Mehrphasige Finite Elemente in der Verformungs- und Versagensanalyse grob mehrphasiger Werkstoffe

Steinkopff, Th.; Sautter, M.; Wulf, J.

doi:10.1007/bf00835664

Cited by 3 publications

(2 citation statements)

References 16 publications

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“…However, comparison with conventional single-phase element models of identical microstructural cut-outs proved that the localization and the magnitude of stress and strain concentrations caused by local phase geometry are in reasonable agreement with multiphase element models, when the net density in the latter model is in the order already required for a correct representation of stress and strain gradients [18]. Our previous studies of deformation and fracture behaviour of heterophase materials [4,18,21] have demonstrated the efficiency of the multiphase element method with respect to model generation, convergence behaviour and reliability of results.…”

Section: The Multiphase Finite-element Techniquementioning

confidence: 67%

“…Finite-element methods (FEM) have proven to be powerful tools for the analysis of inhomogeneous stress and strain distributions in heterophase materials having relatively coarse microstructures (>10 µm) [1][2][3][4][5]. However, up to now these simulations have been restricted to small overall deformation (<10%) for both strongly idealized models ('unitcell' models) and more realistic models of microstructure cut-outs [6].…”

Section: Introductionmentioning

confidence: 99%

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Finite-element simulation of large plastic deformation in heterophase materials

Steinkopff

Sautter

1997

Modelling Simul. Mater. Sci. Eng.

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Two problems are prominent in finite-element (FE) simulations of large plastic deformation in heterophase materials. The first concerns the pre-processing step in which the heterophase structure has to be modelled. The multiphase element method is an effective tool for assigning heterogeneous properties to the FE net. The simulation of large inhomogeneous deformation leads to the second problem. When strain localization has to be reproduced by the finite elements, the geometrical anisotropy of the elements increases and finally enforces remeshing. This includes the interpolation of intermediate results from the old net to the new. The multiphase element method and the Akima interpolation scheme have been implemented for the elasto-plastic plane strain elements of a nonlinear FE software package. Investigations of large-scale plastic deformation for both strongly idealized (`unit-cell') and realistic micro-structures of Ag - Ni composites have been performed, using both the multiphase element technique and the remeshing procedure described here. The comparison with experimental results confirms the serviceability and the power of both methods.

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