Finite Element Analysis of Elasto-Plastic Large Deformation considering the Isotropic Damage(the 2nd Report)

J. Ocean Eng. Technol. 2000;14(2):76-83.

등방성손상을 고려한 탄소성 대변형 무제의 유한요소해석(제2보)

이종원

한국기계연구원

Keywords: Continuum damage mechanics, Isotropic damage, Plastic damage, Elasto-plastic large deformation, Nonlinear finite element formulation process

핵심용어: 연속체 손상역학, 등방성 손상, 소성 손상, 탄소성 대변형, 비선형 유한 요소법 정식화 대변형

Abstract

this paper was concentrated on the finite element formulation to solve boundary value problems by using the isotropic elasto-plastic damage constitutive model proposed previously(Noh, 2000) The plastic damage of ductile materials is generally accompanied by large plasticdeformation and strain. So nonlinearity problems induced by large deformation large rotation and large strain behaviors were dealt with using the nonlinear kinematics of elasto-plastic deformations based on the continuum mechanics. The elasto-plastic damage constitutive model was applied to the nonlinear finite element formulation process of Shin et al(1997) and an improved analysis model considering the all nonlinearities of structural behaviors is proposed. Finally to investigate the applicability and validity of the numerical model some numerial examples were considered.