Characterization of commercially pure titanium under supercritical conditions : By means of hybrid numerical-experimental approach

Abstract: Material characterization was addressed by solving the inverse engineering problem to mechanical properties by means of finite element analysis and computational optimization. High-temperature and high strain-rate data from split Hopkinson pressure bar tests on commercially pure titanium were used in the study. The Johnson-Cook flow stress model was selected to characterize the mechanical behavior of the material. By optimizing the model parameters, the force-displacement curve could be reasonably reproduced for the high-temperature bcc phase at strain rates of 1200s−1. A combination of Abaqus finite element simulations and Matlab parameter optimizations has been employed using the program “Abaqus2matlab” for parameter transfer. The approach shows satisfactory results.