New quadratic solid-shell elements and their evaluation on popular benchmark problems

Farid Abed-Meraim (1) , Vuong-Dieu Trinh (2, 1) , Alain Combescure (3)

1 LEM3 - Laboratoire d'Etude des Microstructures et de Mécanique des Matériaux
2 LAMSID - UMR 8193 - Laboratoire de Mécanique des Structures Industrielles Durables
3 LaMCoS - Laboratoire de Mécanique des Contacts et des Structures [Villeurbanne]

In recent years, considerable effort has been devoted to the development of 3D finite elements able to model thin structures (Cho et al., 1998; Sze and Yao, 2000; Abed-Meraim and Combescure, 2002; Vu-Quoc and Tan, 2003; Chen and Wu, 2004). To this end, coupling solid and shell formulations proved to be an interesting strategy, providing continuum finite element models that can be efficiently used for structural applications. In the present work, two solid-shell elements are formulated (a 20-node and a 15-node element) based on a purely three-dimensional approach. The advantages of these elements are shown through the analysis of various structural problems. Note that their main advantage is to allow complex structural shapes to be simulated without classical problems of connecting zones meshed with different element types. These solid-shell elements have a special direction called the “thickness”, along which a set of integration points are located. Reduced integration is also used to prevent some locking phenomena and to increase computational efficiency. Focus will be placed here on linear benchmark problems, where it is shown that these solid-shell elements perform much better than their counterparts, conventional solid elements.

Mots clés: Quadratic Solid-Shell; Reduced Integration; Assumed Strain Method; Benchmark Problems

Domaines: Génie des procédés; Matériaux; Mécanique [physics.med-ph]; Génie mécanique [physics.class-ph]; Matériaux et structures en mécanique [physics.class-ph]; Mécanique des matériaux [physics.class-ph]; Mécanique des solides [physics.class-ph]; Mécanique des structures [physics.class-ph]; Vibrations [physics.class-ph]

Farid Abed-Meraim, Vuong-Dieu Trinh, Alain Combescure. New quadratic solid-shell elements and their evaluation on popular benchmark problems. 3rd European Seminar on Computing (ESCO 2012), Jun 2012, Pilsen, Czech Republic. ⟨hal-01238038⟩