【摘要】 采用有限元和动态Ｊ积分相结合的方法，首次较精确地计算了四点弯曲试件的ＫⅠ（ｔ），ＫⅡ（ｔ）的值，获得了各种复合比时ＫⅠ（ｔ），ＫⅡ（ｔ）的关系曲线，并提出了一种确定ＫⅠｄ和ＫⅡｄ的方法，对提出的算法程序进行了验证．更多还原

【Abstract】 The values of K Ⅰ(t) and K Ⅱ(t) of four point bending specimens are calculated firstly with the conbination of finite element and dynamic integral methods,the curvs of various K Ⅰ(t)/K Ⅱ(t) ratios are drawn,and a method of determining K Ⅰd and K Ⅱd proposed.The proposed algorithm and program is proved correctly.更多还原