多相介质层状材料中围道“非汉字符号”积分守恒性的研究

Research to the closed ■-integral conservation in multi media laminar materials

通过证明得到了多相介质层状材料中的任意一种均质材料的回路 J∧ 积分等于零 ;证明了在多相介质层状材料的界面上裂纹 ,以及平行界面的裂纹尖端的围道 J∧ 积分是守恒的 ,为

In this paper, the conservation of the closed J ∧ integral is proved. The theoretical analysis indicates that the closed J ∧ integral is conservation for multi media laminar materials. The author's analysis provides a theoretical foundation for characterizing and measuring the fracture toughness of the multi media laminar materials.