中国舰船研究Issue(2)：46-52,64,8.DOI:10.3969/j.issn.1673-3185.2013.02.009
移除单元法中单元失效应变的确定
The Determination of Element Failure Strain with the Element Removal Method
张美兰 1陈震 1赵晟1
作者信息
- 1. 上海交通大学 船舶海洋与建筑工程学院，上海 200240
- 折叠
摘要
Abstract
To simulate the tensile fracture process of cracked plates using the element removal method, this paper analyses the method of choosing element failure strain and various influencing factors. Resorting to the finite element software,MSC.Dytran,the maximum load,displacement and energy of the cracked plate are calculated,based on which the effects of the material property and grid size on element failure strain are investigated. The deviation of the failure strain under three criterions is discussed. The results show that the failure strain determined by the energy criteria,which considers both the load and displace⁃ment,best agrees with the experimental data,and the mechanical property of cracked plates are also re⁃flected correctly. On the other hand,the maximum displacement criteria provides larger maximum load re⁃sult than expected,which makes it suitable for the numerical calculation that focus on the displacement of cracked plates. Finally,the deviation of the maximum load criteria is too large to reflect the accurate me⁃chanical property of cracked plates. Above all,the element removal method is best suited for simulating the fracture process of large structures.关键词
裂纹板/数值仿真/失效应变/网格尺寸Key words
cracked plate/numerical simulation/failure strain/element size分类
交通工程引用本文复制引用
张美兰,陈震,赵晟..移除单元法中单元失效应变的确定[J].中国舰船研究,2013,(2):46-52,64,8.
