在均衡拉应力情况下,描述一个孔洞在三晶交处的萌生以及长大,将对晶界滑移、孔洞的表面能、晶界界面能以及晶体里面储存的弹性能量对孔洞增长率的影响进行分析。最后讨论在均衡拉应力下的应力松弛变形,同时计算应力松弛位移。应力松弛不仅阻碍孔洞和裂纹的萌生同时对孔洞的增长率也有一定影响。 In the case of equilibrium tensile stress, the effect of the initiation and growth of a hole at the triple junction on the grain boundary slip, the surface energy of the hole, the interfacial energy at the grain boundary and the elastic energy stored in the crystal on the hole growth rate Analyze. Finally, we discuss the stress relaxation deformation under equilibrium tensile stress and calculate the stress relaxation displacement. Stress relaxation not only hinders the initiation of holes and cracks but also affects the growth rate of holes at the same time.