• Title/Summary/Keyword: Nuclear Component

Search Result 697, Processing Time 0.027 seconds

Residual Stress Redistribution on Welds of Nuclear Component by Mechanical Stress Relieving Methods (기계적 응력이완 방법에 의한 원전기기 용접부의 잔류응력 재분포)

  • 이세환;김종성;진태은
    • Journal of Welding and Joining
    • /
    • v.22 no.2
    • /
    • pp.51-58
    • /
    • 2004

  • Residual stresses, which can be produced during the welding process, play an important role in an industrial field. Welding residual stresses are exerting negative effect on the fatigue behavior and integrity of structure. In this study, as a result of the thermal elasto-plastic finite element analysis for the welds of a nuclear component, the residual stress distributions are estimated for as-welded condition. Also, finite element techniques are developed to simulate the relaxation of the residual stresses according to the various mechanical stress relieving(MSR) loads such as hydrostatic pressure loading, tensile pipe-end loading, and mechanical stress improvement process(MSIP) loading. Finally, the results of residual stress redistributions for various loading conditions are compared and reviewed qualitatively and quantitatively to find an optimum loading condition.

  • PDF KSCI