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EXPLICIT SIMULATIONS WITH REDUCED INTEGRATION SOLID-SHELL ELEMENTS: STABILIZATION AND SELECTIVE MASS SCALING

Pagani, M.; Perego, U.; Reese, S.;

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Explicit approaches are usually preferred for the simulation of thin walled structural problems, which are often highly nonlinear due to large deformations and possible material inelasticity. Solid-shell elements can describe the correct thickness geometry and are therefore more suitable than standard shell elements for the implementation of complex 3D material models. However, they include a too simple kinematic formulation leading to artificial stiffening phenomena called locking. To overcome this problem computationally expensive corrections, e.g. introducing enhanced strains, are required which suggest the use of reduced integration with hourglass stabilization. Furthermore, a high element maximum eigenfrequency is implied by the small thickness, leading to overly small stable time-steps. These two issues are addressed in this paper where a stabilized reduced integration solidshell element and a selective mass scaling technique for the reduction of the maximum eigenfrequency are proposed.

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Palavras-chave: Solid-shell elements, Explicit dynamics, Hourglass stabilization, Selective massscaling.,

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DOI: 10.5151/meceng-wccm2012-18821

Referências bibliográficas
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Como citar:

Pagani, M.; Perego, U.; Reese, S.; "EXPLICIT SIMULATIONS WITH REDUCED INTEGRATION SOLID-SHELL ELEMENTS: STABILIZATION AND SELECTIVE MASS SCALING", p. 2350-2361 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1]. São Paulo: Blucher, 2014.
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18821

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