The sources of heat generation in vibrothermography

Abstract Vibrothermography, or sonic IR, is a nondestructive evaluation technique used to find surface and near surface defects—such as cracks and delaminations—through observations of vibration-induced heat generation. This method has significant interest as an industrial inspection method, however, a lack of understanding of the fundamental physics governing the heat generation process has limited its application despite extensive theoretical, numerical simulation, and experimental work. Significant theoretical and numerical simulation work has been performed, but has yet to be rigorously verified experimentally. This paper presents experimental verification of the sources of heat generation in vibrothermography; specifically friction, plasticity, and viscoelasticity. Specific experimental evidence is presented that verifies each of these heat-generating mechanisms.

[1]  Stephen D. Holland,et al.  Measurement of crack opening stresses and crack closure stress profiles from heat generation in vibrating cracks , 2008 .

[2]  Kenneth Reifsnider,et al.  The Mechanics of Vibrothermography , 1980 .

[3]  Peter Cawley,et al.  Prediction of the thermosonic signal from fatigue cracks in metals using vibration damping measurements , 2007 .

[4]  James R. Lhota,et al.  Experimental considerations in vibrothermography , 2004, SPIE Defense + Commercial Sensing.

[5]  Peter Blau,et al.  Friction science and technology , 1995 .

[6]  Kyle Lick,et al.  Crack growth induced by sonic IR inspection , 2007 .

[7]  Floyd W. Spencer,et al.  Sonic Infrared (IR) Imaging and Fluorescent Penetrant Inspection Probability of Detection (POD) Comparison , 2007 .

[8]  Golam Newaz,et al.  Study of the effect of crack closure in Sonic Infrared Imaging , 2007 .

[9]  A. Bovsunovsky.  The mechanisms of energy dissipation in the non-propagating fatigue cracks in metallic materials , 2004 .

[10]  D. Thompson,et al.  Review of Progress in Quantitative Nondestructive Evaluation , 1982 .

[11]  John C. Duke,et al.  Mechanics of Nondestructive Testing , 1980 .

[12]  K. Kobe.  The friction and lubrication of solids , 1951 .

[13]  Stephen D. Holland,et al.  The Effect of Crack Closure on Heat Generation on Vibrothermography , 2008 .

[14]  S. Holland,et al.  Viscous material-filled synthetic defects for vibrothermography , 2009 .

[15]  Robert E. Shannon,et al.  Study of the Heat Generation Mechanism in Acoustic Thermography , 2006 .

[16]  R. B. Testa,et al.  Closure Effects on Fatigue Crack Detection , 1999 .

[17]  Stephen D. Holland,et al.  Physics-based image enhancement for infrared thermography , 2010 .

[18]  Stephen D. Holland,et al.  Vibration-induced tribological damage to fracture surfaces via vibrothermography , 2011 .