Low-velocity impact damage characterization of carbon fiber reinforced polymer (CFRP) using infrared thermography
Institution:
1. Xi׳an High-Tech Institute, Shaanxi, Xi׳an 710025, China;2. State Key Laboratory of Tribology, Tsinghua University, Beijing 100084, China;1. Université de Toulouse, INP/ENIT, LGP, Tarbes, France;2. Institut Clément Ader, IUT de Tarbes, Dpt GMP, 1 rue Lautréamont, 65016 Tarbes, France;2. Inspection and Measurement Department, IDEKO-IK4 Technological Centre, C/Arriaga industrialdea 2, E-20870 Elgoibar, Spain;1. Department of Civil and Architectural Engineering, Changsha University, Changsha 410003, PR China;2. College of Mechatronics Engineering and Automation, National University of Defense Technology, Changsha 410073, PR China
Abstract:
Carbon fiber reinforced polymer (CFRP) after low-velocity impact is detected using infrared thermography, and different damages in the impacted composites are analyzed in the thermal maps.The thermal conductivity under pulse stimulation, frictional heating and thermal conductivity under ultrasonic stimulation of CFRP containing low-velocity impact damage are simulated using numerical simulation method. Then, the specimens successively exposed to the low-velocity impact are respectively detected using the pulse infrared thermography and ultrasonic infrared thermography. Through the numerical simulation and experimental investigation, the results obtained show that the combination of the above two detection methods can greatly improve the capability for detecting and evaluating the impact damage in CFRP. Different damages correspond to different infrared thermal images. The delamination damage, matrix cracking and fiber breakage are characterized as the block-shape hot spot, line-shape hot spot, and “
