Analysis of the out-of-plane compression and shear response of paper-based web-core sandwiches subject to large deformation

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• 作者：P. Isaksson^a ; ^{per.isaksson@angstrom.uu.se" class="auth_mail" title="E-mail the corresponding author} ; L.A. Carlsson^b
• 关键词：Web-core sandwich ; Large deformation ; Numerical analysis ; Paper
• 刊名：Composite Structures
• 出版年：2017
• 出版时间：1 January 2017
• 年：2017
• 卷：159
• 期：Complete
• 页码：96-109
• 全文大小：6359 K

文摘

The mechanical response of three different structural core sandwich panels in out-of-plane compression and shear has been analyzed. Specific core shapes examined are arc-tangent, wavy trapezoidal and hemispherical. Unit cells consisting of representative elements of the core attached to face sheets were selected for analysis. Both face sheets and core were assumed made from paper. Finite element analysis employing large deformation and rotations and orthotropic elastic–plastic behavior was used. The results show that the arc-tangent and trapezoidal cores are prone to collapse by extensive bending and buckling, whereas the hemispherical core behaved more stably in compression and shear. Core sheets with a hemispherical shape were prepared from copy paper sheets in a specially designed forming machine. Sandwich test specimens were prepared from this core and tested in out-of-plane compression, and the load-displacement response was compared to predictions from finite element simulations. The experimental and finite element results were consistent.