期刊
COMPUTER METHODS IN APPLIED MECHANICS AND ENGINEERING
卷 197, 期 51-52, 页码 4882-4893出版社
ELSEVIER SCIENCE SA
DOI: 10.1016/j.cma.2008.07.014
关键词
Generalized finite element method; Mixed finite element method; Lagrange multipliers; Bimaterial solid; Incompressible hyperelasticity
资金
- US Department of Energy [B341494]
An extension of the generalized finite element method to the class of mixed finite element methods is presented to tackle heterogeneous systems with nearly incompressible non-linear hyperelastic material behavior. In particular, heterogeneous systems with large modulus mismatch across the material interface undergoing large strains are investigated using two formulations, one based on a continuous deformation map, the other on a discontinuous one. A bimaterial patch test is formulated to assess the ability of the two formulations to reproduce constant stress fields, while a mesh convergence study is used to examine the consistency of the formulations. Finally, compression of a model heterogeneous propellant pack is simulated to demonstrate the robustness of the proposed discontinuous deformation map formulation. (C) 2008 Elsevier B.V. All rights reserved.
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