A finite element analysis for the least temperature rise in a hot torsion test specimen

摘要

The temperature distribution in a hot torsion specimen, caused by plastic deformation, is predicted by a finite element analysis with the aim of obtaining an optimum specimen geometry that would produce the least heat accumulation during twisting so as to avoid the possible flow localization and to facilitate the interpretation of the data obtained. The prediction of temperature rise is made for an aluminium alloy 5252 for different twist rate, initial temperature and specimen geometry, from which a procedure for the least heat generation is suggested. The constitutive equations are modified for the unavoidable temperature rise and the predictions so obtained are compared with the experimental data.