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Mixed LW/ESL models for the analysis of sandwich plates with composite faces

机译：混合LW / ESL模型用于分析具有复合面的夹心板

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摘要

In this paper, a new set of models in the framework of Carrera's Unified Formulation (CUF) is presented for the static analysis of sandwich plates. Concerning the study of multilayered structures, it is important to fulfill the interlaminar continuity conditions for the transverse stresses. For this aim, the CUF has been conceived by allowing to handle in a unified manner many theories that can differ by the order of expansion and the variables description in the thickness direction. This last can be Equivalent-Single-Layer (ESL), if the variables are assumed for the whole laminate, or Layer-Wise (LW), if the variables are described independently for each layer. The models considered in this work are derived from the Reissner Mixed Variational Theorem (RMVT) in order to model a priori the transverse shear and normal stresses. If sandwich plates with composite faces are considered, the transverse stresses are described as LW while the displacements are assumed ESL in the faces and LW at sandwich level (faces + core). This procedure permits to save degrees of freedom, preserving the same accuracy of a full layer-wise description. The new formulation is implemented in the framework of finite element analysis. Comparisons are made with 3D results.
机译：在本文中，提出了在Carrera统一配方（CUF）框架内的一组新模型，用于对夹心板进行静态分析。关于多层结构的研究，重要的是要满足横向应力的层间连续性条件。为了这个目的，已经通过允许以统一的方式处理许多理论而构想了CUF，这些理论可能因扩展顺序和厚度方向上的变量描述而有所不同。如果为整个层压板假定了变量，则最后一个可以是等效单层（ESL），如果为每个层独立描述变量，则可以为分层明智（LW）。这项工作中考虑的模型是从Reissner混合变分定理（RMVT）导出的，以便先验地模拟横向剪力和法向应力。如果考虑到具有复合面的夹层板，则将横向应力描述为LW，而假设位移在面中为ESL，在夹层处为LW（面+芯）。此过程可以节省自由度，并保持与完整分层描述相同的准确性。新的公式是在有限元分析框架内实现的。与3D结果进行比较。

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  • 来源
    《Composite Structures》 |2013年第4期|330-339|共10页
  • 作者

    M. Botshekanan Dehkordi; M. Cinefra; S.M.R. Khalili; E. Carrera;

  • 作者单位

    Center of Excellence for Research in Advanced Materials and Structures, Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;

    Department of Mechanics and Aerospace Engineering, Politecnico di Torino, Torino, Italy,Department of Aeronautic and Space Engineering, Politecnico di Torino, Corso Duca degli Abruzzi 24, 10129 Torino, Italy;

    Center of Excellence for Research in Advanced Materials and Structures, Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran;

    Department of Mechanics and Aerospace Engineering, Politecnico di Torino, Torino, Italy;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    reissner's mixed variational theorem; equivalent-single-layer; layer-wise; sandwich plate; composite skins; finite element method;

    机译：Reissner的混合变分定理;等效单层逐层夹心板;复合皮有限元法;

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