Clamp improving bending and interlaminar shearing test efficiency of composite material

Abstract

The invention provides a clamp for improving bending and interlaminar shearing test efficiency of a composite material, which comprises a supporting device connected with a mechanical property test machine and a regulating platform arranged on the supporting device, and is characterized in that: (1) the regulating platform slides left and right along a slideway on the upper surface of the supporting device; (2) both sides of the bottom part of a span regulating mechanism have a boss, the bosses on the two sides are clamped on the two sides of the regulating platform, and a positioning pin hole is formed in the middle of the span regulating mechanism and is matched with a positioning pin on the regulating platform; and (3) two sliding blocks which can move towards each other are arranged on the span regulating mechanism, the symmetrical centerline of the two sliding blocks is centered with the centerline of the regulating platform, and supports are arranged on the two sliding blocks. The clamp has a unique structure, can ensure the centerline of the pressure head of the test machine is centered with the centerline of the supports and make the regulation and measurement of the span for test convenient and the replacement of supports of different specifications convenient, is high in precision and convenient for regulation and can improve test efficiency.

Description

technical field [0001] The invention relates to a fixture for improving the efficiency of bending and interlayer shearing tests of composite materials, belonging to the technical field of product structures. Background technique [0002] Composite bending tests and interlaminar shear tests generally use rectangular strip specimens to test the corresponding performance by three-point bending loading. Bending and interlaminar shear properties are important assessment indicators in the process of material selection, design and production application of composite materials. During the test, the tester needs to first adjust the span of the test fixture according to the thickness of the sample. Due to the variety of composite materials and the large difference in sample thickness, it is necessary to frequently adjust the span of the test fixture during the test. However, it is difficult to accurately position the original test fixture when adjusting the span, and it often needs t...

AI Technical Summary

Problems solved by technology

Due to the variety of composite materials and the large difference in sample thickness, it is necessary to frequently adjust the span of the test fixture during the test. However, it is difficult to accurately position the original test fixture when adjusting the span, and it often needs to be repeated many times to adjust it accurately. span, which affects test efficiency

And when conducting high and low temperature tests, the testing machine needs to be connected with an extended connecting rod. Due to the assembly gap, the centerline of the indenter of the test fixture is not aligned with the centerline of the support, and the space of the high and low temperature environment box and the test tools are limited Restrictions make span adjustment more time-consuming and affect test efficiency

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