Reference : Linear smoothing over arbitrary polytopes for compressible and nearly incompressible ...
Scientific congresses, symposiums and conference proceedings : Unpublished conference
Engineering, computing & technology : Multidisciplinary, general & others
Computational Sciences
http://hdl.handle.net/10993/24166
Linear smoothing over arbitrary polytopes for compressible and nearly incompressible linear elasticity
English
Natarajan, Sundararajan [Indian Institute of Technology-Madras > Department of Mechanical Engineering > > Assistant Professor]
Tomar, Satyendra mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Bordas, Stéphane mailto [University of Luxembourg > Faculty of Science, Technology and Communication (FSTC) > Engineering Research Unit >]
Francis, Amrita []
Ortiz-Bernardin, Alejandro [University of Chile > Department of Mechanical Engineering > > Assistant Professor]
Jun-2016
No
International
ECCOMAS 2016
5-07-2016 to 10-07-2016
Crete Island
Greece
[en] Arbitrary polytopes ; near incompressible ; linear elasticity ; up formulation ; compressible ; linear smoothing ; smoothed finite element method ; cell based smoothing ; volume average
[en] We present a displacement based approach over arbitrary polytopes for compressible and nearly incompressible linear elastic solids. In this approach, a volume-averaged nodal projection operator is constructed to project the dilatational strain into an approximation space of equal or lower-order than the approximation space for the displacement field, resulting in a locking-free method. The formulation uses the usual Wachspress interpolants over arbitrary polytopes and the stability of the method is ensured by the addition of bubble like functions. The smoothed strains are evaluated based on the linear smoothing procedure. This further softens the bilinear form allowing the procedure to search for a solution satisfying the divergence- free condition. The divergence-free condition of the proposed approach is verified through systematic numerical study. The formulation delivers optimal convergence rates in the energy and L2-norms. Inf-sup tests are presented to demonstrated the stability of the formulation.
Others
http://hdl.handle.net/10993/24166

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