Vacuum explosion-proof equipment for explosive material Hopkinson bar test

Abstract

The invention discloses vacuum explosion-proof equipment for an explosive material Hopkinson bar test. The vacuum explosion-proof equipment comprises a transmission bar, a cover plate, an explosion-proof box, an explosive sample, an incidence bar, bar sleeves, a fixed frame, a bar sleeve sealing ring, a bar sealing ring, a buffering device, a cover plate sealing pad, a window cover plate and an exhaust tube, wherein the explosion-proof box is a box body consisting of front, back, left and right side surfaces and a bottom surface; an opening is formed in the upper end of the box body, and an outer flange is arranged at the opening; a central rectangular opening is formed in each of the front and back side surfaces of the explosion-proof box; a central circular opening is formed in each of the left and right side surfaces of the explosion-proof box; one bar sleeve is mounted in the circular opening in each of the left and right side surfaces of the explosion-proof box; the transmission bar is mounted in a circular through hole of the bar sleeve on the left; the incidence bar is mounted in a circular through hole of the bar sleeve on the right. The vacuum explosion-proof equipment disclosed by the invention is free of impact waves caused by explosion of an explosive material and also can prevent backward movement of an input bar so as to protect a test system.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive laboratory test devices, and relates to a vacuum explosion-proof device, in particular to a vacuum explosion-proof device suitable for Hopkinson rod tests. Background technique [0002] Explosives must withstand vibration and shock during production, processing, transportation, and storage; when used in armor-piercing, ground-penetrating and other attack weapons, they must withstand dynamic loads with high loading rates; , the impact load of projectiles or fragments, etc. In these processes, the response of explosives firstly manifests itself as a kinetic response, which in turn affects its initiation properties and detonation performance. In order to improve the safety of explosives under different conditions, it is necessary to study the dynamic mechanical properties of explosives under high strain rate dynamic loading. [0003] The Hopkinson rod can measure materials in 10 2...

AI Technical Summary

Problems solved by technology

Due to the particularity of energetic materials, they may burn or even explode under impact, which may damage the Hopkinson bar test system and related test devices, and even cause injury to test personnel. Necessary protection is required during the experiment

A steel protective box is reported in the literature "Research on the Compressive Mechanical Properties and Constitutive Relations of an Aluminum-Containing Explosive" (Energetic Materials, October 2007, Volume 15, Issue 5, Page 460), which is mainly used for To prevent the accidental explosion of the test from causing harm to personnel and instruments, but there are two shortcomings: first, in the confined space, the shock wave generated after the explosion of the explosive is reflected many times, its destructive power is enhanced, and it is easy to cause damage to the protective box; Second, the shock wave generated after the explosion of the explosive will have an impact on the guide rod, which is easy to damage the test system

Images