F.E.M. Analysis of Delamination Buckling in Composite Plates & Shells
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摘要: 通过建立一类新的参考面有限单元,得到适用于分析层合板壳脱层屈曲问题的有限元方法。指出了利用Mindlin假设意义下的变形协调条件,可以将大多数胜任层合板壳分析的一般板壳单元改造为相应的参考面单元。这一方法确保了位移场的合理性和协调条件的满足。为验证参考面单元的有效性,还对壳体脱层屈曲的几个算例作了数值分析。Abstract: The purpose of the present study is to develop a new finite element method for analyzing buckling of delaminated composite plates and shells. This is achieved by establishing a new finite element called the reference-surface element. By use of the compatibility condition under Mindlin assumptions, the formulation of the reference-surface element was derived from whichever plate-element or shell-element being capable of analyzing composite plates and shells. This method assures a reasonable description of displacement field and the satisfaction of compatibility conditions for delamination problem. Numerical results for linear delamination buckling of axially compressed shells are presented to validate the method.
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Key words:
- buckling /
- composites /
- delamination /
- finite element method /
- shells
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[1] Kin Hyojin.Postbuckling analysis of composite Laminated plates with a delamination[J].Computer & Structure,1997,52(6):975~983. [2] Chattopadhyay Aditi, Gu Haozhong.Modeling of elamination buckling in composite cylindrical shells with a new higher-order theory[J].Composite Science and Technology,1995,54:223~232. [3] Huang H, Kardonateas A.Buckling of orthotropic beam-plates with multiple central delaminations[J].InJ of Solids & Strutcures,1998,35(13):1355~1362. [4] 李四平,黄玉盈,胡元太等.3D复合材料脱层的屈曲和后屈曲分析[J].固体力学学报,1997,18(4):301~307. [5] 朱菊芬,郑罡.层合板分层损伤后屈曲分析新型有限元模型[J].大连理工大学学报,1998,38(5):511~515. [6] Gu Haozhong, Aditi Chattopadhyay.Delamination buckling and postbuckling of composite cylindrical shell[J].AIAA Journal,1996,34(6):1279~1286. [7] Shu D.Buckling of multiple delaminated beams[J].InJ of Solids & Structures,1998,35(13):1451~1465. [8] 张向阳,余寿文.层板脱层的能量释放率分析[J].固体力学学报,1996,17(4):331~334.
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