Asymptotic Stress Field in a Degenerate Orthotropic Material Containing a Cohesive Zone ahead of a Crack Tip

Complex variable and eigenfunction expansion methods are used to derive elastic stress fields near the cohesive zone of a crack aligned with principal axes of a degenerate orthotropic material. Asymptotic field terms are obtained using coordinate rescaling and transformation techniques. The stress fields do not have stress singularity. Variations of stress components associated with the first-order or dominant stress terms are discussed in detail.