Finite Element Analysis of Elasto-Plastic Large Deformation considering the Isotropic Damage (the 1st Report) -Development of Elasto-Plastic Damage Constitutive Model-

J. Ocean Eng. Technol. 2000;14(2):70-75.

등방성 손상을 고려한 탄소성 대변형 문제의 유한요소해석(제1보) -탄소성 손상 구성방정식 개발-

노인식

충남대학교 공과대학

Keywords: continuum damage mechanics, Isotropic damage, State variables, Thermodynamic approach, Plastic damage flow rule, Damage evolution equation

핵심용어: 연속체 손상 역학, 등방성 손상, 상태변수, 열역학적 정식화, 소성 손상 유동법칙, 손상발전식

Abstract

In this paper a new constitutive model for ductile materials was proposed. This model can describe the material degradation due to the evolution of isotropic damage during elasto-platic deformation. The plastic flow rule was derived under the framework of thermodynamic approach of continuum damage mechanics(CDM) in which plastic strain hardening parameters and isotropic damage were taken as thermodynamic state variables. And the process to determine material constants for constitutive model using an experimental data was presented.