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Article: In-situ fabricated smart material active sensors for structural health monitoring

TitleIn-situ fabricated smart material active sensors for structural health monitoring
Authors
KeywordsNde
Piezoelectric Composites
Piezoelectric Wafer Active Sensors
Piezomagnetic Composites
Pwas
Shm
Smart Sensors
Structural Health Monitoring
Issue Date2005
PublisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedings
Citation
Proceedings of SPIE - The International Society for Optical Engineering, 2005, v. 5648, p. 68-78 How to Cite?
AbstractStructural health monitoring (SHM) is currently using piezoelectric wafer active sensors (PWAS) permanently attached to the structure with adhesives. This is often a burdensome and time-consuming task, especially for large structures such as aircraft, bridges, etc. In addition, there are critical applications where the rigid piezoceramic wafers cannot conform to curved surfaces. Another important issue is the long term durability of the bonded interface between the PWAS and the structure, which is often the durability weak link. An in-situ fabricated smart sensor may offer better durability. This paper considers the possibility of fabricating the PWAS directly to the substrate structure in order to alleviate these problems. The paper starts with a review of the state of the art in active composite fabrication. Then, two concepts are considered: the piezomagnetic composite sensor and the piezoelectric composite PWAS. The piezomagnetic composite was fabricated using Terfenol-D magnetostrictive powder in a fiber reinforced composite beam. The strain-induced magnetic field was detected with a Lakeshore gaussmeter. The piezoelectric composite sensor was prepared by mixing lead zirconate titanate (PZT) particles in an epoxy resin. The mixture was applied onto the structural surface using a mask. After curing, the piezo composite was sanded down to the desired thickness and poled under a high electric field. The resulting in-situ composite PWAS was utilized as a sensor for dynamic vibration and impact. Characterization of the in-situ composite PWAS on aluminum structure have been recorded and compared with ceramic PWAS before and after poling. To evaluate the performance of the in-situ composite PWAS, both vibration and impact tests were conducted. Both experiments indicated that in-situ fabrication of active materials composites poses itself as a good candidate for reliable low-cost option for SHM smart sensor fabrication.
Persistent Identifierhttp://hdl.handle.net/10722/91014
ISSN
References

 

DC FieldValueLanguage
dc.contributor.authorGiurgiutiu, Ven_HK
dc.contributor.authorLin, Ben_HK
dc.date.accessioned2010-09-17T10:11:45Z-
dc.date.available2010-09-17T10:11:45Z-
dc.date.issued2005en_HK
dc.identifier.citationProceedings of SPIE - The International Society for Optical Engineering, 2005, v. 5648, p. 68-78en_HK
dc.identifier.issn0277-786Xen_HK
dc.identifier.urihttp://hdl.handle.net/10722/91014-
dc.description.abstractStructural health monitoring (SHM) is currently using piezoelectric wafer active sensors (PWAS) permanently attached to the structure with adhesives. This is often a burdensome and time-consuming task, especially for large structures such as aircraft, bridges, etc. In addition, there are critical applications where the rigid piezoceramic wafers cannot conform to curved surfaces. Another important issue is the long term durability of the bonded interface between the PWAS and the structure, which is often the durability weak link. An in-situ fabricated smart sensor may offer better durability. This paper considers the possibility of fabricating the PWAS directly to the substrate structure in order to alleviate these problems. The paper starts with a review of the state of the art in active composite fabrication. Then, two concepts are considered: the piezomagnetic composite sensor and the piezoelectric composite PWAS. The piezomagnetic composite was fabricated using Terfenol-D magnetostrictive powder in a fiber reinforced composite beam. The strain-induced magnetic field was detected with a Lakeshore gaussmeter. The piezoelectric composite sensor was prepared by mixing lead zirconate titanate (PZT) particles in an epoxy resin. The mixture was applied onto the structural surface using a mask. After curing, the piezo composite was sanded down to the desired thickness and poled under a high electric field. The resulting in-situ composite PWAS was utilized as a sensor for dynamic vibration and impact. Characterization of the in-situ composite PWAS on aluminum structure have been recorded and compared with ceramic PWAS before and after poling. To evaluate the performance of the in-situ composite PWAS, both vibration and impact tests were conducted. Both experiments indicated that in-situ fabrication of active materials composites poses itself as a good candidate for reliable low-cost option for SHM smart sensor fabrication.en_HK
dc.languageengen_HK
dc.publisherS P I E - International Society for Optical Engineering. The Journal's web site is located at http://www.spie.org/app/Publications/index.cfm?fuseaction=proceedingsen_HK
dc.relation.ispartofProceedings of SPIE - The International Society for Optical Engineeringen_HK
dc.subjectNdeen_HK
dc.subjectPiezoelectric Compositesen_HK
dc.subjectPiezoelectric Wafer Active Sensorsen_HK
dc.subjectPiezomagnetic Compositesen_HK
dc.subjectPwasen_HK
dc.subjectShmen_HK
dc.subjectSmart Sensorsen_HK
dc.subjectStructural Health Monitoringen_HK
dc.titleIn-situ fabricated smart material active sensors for structural health monitoringen_HK
dc.typeArticleen_HK
dc.identifier.emailLin, B:blin@hku.hken_HK
dc.description.naturelink_to_subscribed_fulltext-
dc.identifier.doi10.1117/12.582146en_HK
dc.identifier.scopuseid_2-s2.0-18744385498en_HK
dc.relation.referenceshttp://www.scopus.com/mlt/select.url?eid=2-s2.0-18744385498&selection=ref&src=s&origin=recordpageen_HK
dc.identifier.volume5648en_HK
dc.identifier.spage68en_HK
dc.identifier.epage78en_HK

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