Smart materials or structures have embedded sensors to monitor their own state as well as environmental stimuli. A novel sensor was developed by sputtering a piezoelectric film onto a conductive fiber or metal wire. This sensor, similar in configuration to an optical fiber, is active since an electric field is developed when strained. Several of these sensors were embedded into a cantilevered beam and a filamentwound cylinder made from AS4/ Epon 828 composites. A variety of test cases were used to demonstrate its sensing feasibility, including free and forced vibrations and acoustic emissions.
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References
1.
CARMAN, G. AND K. REIFSNIDER. 1993. 'Analytical and Optimization of Coating Properties for Actuators and Sensors", Journal of Intelligent Material Systems and Structures4:89-97.
2.
CLAUS, R. O. , B. S. JACKSON AND R. G. MAY. 1985. "Nondestructive Evaluation of Composites by Optical Time Domain Reflectometry in Embedded Optical Fibers", Conference Proceedings IEEE SOUTH-EASTCON'85Raleigh, NC, pp. 241-245.
3.
CLAWLEY, E. H. AND E. F. ANDERSON. 1990. "Detailed Models of Piezoceramic Actuation of Beams", Journal of Intelligent Material Systems and Structures1(1):4-25.
4.
DAVIS, L. E. , N. C. MACDONALD, P. W. PALMBERG, G. E. RIACH AND R. E. WEBER. 1976. Handbook of Auger-Electron-SpecrrlscopyEden Prarie, MN: Physiralltronics Industries, Inc.
5.
FUJIMURA, N. , T. NISHIHARA, S. GouO, J. XU AND T. ITO. 1993. "Control of Preferred Orientation for ZnO, Films: Control of Self-Texture", Journal of Crystal Growth130:269-279.
6.
GALEA, S. C. , W. K. CHIU AND J. J. PAUL. 1993. "Use of Piezoelectric Films in Detecting and Monitoring Damage in Composites", Journal of Intelligent Material Systems and Structures, 4:330-336.
7.
GHOSH, S. , A. SARKAR, S. BHATTACHARYA, S. CHAUDHURI AND A. K. PAL. 1991. "Microstructure of ZnO Films Produced by Reactive DC Sputtering Technique", Journal of Crystal Growth108:534-540.
8.
HA, S-K. , C. KEILERS AND F-K. CHANG. 1991. "Analysis of Laminated Composites Containing Distributed Piezoelectric Ceramics", Journal of Intelligent Material Systems and Structures, 2:59-71.
HOROWITZ, P. AND W. HILL. 1980. Feedback and Operational AmplifiersCambridge University Press, Cambridge.
11.
KONISH, R. , K. NODA, H. HARADA AND H. SASAKURA. 1992. "The Preparation of Transparent ZnO:Al Thin Films", Journal of Crystal Growth117:939-942.
12.
KRISHNASWANY, S. V. , B. R. McAvoy, W. J. TAKEI AND R. A. MOORE. 1982. "Oriented ZnO Films for Microwave Shear Mowed Transducers", Proceedings of the IEEE 1982 Ultrasonics Symposium pp. 476-479.
13.
MATSUOKA, M. AND K. ONO. 1989. "Crystal Structures and Optical Properties of ZnO Films Prepared by Sputtering-Type Electron Cyclotron Resonance Microwave Plasma", Journal of Vacuum Science and Technol- ogy, A7(5):2975-2981.
14.
NAKADA, T. , Y. OHKUBO AND A. KUNIOKA. 1991. "Effect of Water Vapor on the Growth of Textured Zno-Based Films for Solar Cells by DC-Magnetron Sputtering", Japanese Journal of Applied Physics30(12A): 3344-3348.
15.
NEWNHAM, R. E. AND G. R. RUSCHAU. 1993. "Electromechanical Properties of Smart Materials", 4:289-294.
16.
READ, B. E. AND G. D. DEAN. 1978. The Determination of Dynamic Properties of Polymers and Composites. Bristol: Adam Hilger Ltd.
17.
ROGER, C. A. 1990. 'An Introduction to Intelligent Material Systems and Structures', Proc. of the International Workshop on Intelligent StructuresTaiwan, pp. 3-41.
18.
SHAIHK, N. , S. J. CHEN, Y. Lu AND D. C. TIMM.1992. "Smart Structural Composites with the Ability to Monitor Vibration and Damage"', Ist European Conference on Smart Structures and MaterialsGlasgow, Scotland, pp. 123-126.
19.
SHAIKH, N. AND R. DILLON. 1990. "Smart Structural Composites", Proc. of US./Japan Workshop on Smart/Intelligent Materials and Systems pp. 287-293.
20.
SIRKIS, J. S. AND A. DASGUPTA. 1993."The Role of Local Interaction Mechanics in Fiber Optic Smart Structures", Journal of Intelligent Material Systems and Structures4:260-271.
21.
TIMM, D. C. , W. M. TIAN, B. J. LARSON AND R. R. SUDDUTH. 1984. "Thermoset Resin Microstructure by Gel-Permeation Chromatography: An Anhydride Cured Epoxy", Journal of Chromatography316:343-358.
22.
WADA, B. K. , J. L. FANSON AND E. F. CLAWLEY. 1990. "Adaptive Structures", Journal of Intelligent Material Systems and Structures1:157-174.
