Eventos Anais de eventos
MECSOL 2019
7th International Symposium on Solid Mechanics
Structural Health Monitoring Algorithm for Composite Plates using Lamb Wave Response Measured by Piezo Transducers
Submission Author:
Luis Eduardo Jaramillo Bustamante , SP
Co-Authors:
Luis Eduardo Jaramillo Bustamante, Edison jair Bejarano sepulveda, Volnei Tita, Marcelo Leite Ribeiro
Presenter: Luis Eduardo Jaramillo Bustamante
doi://10.26678/ABCM.MECSOL2019.MSL19-0097
Abstract
When compared to metals, composite materials exhibit superior structural performance due to their higher Stiffness-to-weight ratio and corrosion resistance, becoming attractive for applications in aerospace structures. However, the economic impact of their rigorous preventive maintenance, which is required due to the complex damage mechanics of carbon fiber composites, has hindered a more extensive use. Intelligent and reliable damage detection and monitoring —as part of a larger Structural Health Monitoring (SHM) scheme— using Lamb waves have been extensively proposed and it is a hot research topic. In this paper, a SHM algorithm using lamb waves excited and sensed by piezoelectric transducers is presented. Also, a numerical example with a unidirectional Carbon Fiber plate is used to show its application. The model detects discontinuities (or damages) along a straight line of three transducers by comparing the Lamb wave response in pristine and damaged states, by estimating a Mean-Decay Ratio (MDR) and acoustic impedances which are used to locate and quantify the extent of the damage.
Keywords
Lamb Waves, Damage Detection, Composite Materials, Simulation
