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Structural Health Monitoring with Fiber Bragg Grating and Piezo Arrays
NTRS Full-Text: Click to View  [PDF Size: 213 KB]
External Online Source: http://www.techbriefs.com/component/content/article/14858
Author and Affiliation:
Black, Richard J.(Intelligent Fiber-Optic Systems, Corp., Santa Clara, CA, United States);
Faridian, Ferey(Intelligent Fiber-Optic Systems, Corp., Santa Clara, CA, United States);
Moslehi, Behzad(Intelligent Fiber-Optic Systems, Corp., Santa Clara, CA, United States);
Sotoudeh, Vahid(Intelligent Fiber-Optic Systems, Corp., Santa Clara, CA, United States)
Abstract: Structural health monitoring (SHM) is one of the most important tools available for the maintenance, safety, and integrity of aerospace structural systems. Lightweight, electromagnetic-interference- immune, fiber-optic sensor-based SHM will play an increasing role in more secure air transportation systems. Manufacturers and maintenance personnel have pressing needs for significantly improving safety and reliability while providing for lower inspection and maintenance costs. Undetected or untreated damage may grow and lead to catastrophic structural failure. Damage can originate from the strain/stress history of the material, imperfections of domain boundaries in metals, delamination in multi-layer materials, or the impact of machine tools in the manufacturing process. Damage can likewise develop during service life from wear and tear, or under extraordinary circumstances such as with unusual forces, temperature cycling, or impact of flying objects. Monitoring and early detection are key to preventing a catastrophic failure of structures, especially when these are expected to perform near their limit conditions.
Publication Date: Oct 01, 2012
Document ID:
20120016276
(Acquired Nov 29, 2012)
Subject Category: MAN/SYSTEM TECHNOLOGY AND LIFE SUPPORT
Report/Patent Number: DRC-010-015
Document Type: NASA Tech Brief
Publication Information: NASA Tech Briefs, October 2012; 26-27; (SEE 20120016252)
Financial Sponsor: NASA Dryden Flight Research Center; Edwards, CA, United States
Organization Source: Intelligent Fiber-Optic Systems, Corp.; Santa Clara, CA, United States
Description: 2p; In English; Original contains color illustrations
Distribution Limits: Unclassified; Publicly available; Unlimited
Rights: Copyright; Distribution as joint owner in the copyright
NASA Terms: AEROSPACE SYSTEMS; BRAGG GRATINGS; DETECTION; ELECTROMAGNETIC INTERFERENCE; FIBER OPTICS; MAINTENANCE; RELIABILITY; SAFETY; SERVICE LIFE; STRUCTURAL FAILURE
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