Title: Computational methodology of damage detection on composite cylinders: structural health monitoring for automotive components
Authors: Ricardo De Medeiros; Marcelo Leite Ribeiro; Volnei Tita
Addresses: Department of Aeronautical Engineering, São Carlos School of Engineering, University of São Paulo, Av. João Dagnone – 1100, 13573-120, São Carlos, SP, Brazil ' Federal University of Santa Catarina, Rua Prudente de Moraes 406, Joinville, Brazil ' Department of Aeronautical Engineering, São Carlos School of Engineering, University of São Paulo, Av. João Dagnone – 1100, 13573-120, São Carlos, SP, Brazil
Abstract: A numerical investigation of the damage effects on the structural response of the composite cylinders damaged by impact loading was performed. A computational methodology, which consists of carrying out four-step finite element (FE) analyses in progressive sequence, was used. Firstly, modal analyses were carried out for the intact structure to determine the natural frequencies and modal shapes. Then, vibration analyses were performed for intact structure to obtain the frequency response function (FRF). After that, impact analyses were performed by using a material model, which is accessed to predict the damage. Based on damaged FE model, vibration analyses, again, were carried out to determine the new FRF. Thus, the results of the damaged structure were combined to intact model results by using a specific metric in order to indicate the damage or not in the composite cylinders. Finally, it was discussed about the advantages and limitations of SHM systems, which use vibration-based methods and piezoelectric sensors.
Keywords: structural health monitoring; SHM; laminated composites; finite element analysis; FEA; vibration analysis; automotive composites; automotive components; damage detection; composite cylinders; impact loading; modal analysis; natural frequency; frequency response function; FRF; piezoelectric sensors.
International Journal of Automotive Composites, 2014 Vol.1 No.1, pp.112 - 128
Received: 31 Oct 2013
Accepted: 28 Mar 2014
Published online: 30 Aug 2014 *