Experimental Mechanics

, Volume 27, Issue 4, pp 381–388

Strain-gage methods for measuring the opening-mode stress-intensity factor,KI

  • J. W. Dally
  • R. J. Sanford

DOI: 10.1007/BF02330311

Cite this article as:
Dally, J.W. & Sanford, R.J. Experimental Mechanics (1987) 27: 381. doi:10.1007/BF02330311


Measurements of strain near a crak tip with electrical-resistance strain gages do not usually provide a reliable measure ofKI because of local yielding, three-dimensional effects and limited regions for strain-gage placement. This paper develops expressions for the strains in a valid region removed from the crack tip, and indicates procedures for locating and orienting the gages to accurately determineKI from one or more strain-gage readings.

Copyright information

© Society for Experimental Mechanics, Inc. 1987

Authors and Affiliations

  • J. W. Dally
    • 1
  • R. J. Sanford
    • 1
  1. 1.Department of Mechanical EngineeringUniversity of MarylandCollege Park

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