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http://dx.doi.org/10.3795/KSME-A.2014.38.7.809

Investigation of Residual Stress Distributions of Induction Heating Bended Austenitic Stainless Steel (316 Series) Piping  

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.)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.38, no.7, 2014 , pp. 809-815 More about this Journal
Abstract
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.
Keywords
Induction Heating Bending Process; Austenitic Stainless Steel (316) Piping; Residual Stress; Finite Element Analysis;
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