Auxiliary test device for large strain cyclic tension and compression test

An auxiliary test and large strain technology, which is applied in the direction of applying repetitive force/pulse force to test the strength of materials, etc., which can solve the problems of easy instability, damage to the surface of the sample, difficulty in combining the accuracy of the experimental results, and the simplicity of the experimental operation. Achieve the effect of improving the ability to prevent instability, avoiding fracture or instability, and improving the ability to prevent instability

CN107687983BActive Publication Date: 2020-07-14SHANGHAI JIAO TONG UNIV
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
Publication Date
2020-07-14

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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.
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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...

Examples

Embodiment Construction

[0077] The present invention will be described in detail below in conjunction with specific embodiments. The following examples will help those skilled in the art to further understand the present invention, but do not limit the present invention in any form. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention. These all belong to the protection scope of the present invention.

[0078] In order to realize the large strain compression in the plane of the thin plate, ensure the positioning accuracy of the plate, and improve the strength level of the applicable material, the present invention proposes an auxiliary test device for the large strain cyclic tension and compression test. By separating the two sides of the device and Separately adjust to ensure the positioning accuracy of the thin plate; fix the device on the test bench to increase the side clamping force, and then...