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논문 기본 정보

자료유형
학술대회자료
저자정보
A. Ben Bettaieb (University of Liège) L. Duchêne (University of Liège) L. Zhang (University of Liège) A.M. Habraken (University of Liège)
저널정보
한국소성·가공학회 기타자료 The 8th International Conference and Workshop on numerical simulation of 3D seet metal forming processes (NUMISHEET 2011)
발행연도
2011.8
수록면
374 - 381 (8page)

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We present in this paper a new eight node solid-shell finite element called SSH3D (Three Dimensional Solid-Shell). This element is currently implemented in the frame of the in-house research code called LAGAMINE. Here the Enhanced Assumed Strain (EAS) technique based on the Hu-Washizu variational principle, described in [1] and [2], is used to cure the volumetric locking occurring when the material shows nearly incompressible behavior and Poisson’s thickness locking caused by the high aspect ratio of the finite element. In the proposed element, the EAS technique can be combined with the Assumed Natural Strain (ANS) [3-5] concept to treat shear locking caused by the transverse shear strain and curvature thickness locking caused by the transverse normal strain. Different schemes for the ANS concept are implemented while the number of integration points and the number of EAS modes are element parameters (the element uses four integration points in the plane of the element and at least two integration points through the thickness direction in a single element layer). These features must be adjusted by the user according to the studied process (geometry and loading) so as to avoid locking and limit the calculation time. This element was successfully tested and the numerical remedies were verified using several kinds of patch tests. A double sided contact problem is modeled in order to investigate the performance and accuracy of the developed element and to validate the suggested approach.

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Abstract
INTRODUCTION
EAS AND ANS ELEMENTS
NUMERICAL RESULTS OF THE SOLID-SHELL ELEMENT
REFERENCES

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