Novel support device of split Hopkinson pressure bar and adjustment method of support device

Abstract

The invention relates to a novel support device of a split Hopkinson pressure bar and an adjustment method of the support device. The support device comprises a first support plate and a second support plate, wherein the second support plate is located above the first support plate and is parallel to the first support plate; a vertical screw rod is fixedly connected with the middle of the upper end face of the first support plate and sleeved with a rotatable adjustment block moving up and down; the second support plate is provided with adjustment bolts in a penetrating manner; the lower ends of the adjustment bolts push against the upper end face of the adjustment block to slightly adjust the height of the second support plate; and a groove for supporting a bar in a split Hopkinson pressure bar system is formed in the middle of the upper end face of the second support plate. The invention further relates to the adjustment method of the novel support device of the split Hopkinson pressure bar. The support device is simple in structure; the adjustment method is concise and easy to master; the adjustment time is saved; the split Hopkinson pressure bar can be effectively supported; when the split Hopkinson pressure bar is tested, collision faces are combined well; and obtained experimental data is high in accuracy, actual and reliable.

Description

technical field [0001] The invention relates to a support device of a novel Hopkinson compression bar and an adjustment method thereof. Background technique [0002] The SHPB (Hopkinson pressure bar) experimental device is the impact loading device used in the current experiment. The SHPB experimental device can launch projectiles at high speed and impact the test material to load. The SHPB experimental test system usually consists of an incident rod, a transmission rod, an energy-absorbing rod, and The impact force is applied to the incident rod after the projectile collides with the incident rod. The impact force passes through the incident rod, the test piece, and finally spreads to the absorbing rod. The buffer device installed at the rear end of the absorbing rod is to Force buffering and absorption; in the SHPB system, the incident, transmission, and energy-absorbing rods all need to be supported by the supporting device. When the gap is too large or the impact surfac...

AI Technical Summary

Problems solved by technology

[0002] The SHPB (Hopkinson pressure bar) experimental device is the impact loading device used in the current experiment. The SHPB experimental device can launch projectiles at high speed and impact the test material to load. The SHPB experimental test system usually consists of an incident rod, a transmission rod, an energy-absorbing rod, and The impact force is applied to the incident rod after the projectile collides with the incident rod. The impact force passes through the incident rod, the test piece, and finally spreads to the absorbing rod. The buffer device installed at the rear end of the absorbing rod is to Force buffering and absorption; in the SHPB system, the incident, transmission, and energy-absorbing rods all need to be supported by the supporting device. When the gap is too large or the impact surface is not completely matched, the experiment will produce a large error or even a mistake. At present, the Hopkinson pressure bar support device usually uses gaskets to adjust its height, and the bottom surface uses bolts to adjust its left and right joint surfaces. Difficult to adjust in place, wastes a lot of experiment time, and has low precision

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