By a News Reporter-Staff News Editor at Journal of Engineering -- Investigators discuss new findings in Materials Engineering. According to news reporting originating in Ioannina, Greece, by VerticalNews journalists, research stated, "The electrical properties of composite materials have been thoroughly investigated recently for the detection and monitoring of damage in carbon fiber-reinforced polymers (CFRPs) under mechanical loading. Carbon nanotubes are incorporated in the polymer matrix of CFRPs for the enhancement of their electrical properties."
The news reporters obtained a quote from the research from the University of Ioannina, "The electrical properties have shown to be sensitive to the damage state of the material and hence their monitoring provides the profile of their structural deterioration. The aim of the paper is the cross-validation and benchmarking of an electrical potential change monitoring (EPCM) technique against acoustic emission (AE) and lock-in thermography (LT). All techniques successfully identified damage and its propagation. Thermography was more efficient in quantifying damage and describing dynamically the debond topology, as it provided full 2D imaging of the debond in real time. EPCM was successful in providing quantitative information on debond propagation and its directionality. AE provided consistent information on damage propagation. All techniques identified three stages in the fatigue life of the interrogated coupons."
According to the news reporters, the research concluded: "The representation of the fatigue behavior as a function of life fraction, the correlation of AE data with EPCM and LT data, and most importantly the consistent behavior of all tested coupons allowed for both the direct and indirect cross-correlation of all employed methodologies, which consistently identified all aforementioned fatigue life stages."
For more information on this research see: Real-Time Debonding Monitoring of Composite Repaired Materials via Electrical, Acoustic, and Thermographic Methods. Journal of Materials Engineering and Performance, 2014;23(1):169-180. Journal of Materials Engineering and Performance can be contacted at: Springer, 233 Spring St, New York, NY 10013, USA. (Springer - www.springer.com; Journal of Materials Engineering and Performance - www.springerlink.com/content/1059-9495/)
Our news correspondents report that additional information may be obtained by contacting S.A. Grammatikos, University of Ioannina, Dept. of Mat Engn, GR-45110 Ioannina, Greece. Additional authors for this research include E.Z. Kordatos, T.E. Matikas and A.S. Paipetis.
Keywords for this news article include: Greece, Europe, Ioannina, Materials Engineering
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