Degradation of the tensile property of carbon-fiber/epoxy laminated plates irradiated by laser

摘要

This research studied the relationship between the ablation and the tensile strength change of carbon-fiber/epoxy composite under laser irradiation. Both experimental and numerical modeling methods were applied to a 2 mm thick Carbon/epoxy laminates sample. A 1070 nm continuous wave laser was chosen as the irradiation source. In order to .reach different ablation states of the sample, power and exposure time of the laser were adjusted to obtain different experimental conditions. The tensile strength of ablated samples was measured to investigate the degradation tendency of tensile strength. It was found that the degradation curve of tensile strength versus laser intensity and irradiation time follows inversed power-law. This is to say, the tensile strength decreases rapidly as the laser intensity and irradiation time increases. The mathematical model has been developed to analyze the surface temperature and the changing tendency of tensile strength. The modeling results match experimental data well.