Stress distribution around delamination cracks branched from transverse cracks is considered for [90°/0°]s composite laminates. Based upon the eigenfunction expasion of the Lekhnitskii's complex stress functions, the form of asymtotic solution around the crack tip is determined, and the complete solution is obtained through boundary collocation.
The linear elastic fracture parameters, such as the stress intensity and the energy release rate, are computed for various crack lengths and thickness ratios of the two layers. The results conduce to the understanding of delamination crack behavior including its stability.