【摘要】 本文建立了一个分析复合材料夹层板面芯椭圆分层屈曲的二维弹性基础模型；并找到了一个能很好地反映分层屈曲变形特征的位移表达式。通过应用瑞利—里兹能量法得到了分层的临界屈曲载荷和有效边界刚性系数Ｃ′。本文发现，经典的薄膜分层模型不能反映夹层板芯子对面芯分层的横向弹性支持作用，只能给出面芯分层屈曲的上临界载荷。本文还得到了一些分层参数与有效边界刚性系数Ｃ′的关系。更多还原

【Abstract】 A twodimensional elastic foundation model to analyze the buckling of　 elliptical facecore delaminations in composite sandwich plates is established. A displacement function is found to properly describe the buckling shapes of delaminations. The buckling loads and effective boundary fixity coefficient C′ of delaminations are obtained by RayleighRitz energy method. It is found thatthe film delamination model can not reflect the effect of the core on delaminations by transverse elastic support, and can only give the upper critical buckling load　of delaminations. Also the relations between the parameters of the delamination and the effective boundary fixity coefficient C′ are analyzed.更多还原