Abstract In this paper a strategy for the stress analysis of sandwich plates and shells employing the active face triangular-based prismatic finite element is provided, which combines three-dimensional membrane elements (called active face) with solid elements providing stiffening cells, usually called honeycomb. The connection of solid and active face elements is done by direct nodal correspondence, keeping the total number of degrees of freedom unaltered, which makes the technique highly economical from the numerical point of view. Orthotropic properties are specially addressed, which are important for material failure criteria studies. The accuracy of the active face prismatic finite element is also evaluated in the calculation of natural frequencies of honeycomb sandwich panels for acoustic vibration isolation purposes, for instance. Results for orthotropic sandwich plates and shells are presented and compared with established commercial software and literature results.

中文翻译：

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正交各向异性层压板的活动面棱柱有限元振动和应力分析

摘要 本文提出了一种基于活动面三角形棱柱有限元的夹层板壳应力分析策略，该方法将三维膜单元（称为活动面）与提供加劲单元的实体单元（通常称为蜂窝单元）相结合。 . 实体和活动面元素的连接是通过直接节点对应完成的，保持自由度的总数不变，这使得该技术从数值角度来看非常经济。特别解决了正交各向异性属性，这对于材料失效标准研究很重要。例如，在计算蜂窝夹层板的固有频率时，也评估了活动面棱柱有限元的精度，以用于隔声目的。