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By Mr (h: G (s, F. (i-pavi-mc) Da Veiga, L. Beirão [beirão Da Veiga, Lourenço (i-milan, A. (i-cnr-ima) Lovadina, Ro (i-pavi-mc) Sangalli, C. Amrouche, C. Bemardi, M. Dauge and V. Girault


A fully “locking-free ” isogeometric approach for plane linear elasticity problems: a stream function formulation. (English summary) Comput. Methods Appl. Mech. Engrg. 197 (2007), no. 1-4, 160–172. Summary: “In this paper, we study plane incompressible elastic problems by means of a ‘streamfunction’ formulation such that a divergence-free displacement field can be computed from a scalar potential. The numerical scheme is constructed within the framework of NURBS-based isogeometric analysis and we take advantage of the high continuity guaranteed by NURBS basis functions in order to obtain the displacement field from the potential differentiation. As a consequence, the numerical scheme obtained is automatically locking-free in the presence of the incompressibility constraint. A discontinuous Galerkin approach is proposed to deal with multiple mapped, possibly multiply connected, domains. Extensive numerical results are provided t

Year: 2013
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