关键词: 固体推进剂;力学性能;压强指数+;压强

Abstract: In order to find out the effect of the environment pressure on the mechanical properties of solid propellant , the change law of mechanical properties of NEPE solid propellant as the object of study was studied under the conditions of two different tensile rates and room temperature by means of a high pressure material testing machine. The results indicated that tensile strength, elongation and breakage elongation of NEPE propellant were increased along with increase of pressure. The mathematics models on the effect of the environment pressure on the mechanical properties of NEPE solid propellant were established,and the conception of pressure exponent about mechanical properties was put forward. A simple analysis was made for the test results.

Key words: Solid propellant;Mechanical performance;Pressure exponent~+;Intensity