8. Conclusions

In this study, a flexible strain sensor was fabricated using the electroplating process. The coating was carried out on nylon yarn, and it appeared thin and uniform. Then, the strain sensor was characterized and tested experimentally, and its behavior verified numerically. The results were very encouraging and reproducible. Next, the yarn sensor was incorporated into a composite material and standardized specimens were prepared and tested. The signal from the sensor was correlated perfectly with the local stress-signal of the composite panel. The following conclusions are drawn from this study:

• It confirmed the feasibility of fabricating a flexible strain sensor. The sensor was made of nylon yarn, coated with silver. The resistivity change was recorded in the elastic-plastic region, which showed that these flexible strain sensor wires can be used for SHM in different structures and can sense deformation or damage prior to failure.

Author details

Yumna Qureshi<sup>1</sup>

109

, Mostapha Tarfaoui1,2\*, Khalil K. Lafdi3 and Khalid Lafdi<sup>2</sup>

1 ENSTA Bretagne, IRDL-FRE CNRS 3744, Brest, France

Nanotechnology and Development of Strain Sensor for Damage Detection

DOI: http://dx.doi.org/10.5772/intechopen.82871

3 Ohio Connections Academy, Mason, Ohio, United States

\*Address all correspondence to: mostapha.tarfaoui@ensta-bretagne.fr

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium,

2 University of Dayton, Dayton, OH, United States

provided the original work is properly cited.


Nanotechnology and Development of Strain Sensor for Damage Detection DOI: http://dx.doi.org/10.5772/intechopen.82871
