Numerical simulation of the mechanical behavior of a large smart composite platform under static loads

摘要

The DECID2 French National Project (FUI, DGCIS) carried out within the period 2008-2012 involved the construction of a platform of large dimensions made entirely of smart composites. Two demonstrators were manufactured and installed, the target being to experiment and model their performances under mechanical and environmental aging. Despite significant progress, a number of issues have not been solved yet within the project's framework and are related to the negative effects of bolt fastening on the composites' profiles. In this study, numerical simulations were run to predict the mechanical behavior of a bolt-fastened platform composed primarily of unidirectional E-glass composite beams under static three-point bending loads. Results yielded thresholds for matrix tensional and compressional damage initiation which will be used in future non-destructive tests on the structure. Furthermore, the presence of fiber optic sensors embedded in a beam of the platform was investigated numerically to determine the effect of the presence the sensors on the mechanics of the beam. Results predicted minimal change in stiffness between scenarios with and without the embedded sensors. (C) 2015 Elsevier Ltd. All rights reserved.