Towards real time crack monitoring using image correlation

P. López-Crespo*, A. Shterenlikht, E. A. Patterson, J. R. Yates, P. J. Withers, R. Burguete

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

6 Citations (Scopus)

Abstract

In this work low frequency cyclic loading was applied to a fatigue pre-cracked wedge opening loaded (WOL) sample. The resulting in-plane displacement fields were measured using a 2D image correlation method. Muskhelishvili's complex function approach was used to represent the displacements and thereby obtain the stress intensity factors (SIFs) directly without differentiation to give strain. The SIFs were monitored throughout 3 loading cycles. Overall the inferred SIFs agree well with the nominal applied values. The biggest difference of approximately 10% was observed when the nominal SIFs were close to the fracture toughness. Thus the difference may arise from the effects of the crack tip plasticity. We hope to extended this technique to real time fatigue crack monitoring in the future.

Original languageEnglish
Title of host publicationProceedings of the 2006 SEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Pages2006-2013
Number of pages8
Volume4
Publication statusPublished - 31 Oct 2006
EventSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006 - Saint Louis, MO, United States
Duration: 4 Jun 20067 Jun 2006

Conference

ConferenceSEM Annual Conference and Exposition on Experimental and Applied Mechanics 2006
Country/TerritoryUnited States
CitySaint Louis, MO
Period4/06/067/06/06

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