Non-Destructive Evaluation—A Pivotal Technology for Qualification of Composite Aircraft Structures

Srinivasa, V and Sanjeev Kumar, S and Ramesh Kumar, M and Sudheendra, HN and Madhava, MR (2009) Non-Destructive Evaluation—A Pivotal Technology for Qualification of Composite Aircraft Structures. In: National Conference on Scientific Achievements of SC & ST Scientific & Technologists, 14-16 April 2009, Bangalore.

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Tremendous advances in composite materials and a deeper understanding of their behavior have been responsible for the increased use of composites in the development of advanced, new generation civil and military aircraft. Composites play an important role in any aircraft development programme and are strong contenders to their metal counterparts due to their significant contributions towards improving strength, stiffness, fatigue properties & weight reduction. As materials, structural design & processing have evolved, strong emphasis is placed on effective & reliable damage detection, durability and damage tolerance. As a consequence, Non-destructive Evaluation (NDE) has also undergone significant advances towards meeting the growing demands of quality assurance. Advanced Composites Division (ACD) of National Aerospace Laboratories (NAL), has been involved in the development of composite structures for both civil and military aircraft for over a decade and a half. Innovative composite processing methods like co-curing/co-bonding have been successfully employed to realize airworthy structures. The role of NDE in the development of these structures has been critical and not limited to damage detection alone. On several occasions, NDE has provided valuable inputs towards improving design and process parameters. In-spite of the complexity of the structures, stringent quality requirements and tight delivery schedules, NDE has been successful in certifying these composite structures for airworthiness. This paper discusses the implementation of key NDE techniques like ultrasonics, radiography, acoustic emission and thermography for reliable flaw detection, characterization and quality assurance of composite aircraft structures.

Item Type: Conference or Workshop Item (Paper)
Uncontrolled Keywords: Composites, Quality Assurance, Non-destructive Evaluation, Ultrasonics, Infrared Thermography, Acoustic Emission, Radiography.
Subjects: CHEMISTRY AND MATERIALS > Composite Materials
Depositing User: Ms Indrani V
Date Deposited: 24 Jan 2012 04:29
Last Modified: 24 Jan 2012 04:29

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