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Sensors 2016, 16(4), 427; doi:10.3390/s16040427

Effect of Voltage Measurement on the Quantitative Identification of Transverse Cracks by Electrical Measurements

COHMAS Laboratory, Physical Science and Engineering Division, King Abdullah University of Science and Technology (KAUST), Thuwal 23955-6900, Saudi Arabia
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Academic Editor: Jandro L. Abot
Received: 16 January 2016 / Revised: 16 March 2016 / Accepted: 18 March 2016 / Published: 24 March 2016
(This article belongs to the Special Issue Integrated Structural Health Monitoring in Polymeric Composites)
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Abstract

Electrical tomography can be used as a structural health monitoring technique to identify different damage mechanisms in composite laminates. Previous work has established the link between transverse cracking density and mesoscale conductivity of the ply. Through the mesoscale relationship, the conductivity obtained from electrical tomography can be used as a measure of the transverse cracking density. Interpretation of this measure will be accurate provided the assumptions made during homogenization are valid. One main assumption of mesoscale homogenization is that the electric field is in the plane. Here, we test the validity of this assumption for laminates with varying anisotropy ratios and for different distances between the cracked ply and surface that is instrumented with electrodes. We also show the equivalence in electrical response between measurements from cracked laminates and their equivalent mesoscale counterparts. Finally, we propose some general guidelines on the measurement strategy for maximizing the accuracy of transverse cracks identification. View Full-Text
Keywords: transverse cracking; electrical tomography; sensitivity; laminated composites transverse cracking; electrical tomography; sensitivity; laminated composites
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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Selvakumaran, L.; Lubineau, G. Effect of Voltage Measurement on the Quantitative Identification of Transverse Cracks by Electrical Measurements. Sensors 2016, 16, 427.

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