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An efficient method of analysis of heat transfer during plane strain upsetting of a viscoplastic strip
Author(s) -
Alexandrov Sergei,
Miszuris Wiktoria,
Lang Lihui
Publication year - 2019
Publication title -
zamm ‐ journal of applied mathematics and mechanics / zeitschrift für angewandte mathematik und mechanik
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.449
H-Index - 51
eISSN - 1521-4001
pISSN - 0044-2267
DOI - 10.1002/zamm.201700313
Subject(s) - viscoplasticity , materials science , mechanics , plane stress , deformation (meteorology) , heat transfer , plasticity , yield surface , stress (linguistics) , plane (geometry) , stream function , composite material , geometry , thermodynamics , constitutive equation , finite element method , physics , mathematics , linguistics , philosophy , vorticity , vortex
A solution for the transient heat transfer during plane strain upsetting of a viscoplastic strip has been developed using a Lagrangian coordinate system and the Green's function available in the literature. A general approximate solution for stress and velocity found elsewhere has been used. In contrast to conventional viscoplastic models adopted in theoretical analyses of metal forming processes, the model considered in the present paper includes a saturation stress. This model used in the conjunction with the maximum friction law predicts the localization of plastic deformation in the vicinity of the friction surface. In turn, localized plastic deformation and temperature are responsible for the generation of a very narrow layer with drastically modified microstructure near the friction surface. The appearance of such layers is reported in numerous experimental works.