Minitype dynamic pulling-pressing experiment system with preload

Abstract

The invention discloses a minitype dynamic pulling-pressing experiment system with preload, and relates to a minitype experiment system which can carry out dynamic tension on materials such as film or fibre and can perform dynamic compression on small block test specimens such as explosive single crystals, and belongs to the technical field of dynamic impact experimental mechanics. An improved Hopkinson pressure lever device and a minitype Kolsky pressure lever device are ingeniously combined on an experiment platform through a pressure pulling common variable cross-section trip rod with an optimized design, the film or a fiber material test specimen to be detected is tensioned in advance through the designed preloading device, and an error in stress wave one-dimensional transmission of an experiment is reduced; and a magnetic resistance type coil launcher is combined with a cylindric pill launcher, a simple two-rod piece system and the preloading device, and namely, the dynamic tension and dynamic impact experiment is realized. The minitype dynamic pulling-pressing experiment system provided by the invention has the advantages that the structure is compact, the use is convenient, and the minitype dynamic pulling-pressing experiment system is suitable for dynamic tension mechanical property research.

Description

technical field [0001] The invention relates to the field of dynamic impact test mechanics, in particular to a miniature dynamic tension-compression test system with preload. Background technique [0002] In many cases, such as the bumping and impact of automobiles, the launch of spacecraft, etc., materials or structures are often subjected to dynamic loads, especially the mechanical response under impact loads is an important mechanical performance parameter of materials. The separate Hopkinson bar (Hopkinson) dynamic mechanical testing system can successfully test the dynamic compression and tensile properties of materials. The mechanical properties of materials under two opposite high strain rate loads are of great significance to the application of materials. At the same time, the dynamic performance test of micro-specimen is also becoming a new demand. However, usually separate dynamic compression experiments and tension experiments need to be carried out on different ...

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Problems solved by technology

[0005] The purpose of the present invention is to provide a preloaded miniature dynamic tension-compression test system to solve the problem of influence on stress wave propagation in t

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