Sensitivity analysis of quantitative fracture criterion based on the results of the SICO test

Results of numerical simulation of the SICO test, including the resistance heating of samples and metal flow during the test, are described in this paper. The main goal of the work is the determination of the sensitivity of fracture criteria with respect to the test parameters: temperature, die velocity and material parameters—strain rate sensitivity, hardening coefficient, hardening exponent and temperature sensitivity coefficient. It was shown in earlier research that sensitivity analysis allowed the determination of the extent that the value of the fracture criterion changes with change of the SICO test parameters. Beyond this, the sensitivity analysis reveals which parameters interact with each other. This information is crucial for the inverse analysis if larger numbers of parameters are optimized. The present work is an extension of the authors’ earlier research and the variance-based method with correlation ratios is used in the analysis. The results of this analysis contribute to development of more efficient optimization algorithms in the inverse method.