Influence of material properties on the performance of blast-loaded steel plates with pre-cut defects

Experimental and numerical investigations are carried out to determine how thin steel plates with pre-cut defects behave under blast loading. The considered in this study represented by four square holes, symmetrically distributed around the centre of target plates. were manufactured from two types steel, i.e., a dual-phase medium strength high-strength martensitic steel. A shock tube facility was used expose blast-like loading conditions. experiments showed that both resistance corresponding fracture mode changed material properties. Numerical simulations performed using finite element code LS-DYNA, where results found be good agreement experimental data predicting ductile during blast-structure interaction. confirmed significant work hardening will distribute plasticity throughout plate deformation, while limited tend localize earlier fracture.