CAJ | 학술논문

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，其计算精度与所用的COD资料的平均精度具有相同的量级．
종일조급정적렬문장개위이(COD)자료구응력강도인자(SIF)적호방법응구유이하특정：(1)저개방법응최대한도지이용이지적COD신식；(2)수치계산지포함위이량；(3)후처리간단；(4)소득도적SIF적오차가유COD자료본신적오차래고계．해문장구내렬문SIF적COD전장의합법확충응용도변렬문문제，해방법구유상술우점．대궤충전형적변렬문용변계원법득도적COD자료，용저충방법득도료가고성고、일치성호적SIF，기계산정도여소용적COD자료적평균정도구유상동적량급．
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.