Plastic deformation due to high-velocity impact using ordinary state-based peridynamic theory

•Ordinary state-based peridynamic theory is used to account plastic behavior of materials.•The dynamic fracture due to high velocity impact is studied.•The penetration process is investigated at different impact velocities and magnitudes of strain hardening.•The plastic deformation is studied for different projectile shapes. Peridynamic theory is a new and successful method to model the material behavior under impact loading. The bond-based peridynamic approach can be used to study the impact damage for brittle cases, but this method is unable to model the response of a ductile target due to plastic deformation of the structure. To capture the ductile fracture, the advanced class of this theory, called ordinary state-based peridynamic method, can be used. This approach has been previously utilized and described by literature to model the plastic deformation in some simple conditions. The present study aims to investigate the mentioned method to model the plastic deformation caused by high-velocity impact. For this purpose, the ductile behavior of a steel strip induced by high-velocity impact of various projectile shapes is considered. In this regard, the penetration process is studied at different impact velocities and magnitudes of strain hardening. The results show that the employed method can clearly capture the plastic behavior of the steel target and its “edge back” phenomenon. It confirms the ability of the utilized method to simulate the dynamic ductile fracture.