Advanced Zig-Zag Beam Theories for Sandwich Structures Analyses

M. Filippi, E. Carrera
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引用次数: 5

Abstract

This work aims at evaluating the capabilities of several higher-order beam formulations for stress and dynamic analyses of layered sandwich structures. The structural models are conceived within the framework of the Carrera Unified Formulation (CUF) that allows one to generate (and compare) an infinite number of displacement fields. The number and the type of functions that are selected to generate the kinematic expansions are input parameters of the problem. Besides the well-known Taylor- and Lagrange-type expansions, great attention is paid to a new class of advanced higher-order zig-zag theories, which are written as combinations of continuous piecewise polynomial functions. Numerical simulations are performed on laminated and sandwich beams with very low length-to-depth ratio values. Also, structures with soft layers made of viscoelastic materials are considered to investigate the different dissipation mechanisms.
用于夹层结构分析的先进之字形梁理论
本工作旨在评估几种用于层状夹层结构应力和动力分析的高阶梁公式的能力。结构模型是在Carrera统一公式(CUF)的框架内构思的,它允许人们生成(和比较)无限数量的位移场。选择用于生成运动学展开的函数的数量和类型是问题的输入参数。除了众所周知的泰勒型和拉格朗日型展开外,人们还非常关注一类新的先进的高阶之字形理论,它们被写成连续分段多项式函数的组合。数值模拟对具有很低长深比值的层合梁和夹层梁进行了计算。此外,还考虑了由粘弹性材料制成的软层结构,以研究不同的耗散机制。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
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