Tensile-shear compressive-shear complex loading tester

Abstract

This invention relates to one pulling and pressing shearing test device and structure force test device, which comprises the following parts: four pieces of shearing and pulling and pressing loading boards; one rectangle loading frame; two L-shape lever symmetrically hinged with each other and fixed on the rectangle loading frame one catercorner, wherein the L-shape lever is separately loaded with pulling and pressing holes. The test device can realize the compound test on the same one test device of general test machine.

Description

technical field [0001] The tension-shear-compression-shear composite loading test device of the invention belongs to the field of structural experiment mechanics. Background technique [0002] In aeronautical, aerospace, and marine engineering structures, flat plates and stiffened plates are typical stressed members, and they are all in a state of unidirectional tension, compression and shearing. Stability and strength under stress are important research topics in structural mechanics. Especially in the design of modern aircraft, it is necessary to study the strength of thin-walled structures such as skins under complex loads. It is urgent to realize this load state in the laboratory to assess the strength of materials and prepare for the next step of theoretical establishment. . [0003] For a long time, it has been very difficult to realize combined loading of tension-shear and compression-shear for this type of member. At present, it can be realized by multi-channel co...

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Problems solved by technology

[0003] For a long time, it has been very difficult to realize combined loading of tension-shear and compression-shear for this type of member.

At present, it can be realized by multi-channel coordinated loading system or multi-axis testing machine and auxiliary fixtures, but due to the high price of these equipment and the difficulty in the realization process, it is rarely used

[0004] Another method is to realize the tension-shear and compression-shear test of the plate through bending and torsion through the box section composed of the plate and ribs, but this method is suitable for the stability test of the plate, and the test cost is relatively high in the strength test , and cannot achieve satisfactory results

[0005] The current composite compression-shear loading device can only realize the composite stress test of compression and shear, but cannot realize the composite stress test of tension and shear, and the test effect is not good, especially for small-sized specimens

Also not suitable for strength tests

At the same time, if the ratio of pressing and shearing changes, the fixture needs to be replaced, which requires high installation technology, inconvenient use, and high manufacturing cost.

[0006] It is very difficult to realize tensile shear and compressive shear tests of different proportions at the same time on the same test device using the above methods

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