【摘要】 由Ｍ守恒积分给出了其远场积分值与宏观裂纹及其裂尖周围裂纹群应力强度因子间的分配关系，导出了分配表达式，该式首次显化了裂纹间的距离对裂纹间干涉效果、裂尖应力松弛的影响，是定量评估裂纹干涉效果的一个较为理想的方法。建立了裂纹干涉效果定量分析的一种新方法———Ｍ积分评价理论。更多还原

【Abstract】 A contribution relationship of conservation law M-Integral along a far field path between a main-crack and micro-cracks around the main-crack tip is proposed. The expression of this contribution relationship is derived, which gives the affection of the distances between main-crack and micro-cracks on interaction effects. The discussion gives an ideal method for assessing numerically the interaction effects. Then the M-integral assessment theory is established.更多还原