Calculated Shoulder to Gauge Ratio of Fatigue Specimens in PWR Environment

Research output: Contribution to journalArticle

Authors

  • Igor Simonovski
  • Alec Mclennan
  • Kevin Mottershead
  • Peter Gill
  • Norman Platts
  • Matthias Bruchhausen
  • Joshua L. Waters
  • Marc Vankeerberghen
  • Germán Barrera Moreno
  • Sergio Arrieta Gomez
  • Radek Novotny

Institutes & Expert groups

  • EC - JRC - European Commission - Joint Research Centre
  • High Temperature Facility Alliance
  • CIEMAT - Centro de Investigaciones Energéticas, Medioambientales y Tecnológicas
  • University of Cantabria

Documents & links

DOI

Abstract

A ratio of shoulder to gauge displacements (S2G) is calculated for three different fatigue specimens in a pressurized water environment. This ratio needs to be known beforehand to determine the applied shoulder displacements during the experiment that would result in the desired strain amplitude in the gauge section. Significant impact of both the applied constitutive law and specimen geometry on the S2G is observed. The calculation using the fully elastic constitutive law results in the highest S2G values and compares very well with the analytical values. However, this approach disregards the plastic deformation within the specimens that mostly develops in the gauge section. Using the constitutive laws derived from actual fatigue curves captures the material behaviour under cyclic loading better and results in lower S2G values compared to the ones obtained with the fully elastic constitutive law. Calculating S2G values using elastic–plastic constitutive law based on the monotonic uniaxial tensile test should be avoided as they are significantly lower compared to the ones computed with elastic–plastic laws derived from hysteresis loops at half-life.

Details

Original languageEnglish
Article number1103376
Pages (from-to)1-13
Number of pages13
JournalMetals
Volume11
Issue number3
DOIs
Publication statusPublished - 24 Feb 2021

Keywords

  • Environmental fatigue, 304 stainless steel, Air, PWR primary water, 300°C

ID: 7047574