Shock wave time calibration device and method for shock test

Abstract

The invention relates to the technical field of impact compression loading, in particular to a shock wave time calibration device and method for a shock test. The calibration device comprises a controllable high-speed emitting device, a target chamber and a signal collecting device, wherein the target chamber is a vacuum target chamber; an experiment target is arranged in the target chamber; the experiment target comprises a substrate, a fixed column, an optical probe and an electric probe; a light-emitting gap is formed between the substrate and the fixed column; the optical probe and the electric probe are connected with the signal collecting device; and the controllable high-speed emitting device is used for driving a flyer to impact the left side wall of the substrate. According to thecalibration device and method, two waveforms generated according to signals detected by the electric probe and the optical probe are comparatively analyzed, and a more accurate waveform data graph isselected to finally judge a time point when a shock wave enters a sample, so that an important parameter, namely, the time point when the shock wave enters the sample can be more accurately calibrated, and follow-up experiment data is more reliable and effective.

Description

technical field [0001] The invention relates to the technical field of shock compression loading, in particular to a shock wave time calibration device and a time calibration method for shock tests. Background technique [0002] Dynamic ultra-high pressure technology and its theory were developed and matured in the late period of World War II. Its task is usually to study the mechanical properties of solid targets under dynamic ultra-high pressure conditions. [0003] When an extremely strong shock wave (shock wave) propagates in a medium (mainly referring to a solid), it will cause a sharp change in the state parameters of the medium such as pressure, density, and temperature. This state is called a dynamic ultra-high pressure state, and the technology of generating strong shock waves is called a dynamic ultra-high pressure technology. Dynamic ultra-high pressure technology is used in the measurement of the equation of state, artificial synthesis of new materials (such as...

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Problems solved by technology

The artillery device is simple, but due to the limited peak pressure that the powder chamber can withstand when the powder is ignited, the average pressure allowed at the bottom of the artillery projectile generally does not exceed 150MPa, so the speed adjustment range of the projectile is very small, only 1km / s~2km / s

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