Case Criterion of Crack Onset in Orthotropic Bi-Material Notches
A bi-material notch composed of two orthotropic parts is considered. The stresses and displacements are expressed using the Stroh-Eshelby-Lekhnitskii formalism for plane elasticity. The potential direction of crack initiation is determined from the maximum mean value of the tangential stress or the local minimum of the mean value of the generalized strain energy density factor in both materials [1, 2]. The matched asymptotic procedure is introduced to derive the change of potential energy for the debonding crack and the crack initiated in the determined direction .
T. Profant et al., "Case Criterion of Crack Onset in Orthotropic Bi-Material Notches", Key Engineering Materials, Vol. 465, pp. 157-160, 2011