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首页> 外文会议>International conference on computational structures technology >Prediction of the Two-Scale Buckling Response of Sandwich Beams under In-Plane Compression
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Prediction of the Two-Scale Buckling Response of Sandwich Beams under In-Plane Compression

机译：平面内压缩下夹层梁两尺度屈曲响应的预测

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This paper is dedicated to the study of global (at the sandwich scale) and local (at the component scale) buckling in sandwich structures. First, a uni ed analytical characterization is given for both global and local buckling. Then these analytical critical loads are translated into sandwich con guration selection diagrams. A 'light' FE model is then proposed to carry out low CPU-time non-linear post-buckling analyses. The post-buckling response computed for elastic materials are mostly super-critical, for small geometrical imperfections. But for some con gurations, interactive buckling can develop yielding a highly sub-critical response due to the occurrence of some unsymmetrically distributed geometrical localizations. When an elastoplastic core is considered the response becomes systematically sub-critical, and limit loads reduce consequently. A strong imperfection sensitivity is also noticed.
机译：本文致力于夹层结构中全球（在夹层规模）和局部（处于组分规模）的研究。首先，为全球和本地屈曲给出了UNI ED分析表征。然后将这些分析临界负载转换成夹层配置图。然后提出了“光”Fe模型来执行低CPU - 时间非线性后屈曲分析。针对弹性材料计算的后屈曲响应主要是超级关键的，用于小几何缺陷。但是对于某些配置，互动屈曲可能由于某些未对称分布的几何本地化而产生高度亚临界响应。当认为弹塑性核心时，响应变得系统地亚临界，并且因此限制负荷减少。还注意到了强烈的缺陷敏感性。

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