MIXED-MODE INTERFACE CRACK IN A PURE POWER-HARDENING BIMATERIAL

Analytical and numerical analysis of the dominant singularity solutions of the stress and strain field near an interface crack in a pure power-hardening bimaterial indicates that the crack stress singularity is -1/(nII+1) for hardening power of nI and nII(nI<nII). This result is obtained by solving the non-linear eigenvalue equations of the stress field near a plane crack while observing the conservation properties of the J-integral and the continuity conditions of the interface. Numerical results are presented for the distribution of stress, strain and displacement field of various mixed mode interface cracks when nI=1 and nII=5. Possible further destruction of the bimaterial with interface cracks is also discussed. © 1990 Kluwer Academic Publishers.