Developing of phenomenological damage model for automotive low-carbon structural steel for using in validation of euroncap frontal impact

Results presented in this paper demonstrate the process of material models development for automotive structural steels in order to implement it into the SUV digital twin. Developed digital twin is capable to simulate vehicle crash impact in the same way as full-scale test but among of many parameters it needs correctly defined material models. One of the most difficult things to develop is failure models which simulate the behavior of real material correctly. Usually standard approach considers using only stress-strain curves for several strain rates that does not follow the requirements of advanced model of digital twin. Implementing of damage theory based GISSMO failure description into the vehicle model, especially for high strain rates, leads to achieving good correlation with full-scale crash tests. Also it helps to improve digital twin's quality and speed up overall process of vehicle developing. As a result of research this paper demonstrated the difference of simulations between usual and improved material models.