Eventos Anais de eventos
COBEM 2017
24th ABCM International Congress of Mechanical Engineering
EVALUATION OF ADHESIVES USED ON E/M IMPEDANCE METHOD APPLIED IN SHAFT UNDER FATIGUE TESTS
Submission Author:
Karina Mayumi Tsuruta , MG
Co-Authors:
Caroline Guimarães, Diogo de Souza Rabelo, Aldemir Ap Cavalini Jr, Roberto Mendes Finzi Neto, Valder Steffen Jr, Karina Mayumi Tsuruta
Presenter: Aldemir Ap Cavalini Jr
doi://10.26678/ABCM.COBEM2017.COB17-5394
Abstract
The impedance-based structural health monitoring technique (SHM) has been widely investigated in the last years. This nondestructive method requires low-weight PZT patches with high frequency actuation/response capability to detect incipient damage in mechanical structures. However, the adhesive used to bond the transducers to the host structure can affect the performance of the technique. In this context, this paper is dedicated to evaluates the performance of PZT transducers bonded on steel shafts specimens by using three different adhesives, namely: epoxy 01, epoxy 02, and an ethyl-polyoxysilane based adhesive. Four PZT patches were bonded to each shaft. To evaluate the performance of the adhesives considering the shafts excited by dynamic loads, successive fatigue tests with 500,000 cycles were performed in each shaft. The stress applied to the shafts kept the specimens in the elastic phase. The acquisition of the impedance signatures was done considering two structural conditions, namely: i) pristine condition and ii) after each fatigue cycle. After ten successive fatigue tests, it was possible to observe that the adhesives used clearly presented different performances. It is worth mentioning that there are few studies regarding the effects of adhesive on the performance of the impedance-based SHM technique.
Keywords
Adhesive, Structural Health Monitoring (SHM), Piezoelectric transducers, Electromechanical Impedance Method, Fatigue Test
