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Acoustic Entropy of the Materials in the Course of Degradation

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
Author to whom correspondence should be addressed.
Current address: Department of Engineering, Central Connecticut State University, New Britain, CT 06050, USA
Academic Editor: Kevin H. Knuth
Entropy 2016, 18(8), 280;
Received: 1 July 2016 / Revised: 21 July 2016 / Accepted: 25 July 2016 / Published: 28 July 2016
We report experimental observations on the evolution of acoustic entropy in the course of cyclic loading as degradation occurs due to fatigue. The measured entropy is a result of the materials’ microstructural changes that occur as degradation due to cyclic mechanical loading. Experimental results demonstrate that maximum acoustic entropy emanating from materials during the course of degradation remains similar. Experiments are shown for two different types of materials: Aluminum 6061 (a metallic alloy) and glass/epoxy (a composite laminate). The evolution of the acoustic entropy demonstrates a persistent trend over the course of degradation. View Full-Text
Keywords: degradation; acoustic emission; entropy degradation; acoustic emission; entropy
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Kahirdeh, A.; Khonsari, M.M. Acoustic Entropy of the Materials in the Course of Degradation. Entropy 2016, 18, 280.

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