Finite Element Models Used to Determine the Equivalent In-plane Properties of Honeycombs

详细信息    查看全文

• 作者：Ştefan Sorohan ; Marin Sandu ; Adriana Sandu ; Dan Mihai Constantinescu ; ^{dan.constantinescu@upb.ro" class="auth_mail" title="E-mail the corresponding author}
• 关键词：Honeycombs ; Representative volume element ; Finite elements ; Mechanical properties ; Young's moduli ; Poisson's ratios.
• 刊名：Materials Today: Proceedings
• 出版年：2016
• 出版时间：2016
• 年：2016
• 卷：3
• 期：4
• 页码：1161-1166
• 全文大小：150 K

文摘

This paper presents some general two- and three-dimensional finite element models capable to obtain accurate equivalent in-plane orthotropic mechanical properties of honeycombs using the homogenization method. For that, the models are developed on a representative volume element with appropriate periodic boundary conditions and three load cases: two pure axial loads and a pure in-plane shearing load. The developed models use beam, solid 2D and 3D, and also shell type finite elements. The proposed models are validated using analytical relationships from literature and can be extended to more complicated geometries where no analytical relationships for homogenizations exist. For this reason, some aspects regarding their proper use, depending on the purpose of the analysis, are presented. It is shown that similar models can be used for different periodic cell structures as chiral and anti-chiral honeycomb structures. The developed finite element models can also be used conveniently for parametric and sensitivity analyses because the total number of degrees of freedom is relatively small compared to a complete model.