Quartz fiber reinforced resin matrix composites drilled with the blind holes of various diameters and various depths were prepared in order to simulate defects of air voids or delaminations under the surface of the material.The three-dimensional model of quartz fiber reinforced resin matrix composite plate sample with blind hole defects was established by numerical simulation.The infrared thermal imaging detection process of the plate sample with blind holes was simulated and calculated.The influence of the size,depth and distribution of blind holes,the intensity of pulse heat source and heating time on the infrared thermal imaging detection signal was mainly studied.The results indicate that increasing in a certain range,the larger the defect diameter depth ratio is,the larger the maximum temperature difference is,the easier it is to be detected,and the larger the maximum temperature difference contrast is,the clearer it is displayed in the infrared thermal imaging.The greater the intensity and heating time of the pulse heat source,the easier the defects are detected.Increasing the intensity and heating time of the pulse heat source cannot improve the clarity of defects in the infrared thermal imaging.
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