A five-station solid propellant normal high temperature stress relaxation test device and method

Abstract

The invention provides a five-station solid propellant normal-temperature stress relaxation test device, which includes a temperature control system, a deformation adjustment system, and a multi-channel load recording system. The main structure of the temperature control system is a water-jacketed incubator. There is a base on the bottom surface of the inner cavity. There are five through holes on the upper wall of the box corresponding to the base. A circular bearing platform is set on the top of the box for Install the upper clamping piece, the load sensor, the deformation adjusting nut, and the deformation measuring instrument. The deformation adjustment system is composed of the upper and lower clamping parts of the sample, the deformation adjustment nut, and the deformation measuring instrument. The multi-channel load recorder is used to simultaneously record and save the load / time curves and data of multiple samples during the test. The five-station solid propellant normal-high temperature stress relaxation test device provided by the invention realizes a long-term stress relaxation test of multiple propellant samples under different strain levels in an environment of room temperature to 80°C.

Description

technical field [0001] The invention relates to the field of solid propellant structural integrity and aging performance testing, in particular to a propellant high-temperature and long-term stress relaxation test device and test method. Background technique [0002] In a solid rocket motor, the propellant is subjected to internal stress such as stress load and temperature load, which will inevitably have a certain impact on the structural integrity and aging performance of the propellant. Stress relaxation performance is an important mechanical performance index of composite solid propellants , which is very important for investigating the interaction between polymers or energetic solid fillers and polymers, and the structural integrity of propellant grains. [0003] At present, the stress relaxation tests of solid propellants are mostly carried out on the material testing machine, under normal temperature environment, with a single sample, within a short period of time, et...

AI Technical Summary

Problems solved by technology

[0003] At present, the stress relaxation tests of solid propellants are mostly carried out on the material testing machine, under normal temperature environment, with a single sample, within a short period of time, etc., which has certain limitations, and it is impossible to conduct stress relaxation comparisons under different initial strain conditions at the same time. test, and high temperature, long-term stress relaxation test

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