固体火箭发动机壳体低应力爆破现象,在发动机研制中屡见不鲜。壳体发生低应力爆破的主要原因是处于拉应力状态下的表面裂纹或类裂纹扩展到引起脆断的临界尺寸所致。而喷丸强化能使零件表面产生压应力,封闭零件表面裂纹或类裂纹,推迟裂纹扩张断裂时间,延长壳体使用寿命,减少低应力爆破。 Solid rocket motor shell low-stress blasting phenomenon, common in the engine development. The main reason for low stress burst in the shell is that the surface cracks or similar cracks in the tensile stress state extend to the critical size that causes the brittle fracture. The shot peening can make parts of the surface of the compressive stress, the closure of parts surface cracks or cracks, delayed crack propagation delay time to extend the life of the shell to reduce the low-stress blasting.