A bond-based peridynamic model has been reported dynamic fracture characteristic of brittle materials through a simple constitutive model. In the model, each bond is assumed to be a simple spring operating independently. As a result, this simple bond interaction modeling restricts the material behavior having a fixed Poisson’s ratio of 1/4 and not being capable of expressing shear deformation. We consider a state-based peridynamics as a generalized peridynamic model. Constitutive models in the state-based peridynamics are corresponding to those in continuum theory. In state-based peridynamics, thus, the response of a material particle depends collectively on deformation of all bonds connected to other particles. So, a state-based peridynamic theory can represent the volume and shear changes of the material. In this paper, the perfect plasticity is considered to express plastic deformation of material by the state-based peridynamic constitutive model with perfect plastic flow rule. The elastic-plastic behavior of the material is verified through the stress-strain curves of the flat plate example. Furthermore, we simulate the high-speed impact on 3D granite model with a nonlocal contact modeling. It is observed that the damage patterns obtained by peridynamics are similar to experimental observations.

Abstract
 1. 서 론
 2. 상태 기반 페리다이나믹 탄소성 모델링
  2.1 상태 기반 페리다이나믹 모델
  2.2 페리다이나믹 완전 소성모델 (perfect plasticity)
  2.3 비국부 접촉(nonlocal contact) 모델
 3. 수치예제
  3.1 페리다이나믹 소성 모델 검증
  3.2 화강암반의 고속충돌 파괴 해석
 3. 결 론
 References
 요 지

• 하윤도(군산대학교 조선해양공학과) | Youn Doh Ha (Department of Naval Architecture and Ocean Engineering, Kunsan National Univ.) Corresponding author