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Sensors 2016, 16(2), 260; doi:10.3390/s16020260

Characterization of Degradation Progressive in Composite Laminates Subjected to Thermal Fatigue and Moisture Diffusion by Lamb Waves

1
School of Aerospace Engineering, Xiamen University, Xiamen 361005, China
2
School of Mechanical Engineering, Beijing Institute of Technology, Beijing 100041, China
3
School of Mechanical Engineering, Pusan National University, Busan 609-735, Korea
*
Authors to whom correspondence should be addressed.
Academic Editor: Jandro L. Abot
Received: 29 November 2015 / Revised: 15 February 2016 / Accepted: 16 February 2016 / Published: 19 February 2016
(This article belongs to the Special Issue Integrated Structural Health Monitoring in Polymeric Composites)
View Full-Text   |   Download PDF [3252 KB, uploaded 19 February 2016]   |  

Abstract

Laminate composites which are widely used in the aeronautical industry, are usually subjected to frequency variation of environmental temperature and excessive humidity in the in-service environment. The thermal fatigue and moisture absorption in composites may induce material degradation. There is a demand to investigate the coupling damages mechanism and characterize the degradation evolution of composite laminates for the particular application. In this paper, the degradation evolution in unidirectional carbon/epoxy composite laminates subjected to thermal fatigue and moisture absorption is characterized by Lamb waves. The decrease rate of Lamb wave velocity is used to track the degradation evolution in the specimens. The results show that there are two stages for the progressive degradation of composites under the coupling effect of thermal cyclic loading and moisture diffusion. The present work provides an alternative to monitoring the degradation evolution of in-service aircraft composite Laminates. View Full-Text
Keywords: composite laminates; degradation progressive; thermal fatigue; moisture diffusion; Lamb waves composite laminates; degradation progressive; thermal fatigue; moisture diffusion; Lamb waves
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).

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Li, W.; Xu, C.; Cho, Y. Characterization of Degradation Progressive in Composite Laminates Subjected to Thermal Fatigue and Moisture Diffusion by Lamb Waves. Sensors 2016, 16, 260.

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