Delamination due to fatigue loading in laminated composites is difficult to detect and, therefore, could lead to catastrophic failure if left undetected. Hence, it is important to be able to detect and quantify the delamination crack growth behavior due to fatigue loading and explore methods to heal the delamination in situ, without the need for mechanical fasteners. To this end, double cantilever beam specimens of carbon-fiber-reinforced polymer composite containing thermoplastic healants were manufactured, and mode I fatigue delamination experiments were carried out for the virgin and healed cases for oven healing, and in situ macro fiber composite healing cases. The primary purpose of using thermoplastic healants (polycaprolactone and shape memory polymer) was to heal the cracks formed during fatigue loading and regain the load-carrying capacity of the composite structure. The in situ healing was carried out by activating the macro fiber composite actuators attached to the double cantilever beam specimen after 5000 cycles of loading to generate heat. After in situ healing, significant reduction in crack growth compared to the virgin cycle was observed, and healing was repetitive. We envision that these findings will be immensely helpful in extending the service life of composites and may also result in significant repair cost savings.


    Access

    Check access

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Fatigue Crack Growth Mitigation by In Situ Healing in Thermoset CFRP Composite


    Contributors:

    Published in:

    AIAA Journal ; 61 , 9 ; 4140-4148


    Publication date :

    2023-07-13


    Size :

    9 pages




    Type of media :

    Article (Journal)


    Type of material :

    Electronic Resource


    Language :

    English





    In-situ Healing of Mode-I Fatigue Crack in Fiber Reinforced Composites

    Vishe, Nilesh J. / Mulani, Sameer B. / Roy, Samit | AIAA | 2021


    Thermoset adhesive sheet for CFRP,and the forming technique to surface of CFRP using trancefer release paper

    Hoshi, K. / Kuroki, J. / Ueki, T. et al. | British Library Conference Proceedings | 2010



    Self-Healing of Impact Damaged CFRP

    Williams, Gareth / Trask, Richard / Bond, Ian | AIAA | 2007