Mechanical contact by constraints and split-based preconditioning

Dmitry Karpeyev ; Derek Gaston ; Jason Hales ; Steven Novascone

关键词: BISON;    MOOSE;    NEAMS;   

DOI  :  10.2172/1134842
RP-ID  :  INL/EXT-14-31699
PID  :  OSTI ID: 1134842

学科分类：社会科学、人文和艺术（综合）

美国|英语

来源: SciTech Connect

【 摘 要 】

An accurate implementation of glued mechanical contact was developed in MOOSE based on its Constraint system. This approach results in a superior convergence of elastic structure problems, in particular in BISON. Adaptation of this technique to frictionless and frictional contact models is under way. Additionally, the improved convergence of elastic problems results from the application of the split-based preconditioners to constraint-based systems. This yields a substantial increase in the robustness of elastic solvers when the number of nodes in contact is increased and/or the mesh is refined.