Adaptive anisotropic integration scheme for high‐order fictitious domain methods: Application to thin structures. (5th February 2018)

• Record Type: Journal Article
• Authors: Legrain, G.; Moës, N.
• Is Part Of: International journal for numerical methods in engineering. Volume 114:Number 8(2018)
• Page Start: 882
• Page End: 904
• Publication Date: 2018-02-05
• Subjects: anisotropic meshing -- fictitious domain -- high order -- shell -- solid shell -- X‐FEM; Numerical analysis -- Periodicals; Engineering mathematics -- Periodicals; 620.001518
• DOI: 10.1002/nme.5769
• Languages: English
• ISSNs: 0029-5981

Abstract

Summary: A novel integration scheme is proposed for fictitious domain finite element methods. It relies on the use of a surface tracking strategy based on anisotropic mesh adaptation. Thanks to an error estimator, the method builds iteratively an adapted anisotropic mesh that is refined near the geometrical interface and elongated in the direction of a small curvature. This strategy allows to decrease the integration cost, which can be problematic for high‐order fictitious domain methods. In addition, it opens the possibility for the creation of unfitted solid shell strategies that can be used for the treatment of thin structures. Numerical studies show that the method leads to promising results for both integration cost and behavior with respect to locking.