Application of Digital Image Correlation (DIC) in resonance machines for measuring fatigue crack growth
##plugins.themes.bootstrap3.article.sidebar##
##plugins.themes.bootstrap3.article.main##
Abstract
This paper presents a simple experimental procedure that greatly facilitates the use of digital image
correlation (DIC) techniques in fatigue test conducted in resonant testing machines, without the need of test
interruptions. This is possible due to the implementation of USB interface optical microscopes of very small
dimensions, so that they can be mounted on the specimen as a contact extensometer. Thus, the microscopesample
assembly oscillates at the resonance frequency of the test. This is how, although the resonant testing
machine is in motion, and although the specimen is subjected to fatigue, changing its dimensions according to
the applied load, the acquired image is completely static. This allows the evaluation of the plastic deformations
generated by the crack growth, avoiding the elastic ones. Preliminary results on monitoring cracks with this
technique on flat specimens with cylindrical notches of 1050 aluminium alloy are also presented.
##plugins.themes.bootstrap3.article.details##
How to Cite
Copyright
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.
Open Access Statement
Fracture and Structural Integrity (F&SI) is an open-access journal which means that all content is freely available without charge to the user or his/her institution. Users are allowed to read, download, copy, distribute, print, search, or link to the full texts of the articles in this journal without asking prior permission from the publisher or the author. This is in accordance with the DOAI definition of open access.
F&SI operates under the Creative Commons Licence Attribution 4.0 International (CC-BY 4.0). This allows to copy and redistribute the material in any medium or format, to remix, transform and build upon the material for any purpose, even commercially, but giving appropriate credit, providing a link to the license, and indicating if changes were made.