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首页> 外文期刊>Applied Mechanics and Engineering >STATIC, VIBRATION AND BUCKLING ANALYSIS OF SKEW COMPOSITE AND SANDWICH PLATES UNDER THERMO MECHANICAL LOADING
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STATIC, VIBRATION AND BUCKLING ANALYSIS OF SKEW COMPOSITE AND SANDWICH PLATES UNDER THERMO MECHANICAL LOADING

机译：热力载荷作用下偏斜复合材料板和夹心板的静态，振动和屈曲分析

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摘要

Static, vibration and buckling behavior of laminated composite and sandwich skew plates is studied using an efficient C~0 FE model developed based on refined higher order zigzag theory. The C~0FE model satisfies the inter-laminar shear stress continuity at the interfaces and zero transverse shear stress conditions at plate top and bottom. In this model, the first derivatives of transverse displacement have been treated as independent variables to overcome the problem of C' continuity associated with the plate theory. The C~0 continuity of the present element is compensated in the stiffness matrix formulation by adding a suitable term. In order to avoid stress oscillations observed in the displacement based finite element, the stress field derived from temperature is made consistent with the total strain field by using field consistent approach. Numerical results are presented for different static, vibration and buckling problems by applying the FE model under thermo mechanical loading, where a nine noded C° continuous isoparametric element is used. It is observed that there are very few results available in the literature on laminated composite and sandwich skew plates based on refined theories. As such many new results are also generated for future reference.
机译：利用基于改进的高阶之字形理论开发的有效C〜0 FE模型，研究了层合的复合材料和夹层斜板的静，振动和屈曲行为。 C〜0FE模型满足界面处的层间剪切应力连续性和板顶部和底部的零横向剪切应力条件。在该模型中，横向位移的一阶导数已被视为独立变量，以克服与板理论相关的C'连续性问题。通过添加合适的项，可以在刚度矩阵公式中补偿本单元的C〜0连续性。为了避免在基于位移的有限元中观察到应力振荡，使用场一致方法使从温度导出的应力场与总应变场一致。通过在热机械载荷下应用有限元模型，针对不同的静，振动和屈曲问题，给出了数值结果，其中使用了九个节点的C°连续等参单元。可以观察到，基于改进的理论，层压复合板和夹层斜板的文献报道很少。因此，还将产生许多新结果，以供将来参考。

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