TY - JOUR N2 - The following discussion concerns modelling of fracture in steel plates during an impact test, in which both target and striker are manufactured from the same material, high-strength high-hardness armour steel – Mars® 300. The test conditions (3 mm thick targets, projectiles with different nose shapes at impact velocity lower than 400 m/s) result in severely damaged components, which results in an analysis of stress states showing material failure. Numerical analyses are performed using two material models: the Johnson-Cook approach, as traditionally used in impact simulations, accounting for the effect of stress triaxiality, strain rate and temperature and for comparison, a simulation by means of the stress triaxiality and Lode angle parameter-dependent Hosford-Coulomb model, also incorporating the effect of the strain rate on a fracture initiation. The aim of the study is to analyse the mechanisms of penetration and perforation observed in the armour steel plates and validation of the modelling approaches. L1 - http://journals.pan.pl/Content/116298/PDF/17D_317-325_01315_Bpast.No.68-2_29.04.20_KA_TeX.pdf L2 - http://journals.pan.pl/Content/116298 PY - 2020 IS - No. 2 (i.a. Special Section on Computational Intelligence in Communications) EP - 325 DO - 10.24425/bpasts.2020.133120 KW - armour steel KW - Lode angle parameter KW - stress triaxiality KW - Hosford-Coulomb model KW - Johnson-Cook model A1 - Fras, T. A1 - Roth, C.C. A1 - Mohr, D. VL - 68 DA - 30.04.2020 T1 - Application of two fracture models in impact simulations SP - 317 UR - http://journals.pan.pl/dlibra/publication/edition/116298 T2 - Bulletin of the Polish Academy of Sciences Technical Sciences ER -