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Assessment of Residual Stress in Fracture Mechanics Coupons

[+] Author Affiliations
Michael R. Hill

University of California, Davis, CA

John E. VanDalen

Hill Engineering, LLC, Rancho Cordova, CA

Michael B. Prime

Los Alamos National Laboratory, Los Alamos, NM

Paper No. PVP2011-57768, pp. 421-426; 6 pages
doi:10.1115/PVP2011-57768
From:
  • ASME 2011 Pressure Vessels and Piping Conference
  • Volume 6: Materials and Fabrication, Parts A and B
  • Baltimore, Maryland, USA, July 17–21, 2011
  • Conference Sponsors: Pressure Vessels and Piping Division
  • ISBN: 978-0-7918-4456-4
  • Copyright © 2011 by ASME

abstract

This paper describes measurements of residual stress in coupons used for fracture mechanics testing. The primary objective of measurement is to quantify the distribution of residual stress acting to open (and/or close) the crack across the crack plane. The slitting method and the contour method are two destructive residual stress measurement methods particularly capable of addressing that objective, and these were applied to measure residual stress in a set of identically prepared compact tension (C(T)) coupons. Comparison of the results of the two measurement methods provides some useful observations. Results from fracture mechanics tests of residual stress bearing coupons and fracture analysis, based on linear superposition of applied and residual stresses, show consistent behavior of coupons having various levels of residual stress.

Copyright © 2011 by ASME

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