- Volume 38 Issue 7
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Investigation of Residual Stress Distributions of Induction Heating Bended Austenitic Stainless Steel (316 Series) Piping
유도 가열 굽힘된 316 계열 오스테나이트 스테인리스 강 배관의 잔류응력 분포 고찰
- Kim, Jong Sung (Dept. of Mechanical Engineering, Sunchon Nat'l Univ.) ;
- Kim, Kyoung Soo (KEPCO E&C, Co.) ;
- Oh, Young Jin (KEPCO E&C, Co.) ;
- Chang, Hyun Young (KEPCO E&C, Co.) ;
- Park, Heung Bae (KEPCO E&C, Co.)
- Received : 2014.02.24
- Accepted : 2014.05.09
- Published : 2014.07.01
The induction heating bending process, which has been recently applied to nuclear piping, can generate residual stresses due to thermomechanical mechanism during the process. This residual stress is one of the crack driving forces that have important effects on crack initiation and propagation. However, previous studies have focused only on geometric shape variations such as the change in thickness and ovality. Moreover, very few studies are available on the effects of process variables on residual stresses. This study investigated the effects of process variables on the residual stress distributions of induction heating bended austenitic stainless steel (316 series) piping using parametric finite element analysis. The results indicated that the heat generation rate and feed velocity have significant effects on the residual stresses whereas the moment and bending angle have insignificant effects.
Induction Heating Bending Process;Austenitic Stainless Steel (316) Piping;Residual Stress;Finite Element Analysis
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