Maio 2014 vol. 1 num. 1 - 10th World Congress on Computational Mechanics
Full Article - Open Access.
AN EXPLICIT DYNAMICS APPROACH TO THE SIMULATION OF CRACK PROPAGATION IN THIN SHELLS USING REDUCED INTEGRATION SOLID-SHELL ELEMENTS
Fracture propagation in laminated shell structures, due to impact or cutting, is a highly nonlinear problem which is more conveniently simulated using explicit finite element approaches. Solid-shell elements are better suited for the discretization in the presence of complex material behavior and delamination, since they allow for a correct representation of the through the thickness stress. In the presence of cutting problems with sharp blades, classical crack-propagation approaches based on cohesive interfaces may prove inadequate. New “directional” cohesive interface elements are here proposed to account for the interaction with the cutter edge. The element small thickness leads to very high eigenfrequencies, which imply overly small stable time-steps. A new selective mass scaling technique is here proposed to increase the time-step without affecting accuracy.
Palavras-chave: Cutting, Explicit Dynamics, Crack Propagation, Mass Scaling, Solid-Shell Elements.,
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Pagani, M.; Perego, U.; "AN EXPLICIT DYNAMICS APPROACH TO THE SIMULATION OF CRACK PROPAGATION IN THIN SHELLS USING REDUCED INTEGRATION SOLID-SHELL ELEMENTS", p. 1576-1586 . In: In Proceedings of the 10th World Congress on Computational Mechanics [= Blucher Mechanical Engineering Proceedings, v. 1, n. 1].
São Paulo: Blucher,
ISSN 2358-0828, DOI 10.5151/meceng-wccm2012-18478
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