Digital laser explosion loading dynamic photoelastic experiment system

Abstract

The invention discloses a digital laser explosion loading dynamic photoelastic experiment system, which comprises a laser, a beam expanding mirror, a field lens combination, a left 1 / 4 wave plate, a right 1 / 4 wave plate, an analyzer, an explosion loading device, an exploder, a digital high speed video camera and a computer. The laser sends out continuous line beams which are converted into circularly polarized light through the beam expanding mirror, a field mirror and the 1 / 4 wave plate to be illuminated on a test sample of the explosion loading device, the circularly polarized light are converged through the right 1 / 4 wave plate, the analyzer and the field mirror to be illuminated into a lens of the digital high speed video camera, and finally, the circularly polarized light is exploded by the exploder and shot by starting the digital high speed video camera to form an explosion loading image. The system record and analyze the broadcast information including process of stress saves in the test sample under explosion loads, stress time and space distribution and the like, an optical path is simple, requirements for experiment environment and experiment cost are low, period is short, precision is high, and continuous observation of the whole fracture process is achieved.

Description

technical field [0001] The invention relates to a dynamic photomechanical experiment device, in particular to a digital laser explosion loading dynamic photoelastic experiment system for studying explosion stress waves. Background technique [0002] The dynamic photoelasticity experiment is an optical measurement method that uses optically sensitive materials to make a model similar to the real object, irradiates it with polarized light under the action of a dynamic load, and directly records the contour of the stress in the model on the bottom plate. It is very intuitive and can directly obtain the propagation and superposition of stress waves in solid media, as well as the instantaneous stress distribution diagram in the dynamic process of the interaction between cracks and stress waves, which can truly reflect the information and laws of the dynamic process. [0003] In the study of dynamic photoelasticity, multi-spark dynamic photoelastic instruments are usually used in ...

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Problems solved by technology

[0005] When working, the above two devices use traditional physical film as the recording medium, which has high requirements for the operation and experience of the experimenters, and the success rate of the experiment is low and the cost is high, which is not conducive to further research.

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