有限元法
平面应力
理论(学习稳定性)
离散化
光学(聚焦)
要素(刑法)
正多边形
稳健性(进化)
平面(几何)
应用数学
数学
计算机科学
结构工程
数学分析
几何学
工程类
物理
政治学
生物化学
法学
化学
光学
机器学习
基因
作者
Lahiru N. Dissanayake,D. S. T. Costa,K. K. Wijesundara
出处
期刊:Lecture notes in civil engineering
日期:2022-09-29
卷期号:: 3-15
标识
DOI:10.1007/978-981-19-2886-4_1
摘要
Virtual element method (VEM) is an extension of the standard finite element method (FEM), providing a more generalized approach to overcome the drawbacks of the FEM. A comprehensive literature review is carried out to observe the current applications of VEM for two-dimensional structural problems. However, it is observed that the current applications do not focus specifically on the importance of the stability parameter of the VEM. Therefore, this research is focused to study the effects of the stability parameter on the robustness and the stability of the VEM developing a general-purpose VEM code for analysis of the plane stress/plane strain problems. For this purpose, simple shaped polygons are proposed as the discretized element since they fully utilize the importance of VEM. Four case studies are carried out to compare the results obtained from the VEM and the FEM with the exact solution. Analytical results show that the stability parameter of the VEM can be categorized into three regions, and it is very much sensitive to the aspect ratio. This study proposes an equation to estimate the stability parameter as a function of aspect ratio to obtain more accurate results than the standard FEM results. Furthermore, this study concludes that VEM can be effectively used to model the structure using the non-convex element.
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