Eventos Anais de eventos
MecSol 2017
6th International Symposium on Solid Mechanics
FINITE ELEMENT ANALYSIS OF THE LAMB WAVES BEHAVIOR ON THE LEADING EDGE OF WINGS AND WIND TURBINE BLADES MADE OF COMPOSITES
Submission Author:
Guilherme André Santana , MG , Brazil
Co-Authors:
Mohammad Malekan, Lázaro Donadon, Carlos Alberto Cimini Junior
Presenter: Guilherme André Santana
doi://10.26678/ABCM.MecSol2017.MSL17-0046
Abstract
The behavior of Lamb Waves (Surface Waves) for thin composite plates is well known. The underlying physics of these waves are being used in the field of Structural Health Monitoring, to access the existence, the location and the size of damages on aerospace and composite structures overall, including wind turbine blades. However, no thorough study was made regarding the effect of the high curvature to thickness ration in the leading edge of those structures. This characteristic changes the Lamb Waves and, hence, the algorithms for accessing damage need to account for that. This work shows the expected changes on the Lamb Waves for specific glass fiber reinforced polymer skins for many values of curvature to thickness on the leading edge, showing trends that can be used on future modifications of the algorithm for structural health monitoring of those structures. This study is done through finite element method using a dynamic explicit analysis of orthotropic constitutive model and continuum shell elements, using an automated macro of an ABAQUS model, generating trends of speed change versus curvature to thickness ratio. It is shown that the analysis for high curvature skins changes considerably from the analysis of plates (plane skins), for values of curvature common for modern airfoils
Keywords
SHM, wind turbine blades, wing, curvature, Lamb Wave (LW), Finite Element Method
