Adaptive FEM computation of forming processes - application to porous and non-porous materials. (English) Zbl 0716.73084

Zienkiewicz, O. C.; Huang, G. C.; Liu, Y. C.

Int. J. Numer. Methods Eng. 30, No. 8, 1527-1553 (1990).

Summary: This paper presents the ‘flow formulation’ approach applicable to both compressible and incompressible forming analysis. Appropriate error estimates and adaptive remeshing schemes are described for updated coordinate analysis. Several numerical examples are given. These are backward-forward extrusion and thermally coupled extrusion of pore-free materials, followed by cylinder upsetting, and tapered die extrusion of porous materials. The simulation of the deformation is shown as well as the distribution of effective strain and density at different time stages. The procedures are automatic and are incorporated in a general purpose code FEMMETA.

MSC:

74S05	Finite element methods applied to problems in solid mechanics
74E30	Composite and mixture properties
74C99	Plastic materials, materials of stress-rate and internal-variable type

Keywords:

flow formulation approach; compressible; incompressible forming analysis; Appropriate error estimates; adaptive remeshing schemes; updated coordinate analysis; backward-forward extrusion; thermally coupled extrusion; pore-free materials; cylinder upsetting; tapered die extrusion; code FEMMETA

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