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前言在固体推进剂药柱中,一个通常遇到的结构问题是大断裂的发生和增长。要弄清此问题,也研究推进剂断裂前的特性。按研究大纲,分三个阶段进行理论和实验研究。本文涉及第一阶段企图做的和已完成的工作。即建立一个数学模型,将其应用于固体推进剂在应力作用下的单个断裂前的结构形式上,在聚合物系统中具有此种断裂前结构形式的谓之裂纹。同时研究了一种实验技术,用以测定在裂纹附近的位移场和应力场。
Introduction One of the structural problems commonly encountered in solid propellant grains is the occurrence and growth of large fractures. To understand this problem, also study the characteristics of the propellant before fracture. According to the research program, theoretical and experimental studies are conducted in three stages. This article deals with what you are trying to do and have done in the first phase. That is, a mathematical model is established and applied to a single pre-rupture structure of a solid propellant under stress and to a pre-rupture structure in a polymer system. An experimental technique was also studied to measure the displacement and stress fields near the crack.