Calibration of the Induction Heating System for Dynamic Compression Test

Abstract

The study focuses on calibrating a system for inductive heating of samples before performing dynamic compression tests using a Split Hopkinson Pressure Bar (SHPB). In the proposed set-up, the crucial role is played by the pyrometer, which could continuously control the temperature of the specimen during the test. The coupling of the experimental test together with numerical simulations (including thermal and mechanical simulations) is performed to calibrate the considered system. The key outcomes of the coupled experiment and simulation analyses are the shortest heating time required to achieve a uniform temperature in the neck of the sample and the change in the temperature field during cooling (after the heating ends). This procedure will also be used in real experiments to predict the temperature sensitivity of the material under dynamic compression under precisely controlled thermal conditions for a temperature range of 250 °C to 730 °C.