一个适合于复合材料层合板分析的应力杂交单元
A Hybrid_stress Element to Aaalysis of Composite Laminates
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摘要: 本文根据修正的余能变分原理构造了一个适合于复合材料层合板特点的三角形单元。此单元能够考虑横向剪切变形的影响和局部扭曲效应。三角形单元的三个顶点取为节点,每个节点具有5个自由度,三个位移自由度,二个转角自由度。文中用此单元计算了几种层合板的固有频率,并将结果与解析解进行了比较。计算表明,此单元计算精度较高,应用方便。Abstract: In this paper, a triangle hybrid-stress elements which isbased on the mordified complemetary energy principle is presen ted for the analysis of composite laminates.This elements has three nodes and is able to consider transverse shear effects andlocal warping effects.Three translational and two rotational degrees of freedom are chosen, at each node.The element is applied to dynamic analysis of several laminates in the paper. Numerical results are presented to compare with the closed form solutions. It is obvious that the element has good numerical results for colculations and is simple for applications.