考虑冰劈效应的裂缝应力强度因子分析

摘要

根据热弹性理论将冰劈效应转化为冰劈荷载，并基于扩展有限元方法( XFEM)，采用ABAQUS有限元分析软件建立半无限板模型，求解裂缝在冰劈效应下的应力强度因子，同时通过公式计算其应力强度因子的理论解，将两者进行了对比分析，采用不同的积分区域因子rk ，通过J积分算法求解不同深度裂缝应力强度因子，得到rk 取值范围，通过调整网格加密系数，研究了裂缝区域网格加密对于应力强度因子的影响。%The paper converts frost-splitting effect into frost-splitting load according to thermal-magnetoelasticity, establishes semi-infinite model by applying ABAQUS finite element analysis software according to XFEM. The cracking stress-intensity factors are solved under frost-splitting effect. Simultaneously, it calculates theoretical stress-intensity factors with calculation, and makes a comparison. And then, it adopts different integral area factor rk , solves various-depth cracking stress-intensity factors by J integral computation method, obtains rk valuing scope. Through adjusting grid coefficients encryption, it studies the impact of grid coefficients encryption within cracking area upon stress-intensity factors.