【摘要】 利用弹塑性有限元分析方法 ,对平行于双相介质界面的裂纹在不同长度和不同位置时的J积分进行了计算 ,并研究了裂纹尖端的J积分随双相介质材料特性的差异和裂纹到界面的距离的变化规律。分析结果表明 ,裂纹位于硬介质中的J积分小于位于软介质中的J积分 ,当裂纹靠近界面时 ,硬介质中J积分将增大 ,而软介质中J积分将减小。更多还原

【Abstract】 By the us of finite element analytical method of elastic-plasticity, a calculation of J integral for cracks with different length and different position and parallell to double phased medium interface was conducted.The law was studied for crack tip J integral which varies along with the characteristic diversity of double phased medium material and the different distances betweem crack and interface. Analytical result indicates that the J integral for cracks lie in hard medium is less than that lie in soft medium. While the crack is close to the interface, the J integral in hard medium will increase and that in soft medium will decrease.更多还原