Explosive charge test piece wall pressure monitoring test device

Abstract

The invention discloses an explosive charge test piece wall pressure monitoring test device, which comprises a test piece, a sleeve, an upper shot post, a middle shot post, a lower shot post and a base. In the present invention, stepped threaded through-holes are respectively processed at different positions of the middle striking post, the lower striking post and the sleeve for installing sensors, so as to realize the simultaneous monitoring of the mechanical response of the explosive charge in the axial direction and side during the impact compression process, The pressure measuring end surface of the sensor is in direct contact with the explosive charge, which can truly reflect the mechanical response characteristics of the different wall surfaces of the explosive charge.

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...

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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, the Proceedings of the 2013 Mechanics Measurement Technology Symposium "Research on the Stress Test Method of Explosive Charges Under the Impact of Dropping Hammers" discloses a stress response test method for explosive charges under impact. In this method, the stress sensor They are installed on the top and bottom of the test device respectively, but they are not 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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