在预裂坝体结构中瞬时传热或动力引起的应力发展可以看作特殊情况下断裂力学研究特有的例子。两种作用都要求使用关于裂缝面张开和闭合的特殊接触单元。进一步推断 ,裂缝尖端区必须用 2 7个节点的 (变态的 )砖状单元来表示 ,以获得单元的相容性。提出了一种非常类似于表示应力强度因子沿裂缝锋面分布的 2 0个节点单元的应力强度因子计算程序的例行程序。通过对支墩坝温变开裂的断裂力学研究 ,证明该方法是适用的 The development of stress due to instantaneous heat transfer or power in the structure of a pre-cracked dam can be considered as a peculiar example of fracture mechanics under special circumstances. Both functions require the use of special contact elements that open and close the fracture surface. It is further deduced that the crack tip region must be represented by a (metamorphic) brick element of 27 nodes to achieve cell compatibility. A routine is presented that is very similar to the procedure for calculating the stress intensity factor for 20 node cells distributed along the fracture front with stress intensity factors. The fracture mechanics research on temperature change cracking of pier is proved that this method is suitable