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Proceedings Paper

Design of a robust SHM system for composite structures
Author(s): Shawn Beard; Ching-Chao Liu; Fu-Kuo Chang
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Paper Abstract

Composites are becoming increasingly popular materials used in a wide range of applications on large-scale structures such as windmill blades, rocket motor cases, and aircraft fuselage and wings. For these large structures, using composites greatly enhances the operation and performance of the application, but also introduces extraordinary inspection challenges that push the limits of traditional NDE in terms of time and cost. Recent advances in Structural Health Monitoring (SHM) technologies offer a promising solution to these inspection challenges. But efficient design methodologies and implementation procedures are needed to ensure the reliability and robustness of SHM technologies for use in real-world applications. This paper introduces the essential elements of the design and implementation process by way of example. State-of-the-art techniques to optimize sensor placement, perform self-diagnostics, compensate for environmental conditions, and generate probability of detection (POD) curves for any application are discussed. The techniques are presented in relation to Acellent's recently developed SmartComposite System that is used to monitor the integrity of large composite structures. The system builds on the active sensor network technology of Acellent that is analogous to a built-in acousto-ultrasonic NDE system. Key features of the system include new miniaturized lightweight hardware, self-diagnostics and adaptive algorithm to automatically compensate for damaged sensors, reliable damage detection under different environmental conditions, and generation of POD curves. This paper will provide an overview of the system and demonstrate its key features.

Paper Details

Date Published: 11 April 2007
PDF: 9 pages
Proc. SPIE 6527, Industrial and Commercial Applications of Smart Structures Technologies 2007, 652709 (11 April 2007); doi: 10.1117/12.717319
Show Author Affiliations
Shawn Beard, Acellent Technologies, Inc. (United States)
Ching-Chao Liu, Acellent Technologies, Inc. (United States)
Fu-Kuo Chang, Stanford Univ. (United States)

Published in SPIE Proceedings Vol. 6527:
Industrial and Commercial Applications of Smart Structures Technologies 2007
L. Porter Davis; B. K. Henderson; M. Brett McMickell, Editor(s)

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