Experimental Mechanics

, Volume 31, Issue 1, pp 42–46 | Cite as

Crack-growth-rate estimation on a three-point bend specimen during low-cycle fatigue

  • Johan Tryding


The ratio of the change of the clip-gage measured crack-opening displacement of a three-point bend specimen to the change of the displacement at the point of application of the cyclic load is shown to vary linearly with the ratio of the crack length to the specimen height. With the aid of this relation, the crack-growth rate is obtained by numerical differentiation of the crack length with respect to the number of load cycles. A clip-gage correction factor is introduced in order to compensate for the use of external edges to position the clip-gage during the experiment.


Fatigue Mechanical Engineer Fluid Dynamics Correction Factor Crack Length 
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Copyright information

© Society for Experimental Mechanics, Inc. 1991

Authors and Affiliations

  • Johan Tryding
    • 1
  1. 1.Division of Solid MechanicsLund Institute of TechnologyLundSweden

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