Global buckling response of sandwich panels with additively manufactured lattice cores

IF 3.5 3区材料科学 Q1 ENGINEERING, MECHANICAL

Journal of Sandwich Structures & Materials Pub Date : 2024-09-09 DOI:10.1177/10996362241282854

Serhat Osmanoglu, Christian Mittelstedt

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Abstract

This paper deals with the analytical and numerical global buckling analysis of rectangular sandwich plates utilized AlSi10 Mg in both facesheets and lattice cores. In this study, six different strut-based lattice core models are designed. Additionally, the buckling resistance of lattice panels is compared with a typical honeycomb panel. Analytical studies were carried out using Kirchoff plate theory (CLPT), first-order shear deformation theory (FSDT) coded on MATLAB and finite element (FE) analyses in Abaqus. In the theoretical approaches, the Navier solution is derived for sandwich plates with simply supported boundary conditions at all edges. In the FE analyses, validated homogenized lattice structures models were used to avoid excessive numbers of elements and to save computational time. The parametric effects of side-to-thickness ratio, and different designed core cells on global buckling responses are investigated. As a result of comparing the analytical results with the FE model, a good agreement is obtained, and it is found that analytical buckling analyses FSDT can be used within certain size limits for the global buckling analysis of lattice core sandwich structures.

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采用添加式格构芯材的夹芯板的整体屈曲响应

本文论述了采用 AlSi10 Mg 面板和晶格核心的矩形夹层板的分析和数值全局屈曲分析。在这项研究中，设计了六种不同的基于支柱的格状芯模型。此外，还将格子板的抗屈曲性与典型的蜂窝板进行了比较。分析研究采用基尔霍夫板理论（CLPT）、MATLAB 中编码的一阶剪切变形理论（FSDT）和 Abaqus 中的有限元（FE）分析。在理论方法中，对所有边缘都有简单支撑边界条件的夹层板推导出纳维耶解。在有限元分析中，使用了经过验证的均质晶格结构模型，以避免元素数量过多并节省计算时间。研究了边厚比和不同设计的核心单元对全局屈曲响应的参数影响。将分析结果与 FE 模型进行比较后发现，两者的结果非常吻合，而且分析屈曲分析 FSDT 可以在一定的尺寸限制内用于晶格核心夹层结构的全局屈曲分析。

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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来源期刊

Journal of Sandwich Structures & Materials 工程技术-材料科学：表征与测试

CiteScore

9.60

自引率

2.60%

发文量

审稿时长

7 months

期刊介绍： The Journal of Sandwich Structures and Materials is an international peer reviewed journal that provides a means of communication to fellow engineers and scientists by providing an archival record of developments in the science, technology, and professional practices of sandwich construction throughout the world. This journal is a member of the Committee on Publication Ethics (COPE).