Next Article in Journal
Acoustic Detection of Coronary Occlusions before and after Stent Placement Using an Electronic Stethoscope
Previous Article in Journal
Entropy Generation through Non-Equilibrium Ordered Structures in Corner Flows with Sidewall Mass Injection
Article Menu

Export Article

Open AccessArticle
Entropy 2016, 18(8), 280; doi:10.3390/e18080280

Acoustic Entropy of the Materials in the Course of Degradation

Department of Mechanical Engineering, Louisiana State University, Baton Rouge, LA 70803, USA
Current address: Department of Engineering, Central Connecticut State University, New Britain, CT 06050, USA
*
Author to whom correspondence should be addressed.
Academic Editor: Kevin H. Knuth
Received: 1 July 2016 / Revised: 21 July 2016 / Accepted: 25 July 2016 / Published: 28 July 2016
View Full-Text   |   Download PDF [3240 KB, uploaded 28 July 2016]   |  

Abstract

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
Figures

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

Scifeed alert for new publications

Never miss any articles matching your research from any publisher
  • Get alerts for new papers matching your research
  • Find out the new papers from selected authors
  • Updated daily for 49'000+ journals and 6000+ publishers
  • Define your Scifeed now

SciFeed Share & Cite This Article

MDPI and ACS Style

Kahirdeh, A.; Khonsari, M.M. Acoustic Entropy of the Materials in the Course of Degradation. Entropy 2016, 18, 280.

Show more citation formats Show less citations formats

Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Related Articles

Article Metrics

Article Access Statistics

1

Comments

[Return to top]
Entropy EISSN 1099-4300 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top