The　present　research　establishes　a　two-step　strategy　to　incorporate　classical　elastoplastic　constitutive　model　into　ordinary　state-based　peridynamics　(OSB-PD)　for　ductile　fracture　analysis.　Three　length　levels　are　notified,　respectively,　bond　level,　material　particle　level　and　bulk　level.　The　unified　Bodner-Partom　theory　is　incorporated　into　the　OSB-PD　framework　to　define　the　bondwise　relationship　between　deformation　state　and　force　state.　Particle-wise　variables　indicating　plastic　deformation　state　are　extracted　from　connecting　bonds　to　establish　the　unified　ductile　damage　model　at　particle　level.　The　damage　indicator　in　turn　exerts　effects　on　the　following　plastic　deformation.　At　present　study,　the　collaboration　among　PD　and　unified　theories　amplifies　the　theoretical　unity　of　PD　in　defining　material　behaviors.　Simulations　under　quasi-static　and　impact　loading　conditions　are　carried　out　to　demonstrate　the　effectiveness　of　the　present　model　in　reproducing　ductile　fractures　at　bulk　level.　©　2023,　Association　of　American　Publishers.　All　rights　reserved.