Apparatus and method for natural acceleration test of composite solid propellant

Abstract

A compound solid propellant natural acceleration test device and method, comprising a rectangular test box, the test box includes a box body and a box cover, a forced ventilation cooling system is provided on one side of the box body, and a temperature and humidity control and data acquisition system is installed outside the box body , There is a sample holder in the box. The composite solid propellant natural acceleration test device of the present invention can be placed outdoors in the tropical marine atmospheric environment, and placed obliquely at the local latitude angle to achieve the best heat absorption effect, realize the simulation and strengthen the solar radiation heat effect and the impact effect of the temperature difference between day and night, Maintain the ambient temperature day and night temperature cycle, seasonal temperature cycle, so as to truly, accurately and quickly obtain the change law of the mechanical properties of the composite solid propellant.

Description

technical field [0001] The invention relates to an accelerated test device, in particular to a natural accelerated test device for composite solid propellants. The invention also relates to a natural accelerated test method of the composite solid propellant. Background technique [0002] Composite solid propellant is an energetic composite material based on a polymer. It has specific properties and is the energy source of a solid rocket motor. thrust. During the storage process of composite solid propellants, due to the combined effects of complex physical and chemical factors, the binder polymer may undergo reactions such as post-curing, oxidative cross-linking, and chain scission, and its performance will gradually change and fail to reach It is the key material and weak link that limits the storage life of the engine. Since the composite solid propellant has the characteristics of difficult replacement, difficult maintenance and high maintenance cost, once failure such...

AI Technical Summary

Problems solved by technology

Although the test method of storing samples in the warehouse can obtain relatively real and reliable test results, the test cost is high and the cycle is long, which is difficult to meet the requirements of development, test and rapid evaluation

Although the laboratory accelerated test method has the advantages of short test period and good reproducibility, due to the difference between the accelerated test conditions and the actual storage environment load, for example, when missiles are stored in land warehouses and warship cabins, and when they are on duty outdoors, there will be Experience the severe temperature difference between day and night, the diurnal temperature difference in sunny days, cloudy days and rainy days, and the seasonal temperature difference changes in spring, summer, autumn and winter, so that the composite solid propellant will expand and shrink repeatedly, and cracks, embrittlement, sweating, crystallization, etc. However, the accelerated test conditions in the laboratory cannot accurately simulate these temperature impact effects, resulting in poor consistency between the extrapolated results of the accelerated test and the actual storage performance changes.

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