Study on the effect of welding residual stress on creep-cyclic plasticity behaviour

Creep-cyclic plasticity and creep-fatigue damage interaction of a welded flange are studied considering both the thermo-mechanical load welding residual stress (WRS). The presence WRS was found to have minimal effect on shakedown ratcheting curves, though distribution changes considerably in WRS. is predominant for initial cycles after which it relaxes so that at steady state creep-cyclic response similar with without Depending magnitude sign different locations within weldment, has detrimental beneficial life. Investigations carried out using Linear Matching Method (LMM), further modified assess transient Results show aweldment induces tensile compressive stress/strain it's vicinity, substantially influences creep fatigue damage. complicates this. For all combinations calculations undertaken, consideration or mean strain, order elements maximum differed.