Separate Hopkinson rod tension/compression-torsion dynamic compound loading device and operation method

Abstract

The invention discloses a separate Hopkinson rod tension / compression-torsion dynamic composite loading device and an operation method, belonging to the technical field of multi-axis dynamic experiment testing. The device includes an incident rod, a torsional loading device, a tension / compression loading device, a clamping fastening mechanism and a synchronous release mechanism; Stretch / compression and torsional strain energy are stored in different positions respectively, and the designed synchronous release device is used to realize the instantaneous synchronous release of tension / compression and torsion energy; also through the distance difference between the two clamping and fastening mechanisms, It makes up for the asynchronous loading caused by the inconsistency of longitudinal wave and shear wave velocity, and realizes the synchronous loading of normal stress and shear stress. The invention can be realized based on the simple transformation of the traditional Hopkinson bar, and the cost is low; it also solves the defect that the traditional Hopkinson bar is difficult to carry out synchronous composite loading, and can be used for the experimental test of the dynamic multi-axis mechanical properties of materials.

Description

Technical field [0001] The present invention belongs to the field of multi-axis dynamic experimental testing technology, specifically a separate Hopkinson rod pull / pressure - torsion dynamic composite loading device and operating method. Background [0002] In actual engineering, the service environment of materials is often very complex, so the study of the mechanical behavior of materials under complex stress conditions has become a hot topic in related fields, which is of great help to fully understand the properties of materials, and is also of great significance to the rational use and optimization of materials. Typically, under complex loading conditions (i.e., complex stress states), the response, deformation, and failure patterns of the material exhibit characteristics that are significantly different from those in simple loading conditions. However, the currently commonly used dynamic experimental device (Hopkinson rod device) can only obtain the mechanical response of...

AI Technical Summary

Problems solved by technology

[0006] In order to solve the problem that the existing separated Hopkinson rod cannot realize the tension / compression-torsion compound dynamic load test due to the asynchrony of the transverse wave and the longitudinal wave, the present invention provides a separated Hopkinson rod tension / compression- Torsional dynamic compound loading device and operation method

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