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Sensors 2016, 16(1), 5; doi:10.3390/s16010005

On the Reliability of a Solitary Wave Based Transducer to Determine the Characteristics of Some Materials

1
School of Automation, Northwestern Polytechnical University, Xi’an 710072, China
2
Laboratory for Nondestructive Evaluation and Structural Health Monitoring Studies, Department of Civil and Environmental Engineering, University of Pittsburgh, 3700 O’Hara Street, 729 Benedum Hall, Pittsburgh, PA 15261, USA
These authors contributed equally to this work.
*
Author to whom correspondence should be addressed.
Academic Editor: Vittorio M. N. Passaro
Received: 19 November 2015 / Revised: 18 December 2015 / Accepted: 18 December 2015 / Published: 23 December 2015
(This article belongs to the Section Physical Sensors)
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Abstract

In the study presented in this article we investigated the feasibility and the reliability of a transducer design for the nondestructive evaluation (NDE) of the stiffness of structural materials. The NDE method is based on the propagation of highly nonlinear solitary waves (HNSWs) along a one-dimensional chain of spherical particles that is in contact with the material to be assessed. The chain is part of a built-in system designed and assembled to excite and detect HNSWs, and to exploit the dynamic interaction between the particles and the material to be inspected. This interaction influences the time-of-flight and the amplitude of the solitary pulses reflected at the transducer/material interface. The results of this study show that certain features of the waves are dependent on the modulus of elasticity of the material and that the built-in system is reliable. In the future the proposed NDE method may provide a cost-effective tool for the rapid assessment of materials’ modulus. View Full-Text
Keywords: highly nonlinear solitary waves; nondestructive evaluation; modulus of elasticity; concrete; magnetostrictive sensors highly nonlinear solitary waves; nondestructive evaluation; modulus of elasticity; concrete; magnetostrictive sensors
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Deng, W.; Nasrollahi, A.; Rizzo, P.; Li, K. On the Reliability of a Solitary Wave Based Transducer to Determine the Characteristics of Some Materials. Sensors 2016, 16, 5.

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