Proceedings of the Korean Society for Technology of Plasticity Conference (한국소성가공학회:학술대회논문집)
- 2009.05a
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- Pages.330-333
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- 2009
Time-Dependent Spring-back Prediction of Aluminum Alloy 6022-T4 Sheets Using Time-Dependent Constitutive law
시간 의존성 구성방정식을 이용한 AA6022-T4 판재의 탄성 복원 예측
- Park, T. ;
- Ryou, R. ;
- Lee, M.G. ;
- Chung, K.H. (POSCO) ;
- Wagoner, R.H. (Ohio state University) ;
- Chung, K.
- 박태준 (서울대학교 재료공학부) ;
- 류한선 (삼성전자) ;
- 이명규 (한국기계연구원 부설 재료연구소) ;
- 정경환 (포스코) ;
- ;
- 정관수 (서울대학교)
- Published : 2009.05.07
Abstract
The time-dependent constitutive law was developed based on viscoelastic-plasticity to describe the time-dependent spring-back behavior of aluminum alloy 6022-T4 sheets. Besides nonlinear viscoelasticity, non-quadratic anisotropic yield function, Yld2000-2d, was used to account for the anisotropic yield behavior, while the combined isotropic-kinematic hardening law was used to represent the Bauschinger effect and transient hardening. For verification purposes, finite element simulations were performed for the draw-bending and the results were compared with experimental results.
Keywords
- Time-dependent spring-back;
- Viscoelasticity;
- Combined isotropic-kinematic hardening;
- Anisotropic yield function;
- AA6022-T4;
- Draw-bending tests