|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Damage Evolution in DP600 Sheets Using a Combined Finite Element – Cellular Automata Model
||Iman Sari Sarraf, Daniel E. Green , Yang Song, Javad Samei
|On-Site Speaker (Planned)
||Iman Sari Sarraf
Modelling the damage and fracture behaviour of engineering materials with composite microstructures such as dual phase (DP) steels requires a thorough understanding of not only macro-scale mechanical properties but also microstructural features and characteristics. Quasi-static and high strain rate uniaxial tension tests were carried out to determine the flow curves of DP600 steel sheets and calibrate the constitutive models. Then, electrohydraulic forming test data was used to validate the numerical results. In addition, metallographic examinations were conducted to quantify the material microstructural properties. Subsequently, the Rousselier damage model with a modified Johnson-Cook hardening function was used to determine macro-scale strain, and the ductile and brittle cell arrays were used to determine if each element still has load bearing capacity. The proposed model can be effectively used to evaluate the effect of process parameters and microstructural features such as ferrite grain size on the onset of localization and fracture of DP steel sheets.
||Definite: At-meeting proceedings