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Fatigue Growth Behaviour for Surface Crack in Welded Joints Under Combined Tension and Bending Stresses

[+] Author Affiliations
Jian-Ping Zhao, Wen-Long Huang

Nanjing University of Technology, Nanjing, Jiangsu, China

Paper No. PVP2006-ICPVT-11-94051, pp. 607-611; 5 pages
doi:10.1115/PVP2006-ICPVT-11-94051
From:
  • ASME 2006 Pressure Vessels and Piping/ICPVT-11 Conference
  • Volume 3: Design and Analysis
  • Vancouver, BC, Canada, July 23–27, 2006
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 0-7918-4754-3 | eISBN: 0-7918-3782-3
  • Copyright © 2006 by ASME

abstract

The fatigue growth behaviour for surface crack in welded joints under combined tension and bending stresses is studied by fatigue crack growth tests of 16MnR steel in bow specimens. In this present paper the Newman-Raju empirical equation was used for the stress intensity factor of a surface crack. The experimental results show that the Paris’ relationship between crack growth rate and stress intensity factor range under tension and bending fatigue stresses is still valid, and the relationship between the Paris’ coefficients Ca and Cc can be represented as Cc = (0.89)m Ca .

Copyright © 2006 by ASME

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