A node-to-node scheme with the aid of variable-node elements for elasto-plastic contact analysis

作者：Jin Seungmin; Sohn Dongwoo; Lim Jae Hyuk; Im Seyoung^*

来源：International Journal for Numerical Methods in Engineering, 2015, 102(12): 1761-1783.

DOI：10.1002/nme.4862

• contact analysis
• variable-node elements
• large deformation
• elasto-plasticity
• node-to-node contact scheme

A strategy for a two-dimensional contact analysis involving finite strain plasticity is developed with the aid of variable-node elements. The variable-node elements, in which nodes are added freely where they are needed, make it possible to transform the non-matching meshes into matching meshes directly. They thereby facilitate an efficient analysis, maintaining node-to-node contact during the contact deformation. The contact patch test, wherein the contact patch is constructed out of variable-node elements, is thus passed, and iterations for equilibrium solutions reach convergence faster in this scheme than in the conventional approach based on the node-to-surface contact. The effectiveness and accuracy of the proposed scheme are demonstrated through several numerical examples of elasto-plastic contact analyses.

• 出版日期2015-6-22