Initiative confining pressure test system suitable for explosives and solid propellant materials

Abstract

The invention discloses an initiative confining pressure test system suitable for explosives and solid propellant materials. The system consists of a load loading system, a deformation measurement system, a temperature control system and an interpersonal interaction system, wherein the load loading system comprises a confining pressure loading system and an axial loading system; the deformation measurement system is capable of realizing a synchronous measurement function for the axial and radial deformation of samples through a special tooling; the temperature control system is capable of realizing accurate warming and heat preservation control under different temperatures from environmental temperature to high temperature through heating the hydraulic oil in a confining pressure chamber and carrying out control by adoption of a PID; and the interpersonal interaction system is mainly used for displaying and recording the confining pressure, axial load, temperature and deformation testdata and sending instructions to the load loading system and the temperature control system. The system is capable of obtaining the stress-strain relation curves and strength fracture data of the explosives and solid propellant materials under different temperatures and different confining pressure environments and the long-time creep data under complicated stress.

Description

technical field [0001] The invention relates to the field of testing the mechanical properties of explosives and solid propellant materials, in particular to an active confining pressure test system suitable for explosives and solid propellant materials. Background technique [0002] In order to accurately establish the constitutive model and strength criterion of explosives and solid propellant materials, and evaluate the mechanical properties of explosives and solid propellants with high precision, the tensile and compressive mechanical properties of explosives and solid propellant materials under confining pressure have been tested to important. At present, the mechanical tests of explosives and solid propellants under confining pressure are still limited to passive confining pressure samples, that is, a metal sleeve is placed on the surface of the sample to perform uniaxial compression tests, and the size of the confining pressure is determined by the metal sleeve. The ...

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Problems solved by technology

On the one hand, this method cannot accurately obtain the size of the confining pressure. On the other hand, the confining pressure has been increasing continuously during the loading process, and it is difficult to artificially control the size of the confining pressure. Therefore, it is urgent to develop an active confining pressure for explosives and solid propellants Tensile compression test method

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