Cyclic Stress-strain Hardening Model of AC4C-T6 Alloy at Cryogenic Temperature
극저온 상태에서 AC4C-T6 의 가공 경화 모델 결정에 관한 연구

Jae-Beom Lee, Kyung-Su Kim, Jang-Hyun Lee, Mi-Ji Yoo, Joon-Mo Choung
2009 Journal of the Society of Naval Architects of Korea  
Present study is concerned with the simulation of plasticity models for the cyclic stressstrain behavior of aluminum alloy AC4C-T6 that can be used for primary materials of LNG cargo pump. Material model of cyclic hardening and plasticity for aluminum alloy AC4C-T6 was investigated through experiments and numerical simulations. Monotonic tensile and cyclic tension-compression test under symmetric load cycles was performed at both room temperature and cryogenic temperature of -165 o C. Based on
more » ... -165 o C. Based on the experimental data plastic hardening models were evaluated for isotropic/kinematic/combined hardening. FEA (Finite Element Analysis) models which describe the cyclic stress-strain relationship were evaluated for the simulation of plasticity. An appropriate hardening model is proposed comparing the results of FEA with those of experiments. ※Keywords: LNG cargo pump(액화천연가스 펌프), Cyclic hardening(반복 경화), AC4C-T6, FEA(유한요소해석), Cyclic stress-strain(반복 응력-변형률) 1. 서론
doi:10.3744/snak.2009.46.5.498 fatcat:gvvb4gdcvngdfbvlwo4kwa2hvq