圆形脱层的轴对称屈曲及扩展分析

利用高阶摄动结合打靶法，分析了固支圆板在均匀径向力作用下的轴对称屈曲和过屈曲，所得结果与文（６）的ＦＥＭ结构吻合得很好，应用于薄膜－基底结构，研究了受压薄膜脱层的屈曲、扩展问题，得到了在一定的残余压应力作用下，脱层屈曲的临界尺寸Ｒｃ和扩展尺寸Ｒｇ。

THE ANALYSIS OF AXISYMMETRIC BUCKLING AND GROWTH OF CIRCULAR-SHAPED DELAMINATION

The buckling and post-buckling of clamped circular plate subjected to well distributed radial compressed load is presented by using the high-order perturbation analysis and shooting method. The six-order solution shows good agreement with the FEM results in 6]. The results in this paper are applied to investigate the buckling and growth of pressed thin film delamination in the film/substrate system. Under a certain residual press in the thin film, two characteristic blister radii Rc and Rg are obtained. The numbering result shows that the growth criteria of delamination in 4,5] is not Perfect. In variant residual stress or interface toughness, the conditions of no growth, stable growth and instable growth of the delamination are obtained by comparing the driving force on the interface crack tip with the interface toughness.