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2 Engineering Transactions

2 1999

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A modified flow field in the extrusion of bimetallic systems

100%

Śliwa R. E. , Mishuris G. S.

1999

tom Vol. 47, iss. 2

203-215

The aim of the paper is to propose a new kinematically admissible velocity field corresponding to experimental results of the co-extrusion of various materials. A modified mathematical description of the plastic flow in the extrusion of the bi-metallic composite including boundaries of the plastic zone described by appropriate function has been proposed. Velocities, grid distortion and strain rate distribution have been calculated by taking into account information on the plastic zone boundaries and their forms. Excellent agreement between the analytical and the experimental results of the plastic flow of longitudially oriented metal composite has been established.

Some kinematically admissible velocity fields in multimaterial extrusion

100%

Mishuris G. S. , Śliwa R. E.

1999

tom Vol. 47, iss. 3

369-387

Two different models of flow fields are proposed to describe plastic deformations during the extrusion of multi-metal composites. To construct the presented kinematically admissible flow fields, some information is adopted from experimental works concerning extrusion of longitudially oriented metal composites. Formulae for velocities, strain-rate tensor and deviator of stresses are found.