Nondestructive inspection and structural health monitoring of aerospace materials

• Published in: Aerospace Materials: Novel Technologies and Practical Applications
• Main Author: Krishnamoorthy R.R.; Marius D.
• Format: Book chapter
• Language: English
• Published: Elsevier 2024
• Online Access: https://www.scopus.com/inward/record.uri?eid=2-s2.0-85218395658&doi=10.1016%2fB978-0-443-22118-7.00007-5&partnerID=40&md5=261e0d4321423414870ad6edf08dd874

This research endeavor delves into a comprehensive investigation and comparative analysis of nondestructive inspection (NDI) and structural health monitoring (SHM) technologies pertinent to aerospace materials. The fundamental issue addressed is the exigency for reliable, efficacious inspection methodologies that can access the integrity and safety of aerospace structures without inflicting damage. The focal points of examination encompass the distinctive penetration rates, spectral energy, detection accuracy, and system intricacies inherent in terahertz, infrared, visible multispectral, and X-ray NDI technologies. The objectives entail an exhaustive evaluation of each technology’s capabilities, including their respective strengths and limitations. Aerospace components, such as composites, metals, and alloys, are the target materials scrutinized throughout this study. The methodology employs a meticulous review of pertinent literature and research papers, elucidating the principles and applications of terahertz, infrared, visible multispectral, and X-ray NDI technologies within the aerospace industry. The outcomes reveal that the technology offers distinctive advantages concerning penetration depth, resolution, and material compatibility. Terahertz and infrared techniques demonstrate pronounced proficiency in detecting subsurface defects, while visible multispectral and X-ray methods furnish invaluable insights into internal structures. However, judicious consideration must be given to system complexity and cost when selecting the most suitable technology for specific aerospace applications. The principle conclusion derived from this research is that a combination of NDI and SHM techniques, tailored to the specific requirements of aerospace materials, can significantly enhance structural safety and maintenance practices. The application of these technologies is vital in ensuring the continuous monitoring and evaluation of aerospace structures, leading to improved performance and increased longevity. © 2025 Elsevier Inc. All rights reserved.