Computational methodology of damage detection on composite cylinders: structural health monitoring for automotive components

摘要

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.