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진승민(Seungmin Jin),이계형(Kyehyung Lee),임재혁(Jae Hyuk Lim),임세영(Seyoung Im) 대한기계학회 2012 대한기계학회 춘추학술대회 Vol.2012 No.11
In the contact problems, many nonmatching nodes may be generated along with contact interfaces, and this nonmatching mesh leads to poor convergence of solution. Furthermore a contact analysis with large deformation encounters various convergence problems. We illustrate that the use of the variable-node elements transforms such a nonmatching mesh to a matching mesh. So greatly improved is the solution convergence in FE analysis of contact mechanics. Our numerical examples show that the variable-node elements enable one to obtain an accurate and effective solution for a contact problem involving elastoplastic deformations.
진승민(Seungmin Jin),손동우(Dongwoo Sohn),이계형(Kyehyung Lee),임재혁(Jae Hyuk Lim),임세영(Seyoung Im) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
The variable-node elements enable us to overcome the difficulties of dealing with problems which have nonmatching meshes. In the contact problems, there are many nonmatching nodes along with contact interfaces. These problems can be solved easily using variable-node elements. The contact formulation with the variable-node elements leads to an accurate and effective solution procedure. Therefore, the patch test is passed without any additional treatment. In this work, it is shown that contact analysis is efficiently conducted with the aid of variable-node finite elements in consideration of finite deformations.