Auxiliary test device for large strain cyclic tension and compression test

Abstract

The invention provides a large-strain circulation tension compression test auxiliary testing device which comprises a carrying mechanism and a clamping mechanism assembly, wherein the clamping mechanism assembly comprises a mobile clamping mechanism and a fixed clamping mechanism, the carrying mechanism comprises a first carrying part and a second carrying part, the first carrying part and the second carrying part are respectively connected with the mobile clamping mechanism and the fixed clamping mechanism, and the first carrying part is connected with the second carrying part. The large-strain circulation tension compression test auxiliary testing device disclosed by the invention can clamp a test sample by a lateral supporting plate, can improve a cover area to the maximum limit, can leave compression margin of the test sample in principle and namely can clamp a residual part of the test sample; thus, instability prevention capacity is greatly improved.

Description

technical field [0001] The invention relates to a thin metal sheet forming test device, in particular to an auxiliary test device for a large strain cycle tension and compression test. Background technique [0002] With the increasing consumption of natural resources and the deterioration of the ecological environment, energy conservation and emission reduction has become an issue that must be faced in the automotive field. The development of lightweight materials, especially the emergence of high-strength steel and ultra-high-strength steel has brought hope to solve this problem. This is because high-strength steel and ultra-high-strength steel can greatly reduce the structural weight on the premise of ensuring structural strength, and the manufacturing cost is significantly lower than that of magnesium-aluminum alloy and composite materials. [0003] The methods used to study the formability of ordinary steel plates are also applicable to high-strength steel plates, and o...

AI Technical Summary

Problems solved by technology

On the one hand, when manually adjusting the 12 springs, it is difficult to ensure that their compression and supporting force are the same, so that it is difficult to ensure uniform gaps and accurate positioning; on the other hand, the structure of the device makes it suitable for clamping high-strength steel and ultra-high-strength steel materials. It is easy to lose stability when held, and even cause damage to the device, so it cannot be applied to the compression test of high-strength plates; moreover, although the upper and lower comb structures can balance the friction generated in the tension-compression test, due to lack of lubrication, it will inevitably damage the test piece. sample surface

In addition, in recent years, other devices to achieve similar functions have also been proposed, but it is often difficult to achieve both the accuracy of the experimental results and the simplicity of the experimental operation.

Moreover, auxiliary devices that can realize large-strain compression experiments on plates are even rarer.

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