Composite sandwich structures are widely used for their mechanical properties combined to lightweight. However, damage area quantification caused by low velocity impacts represents generally a crucial task in sandwich composites. In the last years, recent advantages of thermographic devices offer new promising and different real-time industrial and engineering applications where lower computation time, accuracy of results and convenient cost are required. The present research deals with the comparison of standard or latest image-processing methods proposed for pulsed thermography regarding their suitability for determining the impact damage area in sandwich materials made of Aluminium core an a GFRP laminated skins. The Infra-Red processed results are compared with the advanced ultrasonic Phased array method commonly employed in the industrial Non-Destructive Testing. Specifically, the damage area quantification is performed by means of an appropriate MATLAB binarization algorithm for the post-processing of acquired thermal and ultrasonic maps. The data results verify the effectiveness of the image-processing thermographic technique combined to advanced processing approaches for the quantitative assessment of impact damage in sandwich component.

复合材料夹层结构因其机械性能和轻量化而被广泛应用。然而，低速冲击引起的损伤面积量化通常是夹层复合材料中的一项关键任务。近年来，热成像设备的最新优势提供了新的、有前景的、不同的实时工业和工程应用，这些应用需要更少的计算时间、结果的准确性和方便的成本。目前的研究涉及对脉冲热成像提出的标准或最新图像处理方法的比较，以确定它们是否适合确定由铝芯和 GFRP 层压蒙皮制成的夹层材料的冲击损伤区域。将红外处理结果与工业无损检测中常用的先进超声波相控阵方法进行比较。具体来说，损伤区域的量化是通过适当的 MATLAB 二值化算法来执行的，用于对获取的热图和超声波图进行后处理。数据结果验证了图像处理热成像技术与先进处理方法相结合对夹层部件冲击损伤进行定量评估的有效性。