By adopting the method of coupling analysis, and a comprehensive consideration on composed pressure and affections of pre-tightened radial force and thermal stress, the internal stress field of anvil was obtained and the damage mechanism was expounded.

• 采用耦合分析方法，综合考虑合成压力、径向预紧力和热应力的作用，获得了顶锤内部的应力场，阐述了破坏机理。