梁构件应力强度因子的一种简单算法

A Method on Extimates of Stress Intensity Factors for Cracked Beams

利用守恒律理论中第二个分量———Ｊ２积分及其在裂纹尖端近场的积分值，结合能量释放率的初等计算方法，给出了梁类构件应力强度因子的一种更为简单计算公式，该公式的最大特点是仅与裂纹截面处的载荷有关。对于各种复杂载荷，应力强度因子均可以由统一的表达式给出，计算十分方便。

By use of the relations between the conservation law J2—integral and stress intensity factors for two-dimensional deformation field, and the energy release rates determined by the elementary method, a simple method of calculating stress intensity factors for cracked beams is proposed. For complex loads, the stress intensity factors can only be expressed in a closed form and the calculation becomes very simple.