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Damage Tolerance Assessment of Naval Sandwich Structures with Face-Core Debonds

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Advances in Thick Section Composite and Sandwich Structures

Abstract

The presence of face-core debonds can seriously reduce the load-carrying capacity and remaining lifetime of sandwich structures. During the past 30 years considerable progress has been made in the modelling and experimental testing of sandwich structures for marine applications, especially with regard to the effects of such debonds. Much of this research has been supported by the US Office of Naval Research. This chapter summarises these developments, with special emphasis on the progress made during the past 10–15 years concerning foam-cored sandwich for naval applications. Fracture mechanics based analysis methods, experimental techniques for characterising face-core interfaces under mode I, mode II and mode III deformations and their combinations, and analysis and testing of structural elements such as beams, columns and panels in the presence of debonds are described. The assessment of observed debond damage in naval sandwich structures is addressed, and the implications for ensuring acceptable damage tolerance are discussed.

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Acknowledgements

Compilation of this chapter was supported by Office of Naval Research Grant N00014-16-1-2977. The support, interest and encouragement of the ONR Solid Mechanics Program Manager, Dr. Y.D.S. Rajapakse, in this and the other ONR-funded research activities described in the chapter, are gratefully acknowledged.

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  1. Department of Mechanical Engineering, Technical University of Denmark, Kongens Lyngby, Denmark

    Christian Berggreen & Brian Hayman

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  1. Christian Berggreen
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Correspondence to Christian Berggreen .

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  1. Department of Aerospace Engineering, University of Maryland, College Park, College Park, MD, USA

    Sung W. Lee

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Berggreen, C., Hayman, B. (2020). Damage Tolerance Assessment of Naval Sandwich Structures with Face-Core Debonds. In: Lee, S. (eds) Advances in Thick Section Composite and Sandwich Structures. Springer, Cham. https://doi.org/10.1007/978-3-030-31065-3_15

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