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Analysis using higher-order XFEM: implicit representation ofgeometrical features from a given parametric representation

Published online by Cambridge University Press:  20 June 2014

M. Moumnassi ,
S.P.A. Bordas ,
R. Figueredo  and
P. Sansen
M. Moumnassi*
Affiliation:
ESIEE-Amiens, 14 quai de la Somme, 80082 Amiens Cedex 2, France
S.P.A. Bordas*
Affiliation:
School of Engineering, Institute of Mechanics and Advanced Materials, Cardiff University, Queen’s Buildings, The Parade, Cardiff CF24 3AA, UK
R. Figueredo
Affiliation:
ESIEE-Amiens, 14 quai de la Somme, 80082 Amiens Cedex 2, France
P. Sansen
Affiliation:
ESIEE-Amiens, 14 quai de la Somme, 80082 Amiens Cedex 2, France
*
a Corresponding author:[email protected]
b[email protected]
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Abstract

We present a promising approach to reduce the difficulties associated with meshingcomplex curved domain boundaries for higher-order finite elements. In this work,higher-order XFEM analyses for strong discontinuity in the case of linear elasticityproblems are presented. Curved implicit boundaries are approximated inside an unstructuredcoarse mesh by using parametric information extracted from the parametric representation(the most common in Computer Aided Design CAD). This approximation provides local gradedsub-mesh (GSM) inside boundary elements (i.e. an element split by the curved boundary)which will be used for integration purpose. Sample geometries and numerical experimentsillustrate the accuracy and robustness of the proposed approach.

Keywords

Higher-order XFEMcurved boundaryparametric functionsimplicit boundary representationgraded sub-mesh (GSM)
Type
Research Article
Information
Mechanics & Industry , Volume 15 , Issue 5 , 2014 , pp. 443 - 448
Copyright
© AFM, EDP Sciences 2014

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