Texture-Based Explicit Finite-Element Analysis of Sheet Metal Forming

Ristic, Svetlana; Shen, He; Bael, Albert Van; Houtte, Paul Van

doi:10.4028/www.scientific.net/msf.495-497.1535

Cited by 6 publications

(2 citation statements)

References 9 publications

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“…Experience with the Quantic method has shown that n in G n as given by Eq. (4)-(6) should be at least 4, preferably 6 (Van Bael et al, 2003;Ristic et al, 2005). G n as given by Eq.…”

Section: Identification Of the Parametersmentioning

confidence: 99%

The Facet method: A hierarchical multilevel modelling scheme for anisotropic convex plastic potentials

Houtte

Yerra

Bael

2009

International Journal of Plasticity

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“…Experience with the Quantic method has shown that n in G n as given by Eq. (4)-(6) should be at least 4, preferably 6 (Van Bael et al, 2003;Ristic et al, 2005). G n as given by Eq.…”

Section: Identification Of the Parametersmentioning

confidence: 99%

The Facet method: A hierarchical multilevel modelling scheme for anisotropic convex plastic potentials

Houtte

Yerra

Bael

2009

International Journal of Plasticity

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“…A mathematical criterion could be formulated to ensure the overall convexity of the yield surface, and an iterative algorithm was proposed to slightly modify the fitted parameters in order to satisfy that criterion. The Quantic method has been implemented in both implicit and explicit finite-element software programs through user material routines [9]. In spite of the guaranteed convexity and the resulting reliability of the method, the Quantic method has the drawback of being formulated in strain rate space but not in stress space.…”

Section: Introductionmentioning

confidence: 99%

The facet method for plastic anisotropy of textured materials

2008

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The Facet method is a new approach to implement the plastic anisotropic behaviour of polycrystalline materials in finite-element models for simulating metal forming processes. It employs analytical expressions of plastic potentials in strain rate space and/or stress space. The parameters in these expressions are obtained by fitting to the predictions of a multilevel model for the plastic deformation of a textured material. The resulting equipotential surfaces in strain rate space and yield loci in stress space are automatically convex. Examples of q-values and uniaxial yield stress variations as obtained with the Facet method in combination with the Taylor theory are shown for three industrial sheet metals. The results are compared to the ones calculated directly from the Taylor theory and those obtained with the Quantic method.

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Explicit coupled thermo‐mechanical finite element model of steel solidification

Korić

Hibbeler

Thomas

2008

Numerical Meth Engineering

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SUMMARYThe explicit finite element method is applied in this work to simulate the coupled and highly non-linear thermo-mechanical phenomena that occur during steel solidification in continuous casting processes. Variable mass scaling is used to efficiently model these processes in their natural time scale using a Lagrangian formulation. An efficient and robust local-global viscoplastic integration scheme (Int. J. Numer. Meth. Engng 2006; 66:1955-1989) to solve the highly temperature-and rate-dependent elasticviscoplastic constitutive equations of solidifying steel has been implemented into the commercial software ABAQUS/Explicit (ABAQUS User Manuals v6.7. Simulia Inc., 2007) using a VUMAT subroutine. The model is first verified with a known semi-analytical solution from Weiner and Boley (J. Mech. Phys. Solids 1963; 11:145-154). It is then applied to simulate temperature and stress development in solidifying shell sections in continuous casting molds using realistic temperature-dependent properties and including the effects of ferrostatic pressure, narrow face taper, and mechanical contact. Example simulations include a fully coupled thermo-mechanical analysis of a billet-casting and thin-slab casting in a funnel mold. Explicit temperature and stress results are compared with the results of an implicit formulation and computing times are benchmarked for different problem sizes and different numbers of processor cores. The explicit formulation exhibits significant advantages for this class of contact-solidification problems, especially with large domains on the latest parallel computing platforms.

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Texture-Based Explicit Finite-Element Analysis of Sheet Metal Forming

Cited by 6 publications

References 9 publications

The Facet method: A hierarchical multilevel modelling scheme for anisotropic convex plastic potentials

The Facet method: A hierarchical multilevel modelling scheme for anisotropic convex plastic potentials

The facet method for plastic anisotropy of textured materials

Explicit coupled thermo‐mechanical finite element model of steel solidification

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