Hopkinson tension and compression integrated experimental device

Abstract

The invention discloses a Hopkinson tension and compression integrated experimental device. Air filling devices, air cylinders, shooting cannons, shooting cannon control systems and bullets, which are used for tension and compression tests, are two sets of systems independent of each other; a fixed guide rail, an adjustable supporting device, a data acquisition system, an incidence rod, a transmission rod and an absorption device are shared systems; the tension and compression tests can be performed respectively, and the cost can be greatly reduced; by virtue of boss threads, a test piece can be conveniently replaced, an experimental process is further simplified, and the efficiency of a single experiment with large experiment amount is remarkably improved.

Description

Technical field [0001] The invention belongs to the experimental field of material mechanical properties, in particular to a Hopkinson tension-compression integrated experimental device. Background technique [0002] In the process of material mechanics research, we often find that its compression and tensile properties are asymmetrical, and the mechanical properties exhibited by compression cannot be simply applied to the tensile environment. In this way, it is necessary to build experimental devices that can study the tensile properties of materials. At present, independent experimental devices are Hopkinson pressure bar and Hopkinson draw bar. If two experimental devices are built at the same time, the cost is very high and takes up space and resources. Therefore, we considered integrating the two experimental devices into one experimental device, which not only saves costs, but also saves laboratory space resources. [0003] The tension-compression integrated Hopkinson bar de...

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Problems solved by technology

Due to the inconsistency of the rod section, The effect of the hole in the transmission rod and the friction between the specimen and the rod make it difficult to satisfy the above conditions

The literature "Nicholas.T: Tensile testing of materials at high rates of strain. Exp. Mech, 21:177–185(1980)" has greatly improved the one-dimensionality and uniformity of wave propagation in rods, and basically It is guaranteed that the part of the compression wave introduced into the sample will not cause plastic deformation of the sample, but the processing and experiment process are relatively cumbersome, and it is not suitable for research with a large amount of experiments

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