Stress intensity factor calculation in sharp and beveled edge nozzle corners

This paper presents the work performed for the development of Stress Intensity Factor compendia for defects in nozzle corners. For that purpose, a large set Finite Element modeling were performed in order to cover the geometries, the defect sizes, the loading situations … encountered by large nuclea...

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Bibliographic Details
Published in:The International journal of pressure vessels and piping 2016-05, Vol.141, p.11-18
Main Author: Chapuliot, S.
Format: Article
Language:English
Subjects:
Approximation
Corners
Defects
Finite element method
Fracture mechanics assessment
Mathematical models
Nozzles
Pressure
Pressure vessels
Stress intensity factor
Thermal shock
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Summary:This paper presents the work performed for the development of Stress Intensity Factor compendia for defects in nozzle corners. For that purpose, a large set Finite Element modeling were performed in order to cover the geometries, the defect sizes, the loading situations … encountered by large nuclear components. Then, based on that set of Finite Element modeling, an approximate solution relying on a fit of the stress field along the bisector line of the nozzle corner is proposed. This solution allows determining accurately the mean and maximum Stress Intensity Factor along the crack front for pressure loading and at the maximum of cold thermal shock loading. It is validated through a comparison to existing solutions or Finite Element modeling results. •Fracture Mechanics Assessment of large nozzle corners.•Stress Intensity Factor determination under Internal pressure and thermal shock loading.•Compendia including sharp angle and beveled edge configurations.
ISSN:0308-0161
1879-3541
DOI:10.1016/j.ijpvp.2016.03.015