Damage Detection for Curved Surfaces Using Advanced Piezo Impedance Transducers

Ashwini U.  Rankhamb; Suraj N.  Khante

doi:10.4236/ojce.2016.65058

Ashwini U. Rankhamb, Suraj N. Khante^*

Abstract: In recent years, it is necessary to monitor every civil and mechanical structure for the safety of human life and property. By using PZT, monitoring of structures is possible with some limitations such as direct attachment to the host structure, structure subjected to impact from external forces, inaccessible structure, high temperature locations, and structures with complex geometry and curved surfaces. To overcome these limitations, a new technique is employed for structural health monitoring. Using the advanced technique, transducer is prepared by attaching PZT with metal connectors which is in turn attached to the monitored structure. This paper demonstrates experimental study on mild steel pipes. Different aspects of SHM are studied. The proposed technique effectively detects locations of damages and severity of damages of pipe specimen. The technique is also employed to study effect of temperature variation along with detecting progressive damage of pipe specimen when it is subjected to steady constant high temperature. This technique is applicable to high temperature locations as the temperature of PZT maintained below its Curie temperature by introducing metal connector between structure and PZT patch. For the quantification of damages, the RMSD index formula is used.

Keywords: Advanced PZT, Progressive Damage, Metal Connector, Structural Health Monitoring, Curie Temperature

Cite this paper: Rankhamb, A. and Khante, S. (2016) Damage Detection for Curved Surfaces Using Advanced Piezo Impedance Transducers. Open Journal of Civil Engineering, 6, 722-736. doi: 10.4236/ojce.2016.65058.

References

[1] Bhalla, S. and Naskar, S. (2014) Experimental Investigation of Metal Wire Based Variant of EMI Technique for Steel Structures and Systems. Proceedings of 7th ISSS Conference on Smart Materials Structures and Systems, Banalore, 8-11 July 2014, Paper No. 1569922.
http://web.iitd.ac.in/~sbhalla/ISSS649.pdf

[2] Park, G., Cudney, H. and Inman, D.J. (2000) Impedance-Based Health Monitoring of Civil Structural Components. Journal of Infrastructure Systems, ASCE, 6, 153-160.
http://dx.doi.org/10.1061/(ASCE)1076-0342(2000)6:4(153)

[3] Du, G.F., Kong, Q.Z., Lai, T. and Song, G.B. (2013) Feasibility Study On Crack Detection of Pipelines Using Piezoceramic Transducers. International Journal of Distributed Sensor Networks, 9, 1-7.
http://dx.doi.org/10.1155/2013/631715

[4] Na, S. and Lee, H.K. (2012) Resonant Frequency Range Utilized Electro-Mechanical Impedance Method for Damage Detection Performance on Composite Structures. Composite Structure, 94, 2383-2389.
http://dx.doi.org/10.1016/j.compstruct.2012.02.022

[5] Na, S. and Lee, H.K. (2013) Steel Wire Electromechanical Impedance Method Using a Piezoelectric Material for Composite Structures with Complex Surfaces. Composite Structures, 98, 79-84.
http://dx.doi.org/10.1016/j.compstruct.2012.10.046

[6] Bhall, S. (2004) A Mechanical Impedance Approach for Structural Identification, Health Monitoring and Non-Destructive Evaluation Using Piezo-Impedance Transducer. Thesis, Indian Institute of Technology, Delhi.

[7] Farrar, C.R. and Worden, K. (2007) An Introduction to Structural Health Monitoring. Philosophical Transactions of the Royal Society A, 365, 303-315.
http://dx.doi.org/10.1098/rsta.2006.1928

[8] Lalande, F., Childs, B., Choudhary, Z. and Rogers, C.A. (1996) High-Frequency Impedance Analysis for NDE of Complex Precision Parts. Proceedings, SPIE Conference on Smart Structures and Materials, San Diego, 26-29 February, 237-245.