Device for testing dynamic force-electricity coupling performance of material

Abstract

The invention discloses a device for testing the dynamic force-electricity coupling performance of a material, which comprises a stress wave generator, an incident bar and a transmission bar which are coaxially and sequentially connected, and a sample is clamped between the incident bar and the transmission bar; the stress wave generator generates tensile stress waves, the tensile stress waves serve as incident stress waves to be spread along the incident rod and load the sample, one part of the incident stress waves form reflection stress waves in the incident rod, the other part of the incident stress waves enter the transmission rod through the sample to form transmission stress waves, and the sample deforms in the loading process; the data collector collects stress wave signals on the incident bar and the transmission bar; and the calculation module calculates the engineering strain rate, the engineering strain and the engineering stress of the sample according to the stress wave signal, and obtains the real strain rate, the real strain and the real stress of the sample according to the engineering strain rate, the engineering strain and the engineering stress of the sample. According to the invention, the stress-resistivity-strain coupling response relation of the material under dynamic loading can be obtained.

Description

technical field [0001] The invention relates to the dynamic electromechanical coupling testing technology of materials, in particular to a device for testing the dynamic electromechanical coupling performance of materials. Background technique [0002] Engineering materials will often experience severe dynamic loads during their service, such as car impacts, bird impacts on aircraft, and even penetration and armor penetration in the aerospace and defense fields. Mechanistic studies are required. With the development of advanced polymer materials, polymers and their composite materials are widely used in related fields. For example, rubber polymers, one of the typical polymer materials, have excellent mechanical properties such as high specific strength, high toughness, and good fatigue resistance. , are widely used in aerospace, transportation, medical equipment and other fields. Therefore, the research on the dynamic response characteristics and damage of polymer material...

AI Technical Summary

Problems solved by technology

[0003] The main purpose of the present invention is to provide a device for testing the dynamic electromechanical coupling performance of materials, so as to solve the problem that the existing technology cannot realize the in-situ monitoring ability of material damage under high strain rate

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