A quasi-static uniaxial compression test method and device

Abstract

The invention discloses a quasi-static uniaxial compression experiment method and device for a compression test piece with a groove structure. The experimental device includes a compression fixture and a test piece. The compression fixture includes a compression platen at the top, a base support plate and a clamping portion for clamping the test piece; the test piece is a plate-shaped bone-type test piece, and the bone of the test piece There is a groove on one side of the reduced part of the profile; the top end of the test piece rests on the compression platen, the bottom end of the test piece rests on the base support plate, and the clamping part avoids the groove and is clamped on the upper and lower ends of the test piece . The invention also discloses an experimental method using the experimental device, according to the mechanism of moment balance between the bending moment and the normal force exerted by the back anti-bending plate on the groove part to suppress the buckling of the specimen, only in the The back side is supported laterally, while the groove on the front side is exposed, which is suitable for various strain measurements, and solves the problems of complicated processing technology, high cost, and difficult data measurement of the existing quasi-static uniaxial compression device.

Description

technical field [0001] The invention relates to the field of metal materials, in particular to a quasi-static uniaxial compression test method and device. Background technique [0002] For lightweight metallic materials such as Al-Mg alloys, uniaxial compression properties are important mechanical parameters because they usually exhibit strong tension-compression asymmetry. Therefore, it is crucial to develop test methods such as uniaxial compression or cyclic tension-compression. However, determining the compressive properties of thin sheet materials has been a long-standing challenge. Because when a compressive load is applied to a thin sheet material, it tends to buckle before true compressive failure occurs. [0003] Current standard test methods for uniaxial compression of metals, composites, and plastics include ASTM E9, ASTM E209, ASTM D3410, ASTM D6641, and ASTM D695. Typically, a maximum compressive strain of 0.10 can be achieved using these standard methods. To...

AI Technical Summary

Problems solved by technology

According to the above-mentioned technical problems such as complex processing technology, high cost, small plastic compression strain range and difficult data measurement in the process of uniaxial compression proposed above, a simple structure, easy to use and low cost are provided for the uniaxial compression design of metal sheets. Cost-effective experimental device, that is, quasi-static uniaxial compression experimental method and device

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