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Article
The Effect of Crack Closure on Heat Generation on Vibrothermography
Aerospace Engineering Conference Papers, Presentations and Posters
  • Jeremy Blake Renshaw, Iowa State University
  • Stephen D. Holland, Iowa State University
  • R. Bruce Thompson, Iowa State University
  • Christopher Uhl, Iowa State University
Document Type
Conference Proceeding
Conference
Review of Progress in Quantitative Nondestructive Evaluation
Publication Date
7-1-2008
Geolocation
(41.8781136, -87.6297982)
Abstract
Vibrothermography is a nondestructive evaluation (NDE) technique that has shown great promise in detecting tight cracks that can often be missed using other NDE methods. Vibration applied to a structure containing cracks forces crack faces to rub together and generates frictional heat imaged with an infrared camera. The closure state of a crack controls the locations and magnitude of heat generation in a vibrated crack. Noncontacting regions of cracks and regions under large closure stresses generally do not rub together to generate heat. Heat is generated at contacting regions of crack faces under low closure stresses. Regions along a crack that generate heat can be modulated based on externally applied stresses. The closure state of a crack, the level of applied vibration, and externally applied stresses influence the regions of a crack that will generate heat and those that will not. Due to the nature of the heat generation process, some cracks that are not detectable using other NDE methods are readily detectable using Vibrothermography.
Comments

Copyright 2009 American Institute of Physics. This article may be downloaded for personal use only. Any other use requires prior permission of the author and the American Institute of Physics.

This article appeared in AIP Conference Proceedings, 1096 (2009): 473–480 and may be found at http://dx.doi.org/10.1063/1.3114289.

Copyright Owner
American Institute of Physics
Language
en
Citation Information
Jeremy Blake Renshaw, Stephen D. Holland, R. Bruce Thompson and Christopher Uhl. "The Effect of Crack Closure on Heat Generation on Vibrothermography" Chicago, IL(2008)
Available at: http://works.bepress.com/rbruce_thompson/23/