Showing papers by "Shiro Kobayashi published in 1980"

TL;DR: In this paper, a thermodynamic theory of deformation using internal variables is adapted to rigid viscoplastic materials, and the formulations for finite element discretization are given specifically for metal forming problems.

TL;DR: In this article, the finite element formulations for coupled analysis of deformation and heat transfer are applied to the problems of solid cylinder compression and ring compression, and the results of ring compression of aluminum at elevated temperature are compared with experimental observations as well as with calculated results not including the temperature effects.

TL;DR: In this article, a sheet bending between the die and the punch is analyzed as a bulk deformation process under the plane-strain condition by the finite-element method, and the two finite element formulations used for the analysis are the rigid-plastic analysis using the incremental theory and the elastoplastic analysis with large-stain formulation.