State DecompositionEnergy Method for Analysis of Debonding Problem of Honeycomb Sandwich Plates
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摘要: 讨论了工程中常见的夹芯板面板与芯材间的脱胶问题,用状态分解方法建立了一种分析含脱胶区的蜂窝夹芯板的力学模型.将分析夹芯板的脱胶问题归结为分析由脱胶引起的附加位移与附加应力.利用双三角级数和RayleighRitz方法求解了具有矩形脱胶区的蜂窝夹芯板脱胶问题的附加位移,对解的收敛性分析表明具有较好的收敛性.本文的解,为确定含脱胶的蜂窝夹芯板临界屈曲载荷以及断裂力学参数的确定,提供了合理而简单的位移模态.Abstract: A sandwich plate with debonding between the face plates and honeycomb core is considered.A mechanical analysis model is built to study a honeycomb sandwich plate with debonding by state decomposition method.Analysis for debonding of honeycomb sandwich plates is carried out the by method of additional displacements and additional stresses produced by debonding between the face and core.The additional displacements of honeycomb sandwich plates containing rectangular debonding are analyzed by double trigonometric series and RayleighRitz method.The convergence of displacements shown by computation is satisfactory well.The result of displacements provides a simple and reasonable model for solving buckling load and fracture mechanics parameters of the honeycomb sandwich plate with debonding.
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Key words:
- honeycomb structure /
- sandwich laminates /
- delamination /
- energy method /
- state decomposition
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1.Kim W C,Miller T C,Dharan C K H.Strength of composite sandwich panels containing debonds.Int J Solids Structures,1993,30(2):211~223 2. Hwu C,Hu J S.Buckling and postbuckling of delaminated composite sandwich beams.AIAA J,1992,30(7):1901~1909 3. 缪长青,张 行蜂窝夹芯梁脱胶问题的力学分析北京航空航天大学学报,1998,24(1):54~57 4. 中国科学院力学所夹层板壳的弯曲、稳定和振动北京,科学出版社,1977 5. 张 行高等弹性理论北京航空航天大学出版社,1994 -
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