Title
A digital image correlation method for fatigue test experiments A digital image correlation method for fatigue test experiments
Author
Faculty/Department
Faculty of Applied Engineering Sciences
Publication type
article
Publication
Barking ,
Subject
Engineering sciences. Technology
Source (journal)
Optics and lasers in engineering. - Barking
Volume/pages
47(2009) :3-4 , p. 371-378
ISSN
0143-8166
ISI
000264096500012
Carrier
E
Target language
English (eng)
Full text (Publishers DOI)
Abstract
In this paper, a method based on the digital image correlation (DIC) technique is proposed to monitor the crack growth process during a cyclic fatigue test. Stroboscopic illumination is used to acquire DIC speckle pattern images while the test sample is dynamically loaded. The proposed DIC algorithm uses the fact that the load is periodic to increase the accuracy of the displacement field estimates (a sinusoidal fitting method is introduced for this purpose). Using the appropriate post-processing both the crack lengths and the stress intensity factors can be estimated in function of the number of fatigue cycles. A validation test case on an aluminum U-profile will be presented in the paper. (C) 2008 Elsevier Ltd. All rights reserved.
E-info
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