摘要
从一组给定的裂纹张开位移 (COD)资料求应力强度因子 (SIF)的好方法应具有以下特征 :( 1)这个方法应最大限度地利用已知的COD信息 ;( 2 )数值计算只包含位移量 ;( 3)后处理简单 ;( 4 )所得到的SIF的误差可由COD资料本身的误差来估计 .该文将求内裂纹SIF的COD全场拟合法扩充应用到边裂纹问题 ,该方法具有上述优点 .对几种典型的边裂纹用边界元法得到的COD资料 ,用这种方法得到了可靠性高、一致性好的SIF 。
From a given set of crack opening displacement (COD) data, a good procedure to extract the stress intensity factors should have the following features: (1) The procedure should make full use of the known COD data. (2) The numerical calculation should only involve displacement fields. (3) The post procedure should be as simple as possible. (4) The error of the obtained stress intensity factor can be estimated from the error information of COD data in themselves. The Global Crack Line Displacement Fitting Procedure for internal cracks has been extended to the use for edge cracks in this work. The procedure possesses the above mentioned features. Reliable and well consistent stress intensity factors are obtained for several typical edge cracks by using this procedure, and the accuracy has reached the average accuracy of the corresponding COD data.
出处
《固体力学学报》
CAS
CSCD
北大核心
2000年第4期355-360,共6页
Chinese Journal of Solid Mechanics
基金
北京市自然科学基金!(项目编号 :8982 0 0 6 )资助项目
