3D photothermal reconstruction of subsurface defects in notched multidirectional CFRP laminates due to tensile fatigue loading. (October 2022)

• Record Type: Journal Article
• Authors: Gahleitner, L.; Thummerer, G.; Reitinger, B.; Meirer, K.; Mayr, G.
• Is Part Of: NDT & E international. Volume 131(2022)
• Publication Date: 2022-10
• Subjects: Fibrous composites -- Multidirectional laminates -- Subsurface defects -- Pulsed thermography -- Virtual wave concept -- Photothermal reconstruction; Nondestructive testing -- Periodicals; Contrôle non destructif -- Périodiques; Electronic journals; 620.1127
• DOI: 10.1016/j.ndteint.2022.102702
• Languages: English
• ISSNs: 0963-8695

Abstract

Abstract: This paper presents results from 3D photothermal reconstruction of real subsurface defects in carbon fiber-reinforced polymers using the virtual wave concept. We apply pulsed thermography during and after interrupted fatigue loading in tensile-tensile configuration for notched multidirectional laminates. In addition, we discuss the influence of the ambient conditions from in-situ photothermal testing on the virtual wave signal. The results obtained from 3D photothermal reconstruction are directly compared with those obtained from laser ultrasound testing. To summarize, we demonstrate a practicable and fast 3D photothermal evaluation of subsurface defect evolution utilizing the virtual wave concept.