A new method for predicting the peak temperature evolution in the adiabatic shear
band (ASB) of steel is proposed to overcome the drawback of the traditional
method’s underestimation of the peak temperature in the ASB. The average shear
strain of a thin-walled tube in torsion is divided into three parts: the elastic shear
strain, the average plastic shear strain outside the ASB, and the average plastic shear
strain of the ASB. The relation between the shear stress acting on the tube
and the average shear strain of the tube is established. The postpeak shear
stress-average shear strain curve of the ASB is found to be dependent on the gage
length. As an example, the shear stress-average plastic shear strain curve of
the ASB is back-calculated from the measured shear stress-average shear
strain curve of an AISI 1018 cold rolled steel tube. The peak temperature
and average temperature in the ASB are calculated and compared with
the experimental result. It is found that the calculated peak temperature
is closer to or slightly higher than the experimental result. The latter is a
satisfactory result due to the underestimated peak temperature in the ASB in
experiments.
