 10), screw 11, nut 12, base 13, clamping beam 14, screw 15, rectangular hollow square iron 16, sample 17.

[0017] Before the experiment, connect the stud 1 with the screw hole at the loading end of the fatigue testing machine, and connect the stud 9 with the screw hole at the support end of the fatigue testing machine. Then put the strip sample 17 between the upper chuck 7 and the lower chuck 8 of the loading part, a...

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Abstract

The invention discloses a three-point and four-point flexural fatigue general test fixture for a composite material. The three-point and four-point flexural fatigue general test fixture for the composite material belongs to a fixture used for testing mechanical properties of materials, is detachably arranged on the conventional fatigue test machine and carries out three-point and four-point flexural fatigue test. The fixture is divided into a loading part and a supporting part, and the loading part and the supporting part can be connected with a fatigue testing machine in a thread form. The fixture can regulate clamping size according to the size of a sample, domestic and foreign related flexural fatigue test standards are met, and universality is strong. The fixture can guarantee that thesample can be stably clamped in a flexural fatigue testing process without producing slippage, so that an experiment can be accurately and smoothly carried out.

Description

technical field [0001] The invention relates to a fixture for testing the mechanical properties of materials, in particular to a universal test fixture for three-point and four-point bending fatigue of strip-shaped composite materials. Background technique [0002] Nowadays, composite materials are widely used in various engineering fields. Fiber-reinforced composite (FRP) structures are gradually widely used in the infrastructure field due to their low cost. Fatigue damage is one of the main damage forms of structures and components. [0003] Three-point and four-point bending fatigue tests are one of the basic methods for testing mechanical properties of materials. Although conventional fatigue testing machines are widely used, conventional fatigue testing machines can only perform tensile fatigue tests. Since the three-point and four-point bending fatigue test is basically the same as the tensile fatigue test, the fixture part of the conventional fatigue testing machine...

Claims

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Application Information

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IPC IPC(8): G01N3/04
CPCG01N3/04
Inventor 孙颖丁许刘俊岭陈利
Owner TIANJIN POLYTECHNIC UNIV
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