Abstract:
There are many influencing factors in the infrared thermal wave detection of composite materials. In this paper, the finite element numerical simulation method is used to simulate the infrared thermal wave detection on the effect of the defects diameter, defect thickness, defect depth, defect materials, heat flux, heat excitation time and convection heat transfer coefficient based on the mathematical model of the three-dimensional transient infrared thermal wave detection. The influence of the above factors on detection parameters (temperature difference and contrast ratio) is analyzed. The results show that among the above factors the most influential factor is defect materials, and followed by the defect depth, thermal excitation time, heat flux, defect diameter, defect thickness, and convection heat transfer coefficient has the smallest impact on detection parameters, almost negligible.