4-7September 2017

For dissemination of Intel-line, Brunel Innovation Centre participated at the 2nd International Conference on Structural Integrity, in Funchal, Madeira, Portugal at 4 - 7 September, 2017. The details of the conference and the abstract of the presentation are given below;

#133 Study of the Effects of Different Load Tension Levels on Guided Waves Testing applied to Power Line Cables

Sergio Malo1 , Makis Livadas1 , Jamil Kanfoud1 , Tat-Hean Gan1 , Cristinel Mares2

1Brunel Innovation Centre, Brunel University London, Uxbridge, Middlesex, UB8 3PH, United Kingdom Tat-Hean.Gan@brunel.ac.uk, sergio.malo@brunel.ac.uk

2Dept. Mechanical, Aerospace and Civil Engineering, Brunel University London Uxbridge, Middlesex, UB8 3PH, United Kingdom.

Abstract Multi-wire cables are employed in a wide range of applications, among these, power line cables is one of the most extended. Thousands of kilometers of cables are installed in many different locations, including adverse environments such as polluted and salty atmospheres. These factors, together with the age of some of the installations, could lead to the failure of the structure. Among the different structural health monitoring solutions, Ultrasonic guided wave technique has been studied as a potential solution for testing these structures. This research focuses on the study of how the different load tension levels affect the propagation of the guided waves, as well as the capabilities of the technique for the detection of cross-section area distortions. In order to evaluate the applicability of the technique, a scenario close to a real installation setup was developed with lengthy cables. The tests were done at a wide range of frequencies including very low frequencies not normally employed for UGW testing. The results indicate the high influence of the load tension level in the propagation of the guided waves at different frequencies, showing great potential regarding low attenuation behavior at very low frequencies. These results also showed the capabilities of the technique to detect cross-section area distortions located from a long range.