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Prediction of Low-Cycle Fatigue Lives of Elbow and Tee Pipes Using Revised Universal Slope Method

[+] Author Affiliations
Hiun Nagamori, Koji Takahashi

Yokohama National University, Hodogaya, Japan

Paper No. PVP2016-63410, pp. V01AT01A031; 6 pages
doi:10.1115/PVP2016-63410
From:
  • ASME 2016 Pressure Vessels and Piping Conference
  • Volume 1A: Codes and Standards
  • Vancouver, British Columbia, Canada, July 17–21, 2016
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-5035-0
  • Copyright © 2016 by ASME

abstract

The stress states of elbow and tee pipes are complex and different from those of straight pipes. Several researchers have reported the low-cycle fatigue lives of elbows and tees under cyclic bending with internal pressure conditions. In this work, finite element analyses were carried out to simulate the reported experimental results of elbows and tees. The crack initiation area and the crack growth direction were successfully predicted by the analyses. The analytical results showed that the revised universal slope method can accurately predict the low-cycle fatigue lives of elbow and tee pipes under internal pressure conditions regardless of differences in shape and dimensions.

Copyright © 2016 by ASME

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