固体火箭发动机药柱内应力的产生与预防

对固体火经柱裂纹的产生机理及改善裂纹的方法进行了探讨，认为药柱裂纹是药柱本身的内应力千成的，其机理是药柱内部的自由体积膨胀和交联收缩导致内应力产生。根据分析，通过寻找最佳材料配方和工艺参数来减少热应力的产生，并采取措施使已产生的内应力释放等方法，可减少或避免药柱裂纹的产生。

The Analysis and Prevention of Internal Stress in the Solid Rocket Motor Grain Flaw

The article discussed the emerging mechanism and improving method of solid rocket motor grain flaw. The grain flaw was owing to the internal stress, caused by free volume expansion and cross linking contract inside the grain. According to the analysis, appropriate measures, such as reducing the thermal stress by the way of optimum material and process, releasing the internal stress through many methods and etc, could reduce or avoid grain flaw.