Fully integrated EAS-based solid-shell finite elements in implicit sheet metal forming simulations

• Type: Article in International Conference Proceedings Book
• Date: 2005

Authors

valente, raf (Author) Other; parente, mpl (Author) Other; jorge, rmn (Author) FEUP; cardoso, rpr (Author) Other; de sousa, rja (Author) Other

Conference proceedings International

Title: Numisheet 2005: Proceedings of the 6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes, Pts A and B

Pages: 751-756

6th International Conference and Workshop on Numerical Simulation of 3D Sheet Metal Forming Processes

Detroit, MI, AUG 15-19, 2005

Indexing

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Scientific classification

FOS: Engineering and technology > Mechanical engineering

Other information

Authenticus ID: P-000-6C9

DOI: 10.1063/1.2011312

Abstract (EN): In this communication sheet metal forming problems are analyzed with the Finite Element Method and a fully-integrated solid-shell element, based on the Enhanced Assumed Strain (EAS) method. Among the solid-shell element's distinguish features, it should be mentioned the solely use of the EAS approach in dealing with either transverse and volumetric-based locking pathologies, thus avoiding the inclusion of other mixed methods into the formulation. The adopted methodology is then able to successfully deal with small thickness shell problems within the incompressible range, aspects commonly appearing in sheet metal forming modeling with solid elements. Simulations of this type of forming processes are mainly solved resorting to membrane and shell-type finite elements, included in explicit commercial programs. Nevertheless, the presented solid-shell formulation, within a fully implicit approach, provides reliable solutions when compared to experimental results. It is also worth mentioning that the present solid-shell formulation encompasses a minimum set of enhancing strain variables, if compared to other fully integrated hexahedral finite elements in the literature. In order to assess the performance of the presented formulation, the S-Rail Forming problem of an aluminum alloy is described and analyzed, with the results being compared to experimental and numerical simulation data.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 6