层合板壳脱层屈曲的有限元分析

F.E.M. Analysis of Delamination Buckling in Composite Plates & Shells

1.
Engineering Mechanics Department, Dalian University of Technology, Dalian 116024, P R China;
2.
Civil Engineering Department, Zhejiang University, Hangzhou 310027, P R China

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。
- 屈曲 /
- 复合材料 /
- 脱层 /
- 有限元法 /
- 壳
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.
- buckling /
- composites /
- delamination /
- finite element method /
- shells

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