Clamp for testing shear performance of composite material

Abstract

The invention discloses a clamp for testing the shearing performance of a composite material. The clamp comprises an upper pressing block (1), a lower pressing block (2), a left wedge-shaped locking block (4), a right wedge-shaped locking block, a left fastening bolt, a right fastening bolt (8), a V-shaped notched beam sample (9), an upper clamping bolt (10), a lower clamping bolt (11), an upper centering device (12), a lower centering device (13), an upper guide rail column (14), a lower guide rail column (16), an upper loading rod (15) and a lower loading rod (17). According to the clamp disclosed by the invention, the V-shaped notched beam sample is simple and convenient to assemble and disassemble through left and right rectangular holes (205), and the clamp is suitable for V-shaped notched beam samples with different sizes through a combined clamping mode of the left and right wedge-shaped locking blocks and the upper and lower rectangular gaskets, and has relatively strong adjustability.

Description

technical field [0001] The invention relates to a fixture for testing the shear performance of composite materials, which belongs to the technical field of performance testing of composite materials. Background technique [0002] At present, for the experimental research on the shear performance of composite materials, the orbital shearing method (including double orbital shearing method and triple orbital shearing method), Iosipescu shearing method, V-notch orbital shearing method, etc. are mainly used. Among them, the Iosipescu shear method is widely used in the field of shear performance testing of composite materials because the test method is simple and easy to operate, the required V-notch beam sample is easy to process, and the test results of the sample are relatively ideal. Applied and formulated into test standard ASTM D5379. This test standard describes a fixture specially used to test the shear performance of composite V-notch beam specimens. The load is applied...

AI Technical Summary

Problems solved by technology

b class="d_n"> [0008] The purpose of the present invention is to solve the difficulties of accurate positioning and centering of the existing fixture along the thickness direction of the V-shaped notch beam sample during use, the complicated disassembly and assembly of the sample and the large The load produces bending deformation, which causes the sample to produce a complex stress state problem in which bending and shearing act simultaneously. A fixture for testing the shear performance of composite materials is proposed

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