双相介质界面裂纹的J积分守恒性研究

Study on J-integration conservation of crack in porous media interface

通过证明得到了双相介质层状复合材料中的任意一种均质材料的回路J积分等于零;证明了在双相介质层状复合材料的界面上裂纹,以及平行界面的裂纹尖端的围道J积分是守恒的,为J积分表征多相材料的断裂韧性提供了理论依据.利用有限元的方法对给出的J积分,进行数值验证.

This paper proves ous media laminar composite face and parallel interface is characterizing fracture toughn tion is proved numerically that loop J-integration of random hom equals zero. The closed J-integration ogeneous material in por- of crack tip at the inter- conservation. The analysis provides a theoretical foundation for ess property of heterogeneous material. J-integration conserva- by the finite element method.