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Proceedings Paper

Life cycle structural health monitoring of airframe structures by strain mapping using FBG sensors
Author(s): I. Takahashi; K. Sekine; H. Takeya; Y. Iwahori; N. Takeda; Y. Koshioka
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Paper Abstract

The purpose of this research is to develop the structural health monitoring system for composite airframe structures by strain mapping through their life cycles. We apply FBG sensor networks to CFRP pressure bulkheads and monitor the strain through their life cycles: molding, processing, assembly, operation and maintenance. Damages, defects and deformations which occurred in each stage are detected using the strain distribution. At first, we monitored the strain of CFRP laminates during molding and processing with FBG sensors. As a result, not only the thermal strain on curing process but also strain change due to demolding was measured precisely. In addition, we analyzed the change in strain distribution due to damages of CFRP pressure bulkhead such as stringer debonding and impact damage of skin under operational load in flight. On the basis of these results, the location of FBG sensors suitable for the detection of damages was determined.

Paper Details

Date Published: 31 March 2010
PDF: 9 pages
Proc. SPIE 7647, Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010, 764723 (31 March 2010); doi: 10.1117/12.847262
Show Author Affiliations
I. Takahashi, Mitsubishi Electric Corp. (Japan)
K. Sekine, Mitsubishi Electric Corp. (Japan)
H. Takeya, Mitsubishi Electric Corp. (Japan)
Y. Iwahori, Japan Aerospace Exploration Agency (Japan)
N. Takeda, The Univ. of Tokyo (Japan)
Y. Koshioka, RIMCOF (Japan)

Published in SPIE Proceedings Vol. 7647:
Sensors and Smart Structures Technologies for Civil, Mechanical, and Aerospace Systems 2010
Masayoshi Tomizuka, Editor(s)

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