- Ni-Ti 형상기억합금 선재의 인발 공정 후 형상회복 예측에 관한 연구
- ㆍ 저자명
- 김상현,이경훈,이선봉,염종택,박찬희,김병민,Kim. S.H.,Lee. K.H.,Lee. S.B.,Yeom. J.T.,Park. C.H.,Kim. B.M.
- ㆍ 간행물명
- 소성가공
- ㆍ 권/호정보
- 2013년|22권 8호|pp.470-476 (7 pages)
- ㆍ 발행정보
- 한국소성가공학회
- ㆍ 파일정보
- 정기간행물| PDF텍스트
- ㆍ 주제분야
- 기타
The aim of the current study was to predict shape recovery behavior of Ni-Ti shape memory alloy (SMA) wire after loading-unloading and after wire drawing. The superelasticity of SMA was analyzed by a hyper-elastic model for the Mullins effect using ABAQUS. Firstly, tensile tests and loading-unloading tests of the Ni-Ti SMA wire with a diameter 1.0 mm were performed using an MTS servo-hydraulic tester. The parameters for the Mullins effect were computed by ABAQUS based on curve-fitting of the loading-unloading test data. The proposed FE-model predicted the shape recovery of Ni-Ti SMA after wire drawing. Finally, the effectiveness of the model was verified by drawing experiments. The wire drawing experiments using the Ni-Ti SMA were conducted on a drawing machine(1ton, 50mm/s). In order to evaluate the shape recovery of Ni-Ti SMA, the drawn wires are annealed for 30min at $450^{circ}C$.