Application of digital image correlation for estimation of fatigue crack closure level

A. Eremin, R. Sunder, S. Panin

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

The paper is devoted to the estimation of fatigue crack closure levels under a slow loading-unloading cycle for a precracked single side notched specimen. The crack closure level was determined by DIC technique, when optical images were registered with the help of a high-magnification optical microscope. The shape of hysteresis loops is analyzed to estimate their changing with the distance from the crack tip. Furthermore, the crack closure levels for each "load-displacement" curve were computed by the mean area method. The variation of the crack closure levels with their distance from the specimen edge is discussed. The technique used could be applied for automatic noncontact crack closure measurements under fatigue testing with either constant or variable amplitude.

Original languageEnglish
Title of host publicationMechanics, Resource and Diagnostics of Materials and Structures, MRDMS 2016
Subtitle of host publicationProceedings of the 10th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures
PublisherAmerican Institute of Physics Inc.
Volume1785
ISBN (Electronic)9780735414471
DOIs
Publication statusPublished - 18 Nov 2016
Event10th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures, MRDMS 2016 - Ekaterinburg, Russian Federation
Duration: 16 May 201620 May 2016

Conference

Conference10th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures, MRDMS 2016
CountryRussian Federation
CityEkaterinburg
Period16.5.1620.5.16

ASJC Scopus subject areas

  • Physics and Astronomy(all)

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  • Cite this

    Eremin, A., Sunder, R., & Panin, S. (2016). Application of digital image correlation for estimation of fatigue crack closure level. In Mechanics, Resource and Diagnostics of Materials and Structures, MRDMS 2016: Proceedings of the 10th International Conference on Mechanics, Resource and Diagnostics of Materials and Structures (Vol. 1785). [030008] American Institute of Physics Inc.. https://doi.org/10.1063/1.4967029