岩石四弯裂纹试件动应力强度因子的数值计算

NUMERICAL COMPUTATION OF DYNAMIC STRESS INTENSITY FACTORS OF FOUR POINT BENDING CRACK SPECIMENS

采用动态有限元与动态Ｊ（ｔ）积分相结合的数值方法，首次计算了岩石四弯裂纹试件的动应力强度因子ＫＩ（ｔ）与ＫＩ（ｔ），获得了各种复合比下ＫＩ（ｔ）／Ｋ０，ＫＩ（ｔ）／Ｋ０－ｔ的关系曲线。结果表明，本文方法具有较好的效果。

The Numerical method of dynamic finite element and dynamic (t) integral is used in this paper. The values of K I (t) and K II (t) of four point bending crack specimens of rock are calculated firstly. The K I (t)/K 0 and K II (t)/K 0 t curves of various K I (t)/K II (t) ratios are obtained. The results show that the reported method has better effects.