Split Hopkinson bar pressure-torsion dynamic load combined loading device and using method thereof

Abstract

The invention provides a split Hopkinson bar pressure-torsion dynamic load combined loading device and a using method thereof, and belongs to the technical field of split Hopkinson bar experiments. The split Hopkinson bar pressure-torsion dynamic load combined loading device comprises an inner bar, an outer bar, a clamp, a torque loader, a flange, a fastener and a bullet, wherein the section of the inner bar is circular, the first end is a sample end for mounting a sample, the second end is fixedly connected with the flange, and the clamp and the torque loader are sequentially mounted betweenthe first end and the flange; the first end of the outer bar is provided with a bladed impact block with a cutting edge facing the first end of the inner bar, and the second end is fixed on the flange; the clamp is fixed in the circumferential direction and connected with an external rack through the fastener; the fastener is in contact with the cutting edge of the bladed impact block; and the bullet impacts the flange through a bullet driving device. The device is simple in design structure and convenient to operate, and realizes the pressure-torsion combined loading test which cannot be performed in the prior art.

Description

technical field [0001] The invention belongs to the technical field of separate Hopkinson bar experiments, and specifically discloses a separate Hopkinson bar compression torsion load compound loading device and a method for using the same. Background technique [0002] Engineering structures or materials are often subjected to short-term, high-amplitude transient or impact loading. One of the main characteristics of material response under such loading conditions is its high strain rate deformation. In addition, the mechanical properties of materials such as strength , Work hardening and toughness are often significantly different from those under general quasi-static loading conditions. Therefore, understanding and understanding the mechanical response characteristics of materials at high strain rates is of great significance for engineering design and calculation. It is difficult for traditional material testing machines to achieve high-speed loading, and the strain rate...

AI Technical Summary

Problems solved by technology

Most of the existing conventional separate Hopkinson bar test devices are only suitable for single load loading, and cannot realize composite dynamic load tests including compression and torsion

In addition, there is a more advanced electromagnetic Hopkinson rod. Although the electromagnetic Hopkinson rod can theoretically achieve the purpose of composite load loading test through technical design, due to its complicated technology and high cost, there is currently no corresponding composite dynamic load test. device

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