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首页> 外文期刊>Applied Mechanics and Engineering >A NEW C0 2D FE MODEL BASED ON IMPROVED HIGHER ORDER ZIGZAG THEORY FOR THE ANALYSIS OF SOFT CORE SANDWICH PLATE
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A NEW C0 2D FE MODEL BASED ON IMPROVED HIGHER ORDER ZIGZAG THEORY FOR THE ANALYSIS OF SOFT CORE SANDWICH PLATE

机译：基于改进的高阶曲折理论的新型C0 2D有限元模型用于软岩心夹心板的分析

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摘要

An efficient C~0 continuous finite element (FE) model is developed based on a combined theory (refine higher order shear deformation theory (RHSDT) and least square error (LSE) method) for the static analysis of a soft core sandwich plate. In this (RHSDT) theory, the in-plane displacement field for the face sheets and the core is obtained by superposing a global cubically varying displacement field on a zig-zag linearly varying displacement field with a different slope in each layer. The transverse displacement assumes to have a quadratic variation within the core and it remains constant in the faces beyond the core. The proposed model satisfies the condition of transverse shear stress continuity at the layer interfaces and the zero transverse shear stress condition at the top and bottom of the sandwich plate. The nodal field variables are chosen in an efficient manner to circumvent the problem of C~1 continuity requirement of the transverse displacements. In order to calculate the accurate through thickness transverse stresses variation, the Least Square Error (LSE) method has been used at the post processing stage. The proposed combined model (RHSDT and LSE) is implemented to analyze the laminated composites and sandwich plates. Many new results are also presented which should be useful for future research.
机译：基于组合理论（细化高阶剪切变形理论（RHSDT）和最小二乘误差（LSE）方法），建立了一种有效的C〜0连续有限元模型，用于软芯夹芯板的静力分析。在这种（RHSDT）理论中，面板和型芯的平面内位移场是通过将整体三次方位移场叠加在Z字形线性变化的位移场上而得来的，该位移场在每一层中具有不同的斜率。假定横向位移在岩心内具有二次方差，并且在岩心以外的面中保持恒定。所提出的模型满足了层界面处的横向剪应力连续性的条件以及夹层板的顶部和底部的零横向剪应力的条件。有效地选择节点场变量，以解决横向位移的C〜1连续性要求的问题。为了计算精确的整个厚度横向应力变化，在后处理阶段已使用最小二乘误差（LSE）方法。提出的组合模型（RHSDT和LSE）用于分析层压复合材料和夹心板。还提出了许多新结果，这些结果对将来的研究应该是有用的。

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