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首页> 外文会议>The 2001 ASME International Mechanical Engineering Congress and Exposition, 2001, Nov 11-16, 2001, New York, New York >DELAMINATION EFFECTS IN CIRCULAR SANDWICH PLATES WITH LAMINATED FACES OF GENERAL LAYUP AND A 'SOFT' CORE
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DELAMINATION EFFECTS IN CIRCULAR SANDWICH PLATES WITH LAMINATED FACES OF GENERAL LAYUP AND A 'SOFT' CORE

机译：具有一般层叠层和“软”芯层的圆形夹心板的脱层效果

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摘要

The present study is concerned with the behavior of delaminated circular sandwich plates with a compressible "soft" core and composite laminated face sheets of general layup. The analysis follows the concepts of the High-Order Sandwich Plate Theory and employs the variational principle of virtual work for the derivation of the field equations of the fully bonded and delaminated regions. In the penny shaped disbonded region, the delaminated faces can slip horizontally with respect one to another, yet they may be in contact and resist vertical normal compressive stresses. The compressible core is considered using the 3D theory of elasticity and the lamination theory is employed for the modeling of the composite laminated face sheets. The formulation yields coordinate-dependent constitutive relations and governing equations and the solution procedure adopts the Galerkin method in the circumferential direction and the multiple-points shooting method in the radial direction. Numerical results regarding a typical delaminated sandwich plate are presented in terms of deformations and stresses. The results reveal the effect of the anisotropic laminated face sheets on the response of the structure and the influence of the delamination on the overall and, especially, the localized behavior of the plate.
机译：本研究涉及具有可压缩的“软”芯和一般铺层的复合层压面板的分层圆形夹心板的性能。该分析遵循高阶夹层板理论的概念，并采用虚拟功的变分原理推导完全结合和分层区域的场方程。在便士形的分离区域中，分层的面可以相对于彼此水平滑动，但是它们可以接触并抵抗垂直的法向压缩应力。使用3D弹性理论考虑可压缩核心，并将层压理论用于复合层压面板的建模。该公式产生依赖坐标的本构关系和控制方程，求解过程在圆周方向上采用Galerkin方法，在径向方向上采用多点射击方法。根据变形和应力，给出了有关典型分层夹层板的数值结果。结果揭示了各向异性层压面板对结构响应的影响以及分层对板的整体尤其是局部行为的影响。

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