Test device for monitoring explosive-loaded test piece wall surface pressure

Abstract

The invention discloses a test device for monitoring explosive-loaded test piece wall surface pressure. The device comprises a test piece, a sleeve, an upper impact column, a middle impact column, a lower impact column and a base. Stepped threaded through holes are machined in different positions of the middle impact column, the lower impact column and the sleeve respectively and used for mounting sensors, so that axial and lateral mechanical responses of a loaded explosive can be monitored simultaneously during impact compression; pressure measuring end surfaces of the sensors are directly contacted with the loaded explosive, so that mechanical response characteristics of the loaded explosive in different wall surface positions can be truly reflected.

Description

technical field [0001] The invention belongs to the technical field of propellant and explosive laboratory test devices, and relates to a propellant and explosive wall surface pressure monitoring test device, in particular to a test device for monitoring the stress at different wall surfaces of an explosive charge test piece during impact compression. Background technique [0002] The interior of the projectile is filled with high-energy explosives. During service (launch, penetration, etc.), the explosives are compressed by inertial shocks. The response of the explosives is firstly a dynamic response, which in turn affects its initiation properties and detonation performance. Therefore, the explosives The monitoring of the mechanical response of the charge during the impact compression process has become one of the key issues concerned by the weapon development department. [0003] At present, large-scale drop weight loading devices, low-velocity gas cannon simulation exper...

AI Technical Summary

Problems solved by technology

However, in these experiments, only the indirect measurement of the axial mean stress was used for the explosive charge to characterize the mechanical response of the explosive charge during shock compression, and the lateral stress of the explosive charge specimen was not monitored

For example, "Research on the Stress Test Method of Explosive Charges under the Impact of Dropping Hammers", a collection of papers of the 2013 Mechanics Measurement Technology Academic Exchange Conference, 2013. A stress response test method for explosive charges under impact is disclosed. In the method, the stress sensors are respectively installed on the upper part and the bottom of the test device, but none of them are in direct contact with the end surface of the explosive. The measured stress is transmitted through multiple interfaces, which cannot truly reflect the mechanical response characteristics of the explosive charge wall.

Especially with the emergence of new charging methods such as step-by-step pressing, since the charging process itself determines that there is a large density difference in different parts of the explosive charge, the axial average stress cannot represent the real mechanical response characteristics of the explosive

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