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Comparison of Strain Rate Calculation Methods for Environmental Fatigue Correction Evaluation

[+] Author Affiliations
Seiji Asada

Mitsubishi Heavy Industries, Ltd., Kobe, Japan

Paper No. PVP2012-78020, pp. 141-146; 6 pages
doi:10.1115/PVP2012-78020
From:
  • ASME 2012 Pressure Vessels and Piping Conference
  • Volume 1: Codes and Standards
  • Toronto, Ontario, Canada, July 15–19, 2012
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5500-3
  • Copyright © 2012 by ASME

abstract

A Code Case for procedure to determine strain rate and Fen for environmental fatigue evaluation is under preparation in the ASME BPV Committee on Construction of Nuclear Facility Components (III). The draft Code Case is to incorporate two methods for strain rate calculation. One is based on NB-3216.1 “Constant Principal Stress Direction” that comes from the JSME Environmental Fatigue Evaluation Method. The other is based on NB-3216.2 “Varying Principal Stress Direction” that was proposed by M. Gray et al. In this paper, both methods are explained and compared by using a sample problem.

Copyright © 2012 by ASME

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