Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
Electromechanical Impedance Method Applied in a Silicone Rubber Model
Submission Author:
Gabriela Lima Menegaz , MG
Co-Authors:
Karina Mayumi Tsuruta, Gilmar Guimaraes, Roberto Mendes Finzi Neto, Valder Steffen Jr, CLEUDMAR ARAÚJO, Gabriela Lima Menegaz
Presenter: Gabriela Lima Menegaz
doi://10.26678/ABCM.COBEM2017.COB17-1710
Abstract
Structural systems are inevitably subject to environmental factors and loads that can cause damage, which in turn can compromise safety and operational efficiency. Structural integrity monitoring (SHM) techniques have been of particular interest in increasing the reliability of highly responsible structural systems, while reducing maintenance costs. Most structural engineering systems are composed of mainly ferrous metals and aluminum alloys whose failure modes are reasonably well characterized. The experimental procedure uses a piezoelectric transducer as sensor and actuator, PZT, attached to the surface of the monitored structure. Due to the electromechanical coupling between the sensors and the structure, the presence of the damage in the structure changes the impedance signal. Damage metrics are then used to identify and quantify the damages. In the present work, SHM technique was applied in a silicone rubber model to detect the presence of inclusions made of polylactic acid (PLA). The detection and evaluation of the damage intensity were made based on the comparison between the impedance functions measured before and after the damage, using damage metrics.
Keywords
Structural Health Monitoring, Electromechanical impedance technique, Piezoelectric transducers, Silicone rubber, PLA inclusion
