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

Sensors

Wen Deng¹  Amir Nasrollahi²  Piervincenzo Rizzo²  Kaiyuan Li² 

[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

关键词: highly nonlinear solitary waves;    nondestructive evaluation;    modulus of elasticity;    concrete;    magnetostrictive sensors;   

DOI  :  10.3390/s16010005

来源: mdpi

【 摘 要 】

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.

【 授权许可】

CC BY   
© 2015 by the authors; licensee MDPI, Basel, Switzerland.