Utilização da técnica de termografia e de simulação computacional para detecção de defeitos em compósitos de fibra de carbono

Abstract

The main objective of this work is to analyze the nondestructive technique of pulsed active thermography for the inspection of carbon fiber reinforced polymer composites (CFRP) and detection of defects that may occur in these materials. Test specimens were extracted from a cross section of a CFRP tube, where defects with different diameters and depths were machined. In addition, a corresponding virtual solid model was constructed for computational simulation of the technique, in order to reproduce numerically the physical phenomena present in thermographic tests. Through the validation of the computational simulation model and the data set obtained experimentally, it was possible to analyze the influence of the geometric parameters of the defects in the thermal contrast of the same and also to estimate the detection limit of the technique of pulsed active thermography for inspection of these materials by the side opposite the defects.