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Proceedings 2018, 2(8), 416; https://doi.org/10.3390/ICEM18-05276

Nondestructive Damage Detection of a Magnetostrictive Composite Structure

1
US Army Research Laboratory, 6340 Rodman Rd., Aberdeen Proving Ground, MD 21005, USA
2
US Naval Surface Warfare Center (NSWC), 9500 MacArthur Blvd, Bethesda, MD 20817, USA
3
Clemson University, 244 Fluor Daniel Building, Clemson, SC 29634, USA
Presented at the 18th International Conference on Experimental Mechanics, Brussels, Belgium, 1–5 July 2018.
*
Author to whom correspondence should be addressed.
Published: 28 May 2018
PDF [558 KB, uploaded 15 June 2018]

Abstract

The integrity of composite structures gradually degrades due to the onset of damage such as matrix cracking, fiber/matrix debonding, and delamination. Over the last two decades, great strides have been made in structural health monitoring (SHM) community using various sensing techniques such as acoustic emission, eddy current, strain gages, etc., to diagnose damage in aerospace, mechanical and civil infrastructures. Embedded sensing offers the prospects of providing for real-time, in-service monitoring of damage were weight savings is a major factor in Aerospace Industry. In this present work, magnetostrictive particles such as Terfenol-D were embedded in a composite structure, along with multiple SHM techniques, to capture the damage in an IM7-carbon fiber reinforced polymer composite system undergoing fatigue loading. As the internal stress state increases, the change in the magnetization flux intensity was captured using a non-contact magnetic field sensor. A damage diagnosis system was established along with an acoustic emissions technique to further validate the damage captured by the embedded system. The goal of this project is to identify the change in the mechanical and magnetic property within a composite material during the evolution of damage. Several characterization techniques were used to determine interfacial fiber-matrix interactions which will provide for a more comprehensive understanding of the composite interfaces.
Keywords: structural health monitoring; magnetostrictive materials; embedded nanocomposites structural health monitoring; magnetostrictive materials; embedded nanocomposites
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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Hall, A.; Coatney, M.; Bradley, N.; Hyeong Yoo, J.; Jones, N.; Williams, B.; Myers, O. Nondestructive Damage Detection of a Magnetostrictive Composite Structure. Proceedings 2018, 2, 416.

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