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Study of the ultrasonic compaction process of composite laminates - part I: process modeling

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Abstract

Recent advances in out-of-autoclave manufacturing processes for composite materials may require the compaction of the pre-preg plies just after placing them. Ultrasonic compactors are a good solution for this task. The quality of the compaction will depend on the frequency and amplitude of the ultrasonic vibration, which produces a viscous heating in the resin. The increase in temperature liquefies the resin, thus helping the air bubbles to escape. The study of how this heat is generated and distributed is fundamental to better understand and optimize the compaction process. In this work, the formulation of a thermomechanical model for the viscous heating of an uncured laminate of pre-preg plies due to ultrasonic vibrations is presented. In addition, a thermal model for the heat transfers to obtain the temperature distribution during the compaction process of composite layers will be shown.

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Acknowledgments

The authors would like to thank the EADS Chair of Aeronautical Studies of the University of Seville and the ESI Chair of the École Centrale de Nantes.

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Authors and Affiliations

  1. Grupo de Elasticidad y Resistencia de Materiales, Escuela Técnica Superior de Ingenieros, Universidad de Sevilla, Camino de los Descubrimientos, s/n, 41092, Sevilla, Spain

    J. Justo, E. Graciani & F. París

  2. Institut de recherche en génie civil et mécanique, École Centrale de Nantes, 1 Rue de la Noë, 44300, Nantes, France

    F. Chinesta

  3. Materials and Processes, Airframe Engineering, Airbus Operations S.L., Paseo John Lennon, 1, 28906, Getafe, Spain

    R. Ávila

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  1. J. Justo
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  2. E. Graciani
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  3. F. París
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  4. F. Chinesta
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  5. R. Ávila
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Correspondence to J. Justo.

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Justo, J., Graciani, E., París, F. et al. Study of the ultrasonic compaction process of composite laminates - part I: process modeling. Int J Mater Form 8, 613–623 (2015). https://doi.org/10.1007/s12289-014-1194-7

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  • DOI: https://doi.org/10.1007/s12289-014-1194-7

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