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A structural health monitoring system for self-repairingFormat | Member Price | Non-Member Price |
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Paper Abstract
Shape memory alloy (SMA) washers expand axially when heated, and the expansion for the one-way type SMA is
permanent even if the heat is removed. We investigated a method to repair bolted joint loosening defects using SMA
washers. We incorporated such a feature into our impedance-based structural health monitoring (SHM) system. An SMA
washer wrapped with a heater is installed between a bolt and the nut. Upon detection of a loosening defect, the heater is
turned on to expand the SMA washer, which in turn repairs the defect. Our experimental results show that (i) our
enhanced SHM system can detect bolted-joint loosening defects, and (ii) it can repair such defects effectively. Our
system suggests that self-repairing of some structural defects is feasible without human interventions.
Paper Details
Date Published: 8 April 2009
PDF: 8 pages
Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 729512 (8 April 2009); doi: 10.1117/12.816398
Published in SPIE Proceedings Vol. 7295:
Health Monitoring of Structural and Biological Systems 2009
Tribikram Kundu, Editor(s)
PDF: 8 pages
Proc. SPIE 7295, Health Monitoring of Structural and Biological Systems 2009, 729512 (8 April 2009); doi: 10.1117/12.816398
Show Author Affiliations
Jeong Ki Kim, Virginia Polytechnic Institute and State Univ. (United States)
Dao Zhou, Virginia Polytechnic Institute and State Univ. (United States)
Dao Zhou, Virginia Polytechnic Institute and State Univ. (United States)
Dong Sam Ha, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Inman, Virginia Polytechnic Institute and State Univ. (United States)
Daniel Inman, Virginia Polytechnic Institute and State Univ. (United States)
Published in SPIE Proceedings Vol. 7295:
Health Monitoring of Structural and Biological Systems 2009
Tribikram Kundu, Editor(s)
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