Loading device and loading method for dynamic biaxial compression of solid propellant

Abstract

The invention relates to the technical field of material mechanical property tests, in particular to a loading device and a loading method for dynamic biaxial compression of a solid propellant. The loading device comprises an upper clamp and a lower clamp which are connected in a matched mode, the upper clamp comprises an upper clamp body and an upper loading table, and a disc-shaped upper pressing disc is fixedly connected to the upper loading table; the lower clamp comprises a lower clamp body and a lower loading table, and the lower loading table is fixedly connected with a bottom fixing sleeve seat; and the upper clamp body and the lower clamp body are buckled with each other, and the area between the upper clamp body and the lower clamp body is a clamping area. According to the clamp designed by the invention, biaxial compression loading test such as dynamic loading with the loading ratio of 1: 1, and the strain rate covering 1-100S <-1 > can be realized on a high-strain-rate hydraulic servo testing machine. The clamp is in micro contact with the surface of the test piece through a suspension structure composed of a double-hole wire locking device and a thin rope, direct operation on a test piece is avoided, and prestress and damage caused by the dead weight of a fixed test piece and the clamp are reduced.

Description

technical field [0001] The invention relates to the technical field of material mechanical performance testing, in particular to a loading device and a loading method for dynamic biaxial compression of solid propellants. Background technique [0002] At present, the test methods involved in the test standards for the mechanical properties of solid propellant materials mainly include quasi-static uniaxial tension and compression test methods with relatively mature test systems, and there is still a lack of methods for testing the mechanical properties of solid propellants under dynamic biaxial compression loading. Effective test method. However, the mechanical properties of solid propellants are not only significantly affected by strain rate change factors, but also by stress state factors, and there are obvious differences between uniaxial and biaxial mechanical properties. Therefore, in order to accurately grasp the mechanical properties of propellants under dynamic biaxia...

AI Technical Summary

Problems solved by technology

However, the testing machine cannot directly cooperate with the test piece to realize the biaxial mechanical performance test of the material, so a new test fixture is needed to be used with the testing machine to carry out the research on the mechanical properties of the solid propellant material under biaxial high-speed compression

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