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On the mesh dependence of non-linear mechanical finite element analysis

Ochsner, Andreas and C., Veyhl and I. V., Belova and G. E., Murch and T., Fiedler (2010) On the mesh dependence of non-linear mechanical finite element analysis. Finite Elements in Analysis and Design, 46 (5). 371 -378. ISSN 0168-874X

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Official URL: http://dx.doi.org/10.1016/j.finel.2009.12.003

Abstract

This paper addresses the mesh-dependence of non-linearmechanicalfiniteelementanalysis. To this end, finiteelementmeshes that are assembled by various element types and their solutions are compared. Voxel, tetrahedron, hexahedron and mixed (hex-dominant) meshes are considered. Different benchmarking parameters for the elastic and plastic solutions as well as for the computational load are determined. First, bending beams with a square, a circular and a rail cross-section are calculated accounting for non-linear material behaviour (plasticity). A strong dependence on the mesh type is observed and the best results are obtained for mixed meshes and hexahedron-only meshes. In the second part of this study, finiteelement models that are based on the complex geometry of metallic foam are considered. Computed tomography data is used to generate geometrically complex finiteelement models and a convergence analysis is performed. Again, superior performance is found for mixed meshes.

Item Type:Article
Uncontrolled Keywords:finiteelement method, plasticity, beam, mesh comparison, mixed (hex-dominant) mesh, hexahedral mesh
Subjects:T Technology > TJ Mechanical engineering and machinery
Divisions:Mechanical Engineering
ID Code:26589
Deposited By: Liza Porijo
Deposited On:18 Jul 2012 03:26
Last Modified:21 Aug 2014 02:13

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