Device and method for hoop tensile test based on laser impact biaxial loading

Abstract

The invention relates to a material dynamic tensile mechanical property test and belongs to the technical field of a material dynamic tensile mechanical property test. By using an intense laser pulse-induced impact wave as a loading condition, the material achieves a high strain rate; and different strain rates can be loaded by changing the laser pulse width and laser energy. A device comprises ahigh-power pulse laser (13), a laser head A (1), a laser head B (01), a restraining layer A (3), a restraining layer B (31), an absorbing layer A (4), an absorbing layer B (41), a loading rod A (6), a loading rod B (9), a cylindrical driving ring (8), a laser interferometer (10), a trigger A (11), a trigger B (110) and a computer (12). The device provided by the invention can be used for researching the dynamic tensile property of the material under the condition of different strain rates. The loading process is simple, the influencing factors are few, the calculation process is simple and the test cost is low.

Description

technical field [0001] The invention relates to the technical field of material dynamic tensile mechanical performance testing, in particular to a method and device for testing hoop tensile performance of materials loaded by laser shock. Background technique [0002] In a series of practical problems in a wide range of fields such as engineering technology, military technology and scientific research, and even in daily life, people will encounter various problems of explosions and impact loads, and it can be observed that objects in The mechanical responses under explosion and impact loads are often significantly different from those under static loads. Understanding the mechanical responses of materials under impact loading conditions will greatly contribute to the engineering applications and engineering designs of these materials. In addition, numerical simulation has played an important role in engineering design, and the premise of numerical simulation must first establ...

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Problems solved by technology

[0003] Among them, the expansion ring technology is an important technology for one-dimensional high strain rate tensile loading to measure the dynamic properties of materials, and the traditional loading methods of the expansion ring technology are mainly through block impact, explosive detonation and electromagnetic drive. Larger, difficult to control and easy to cause pollution, electromagnetic drive is extremely inconvenient in the test of insulator materials, and the above method makes the material produce a relatively low strain rate, the strain rate is difficult to control, and the loading method is complicated, and the influencing factors Many, complex calculation, high test cost, high risk

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