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contributor authorCho, Nak-Kyun
contributor authorChoi, Youngjae
contributor authorChen, Haofeng
date accessioned2022-05-08T08:35:12Z
date available2022-05-08T08:35:12Z
date copyright11/8/2021 12:00:00 AM
date issued2021
identifier issn0094-9930
identifier otherpvt_144_01_011507.pdf
identifier urihttp://yetl.yabesh.ir/yetl1/handle/yetl/4284113
description abstractSupercritical boiler system has been widely used to increase efficiency of electricity generation in power plant industries. However, the supercritical operating condition can seriously affect structural integrity of power plant components due to high temperature that causes degradation of material properties. Pressure reducing valve is an important component being employed within a main steam line of the supercritical boiler, which occasionally thermal-fatigue failure being reported. This research has investigated creep-cyclic plastic behavior of the pressure reducing valve under combined thermomechanical loading using a direct numerical method known as extended direct steady cycle analysis of the linear matching method framework (LMM eDSCA). Finite element model of the pressure-reducing valve is created based on a practical valve dimension and temperature-dependent material properties are applied for the numerical analysis. The simulation results demonstrate a critical loading component that attributes creep-fatigue failure of the valve. Parametric studies confirm the effects of magnitude of the critical loading component on creep deformation and total deformation per loading cycle. With these comprehensive numerical results, this research provides engineer with an insight into possible failure mechanisms of the pressure-reducing valve at high temperature.
publisherThe American Society of Mechanical Engineers (ASME)
titleCreep–Fatigue Interaction Effects on Pressure-Reducing Valve Under Cyclic Thermomechanical Loadings Using Direct Cyclic Method
typeJournal Paper
journal volume144
journal issue1
journal titleJournal of Pressure Vessel Technology
identifier doi10.1115/1.4052658
journal fristpage11507-1
journal lastpage11507-8
page8
treeJournal of Pressure Vessel Technology:;2021:;volume( 144 ):;issue: 001
contenttypeFulltext


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