Abstract: In the case of small scale delamination,the cross section of laminate is divided into two regions Ⅰ and Ⅱ,including and excluding delamination(interface crack)respectively. In each region,the eigen expansions of displacement and stress fields satisfying all of govern- ing equations,boundary conditions along delamination surfaces and conditions of continuity along undelaminated portion of interface are derived.The other boundary conditions and conditions of continuity between the two regions are satisfied b...