Stiffness analysis of corrugated laminates under large deformation

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• 作者：C. Thurnherr ; ^{thclaudi@ethz.ch} ; L. Ruppen ; S. Brä ; ndli ; C.M. Franceschi ; G. Kress ; P. Ermanni
• 关键词：Corrugated laminates ; Non-linearity ; Flexible skins ; Anisotropy
• 刊名：Composite Structures
• 出版年：2017
• 出版时间：15 January 2017
• 年：2017
• 卷：160
• 期：Complete
• 页码：457-467
• 全文大小：4651 K
• 卷排序：160

文摘

This paper presents a detailed investigation about the geometric non-linear stiffness behavior of corrugated laminates in six different load cases. The considered tensile, bending, and shear load cases allow the modeling with a unit-cell approach assuming a generalized plane strain state. The torsional load case is more complex. There the mechanical response depends on the number of unit-cells and the width of the samples in case of geometric non-linearities. We first identify the load cases that show a non-linear stiffness response under large deformation. Then the non-linear behavior is analyzed in detail using numerical simulation and we aim for mechanical explanations to describe the non-linear behavior. The FE simulations of the torsional load case are validated using experiments with 3D printed samples.