A confidence map based damage assessment approach using pulsed thermographic inspection. (January 2018)

• Record Type: Journal Article
• Authors: Zhao, Yifan; Addepalli, Sri; Sirikham, Adisorn; Roy, Rajkumar
• Is Part Of: NDT & E international. Volume 93(2018)
• Page Start: 86
• Page End: 97
• Publication Date: 2018-01
• Subjects: NDT -- Reliability -- Thermography -- Impact damage assessment -- Composite; Nondestructive testing -- Periodicals; Contrôle non destructif -- Périodiques; Electronic journals; 620.1127
• DOI: 10.1016/j.ndteint.2017.10.001
• Languages: English
• ISSNs: 0963-8695

Abstract

Abstract: In the context of non-destructive testing, quantification of uncertainty caused by various factors such as inspection technique, testing environment and the operator is important and challenge. This paper introduces a concept of contour-based confidence map and an application framework for pulsed thermography that offers enhanced flexibility and reliability of inspection. This approach has been successfully applied to detect three flat-bottom holes of diameter 32, 16 and 8 mm drilled onto a 5 mm thick aluminium plate with a high accuracy of damage detection (R > 0.97). Its suitability and effectiveness in assessing impact damage occurring in composites have also been demonstrated. Highlights: A contour-based confidence map for enhanced damage assessment has been introduced. An APTC method for improved temperature contrast for multiple defects is proposed. A confidence map based thermography inspection framework has been introduced.