Innovative hybrid materials developed at Delft University of Technology (e.g., ARALL and GLARE) dramatically reduce life-cycle costs and offer a great opportunity for service life extension of legacy aircraft. Replacement or repair of damaged aircraft components requires high-strength composite materials with high tailorability, fatigue, and impact-damage resistance, all of which are offered by the advanced hybrid materials. In addition, a reliable fatigue-life evaluation methodology for hybrid structures of arbitrary layup, configuration, constituent materials, and geometry is necessary. An efficient computational framework is presented for simulation of fatigue fracture in fiber-metal laminates based on the homogenized laminate modeled with large shell elements and cohesive zone used to simulate crack propagation. The cohesive traction-separation relationship is calibrated against the analytical solution for the strain-energy release rate, which explicitly accounts for the effect of fiber bridging. Appropriate calibration of the cohesive energy results in approximately constant crack-growth rate, a characteristic for fiber-metal laminates, as well as an accurate distribution of bridging stresses for the considered crack and delamination configurations. The proposed methodology is illustrated by simulating an experimental test conducted on a large glass-laminate-aluminum-reinforced-epoxy panel subjected to a constant-amplitude fatigue loading.


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    Titel :

    Finite Element Modeling of Fatigue in Fiber–Metal Laminates



    Erschienen in:

    Erscheinungsdatum :

    2015




    Medientyp :

    Aufsatz (Zeitschrift)


    Format :

    Print


    Sprache :

    Englisch


    Schlagwörter :

    Klassifikation :

    BKL:    55.50 Luftfahrzeugtechnik / 55.60 Raumfahrttechnik / 55.60 / 50.93 / 55.50 / 50.93 Weltraumforschung
    Lokalklassifikation TIB:    770/7040



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    Woelke, Pawel B. / Rutner, Marcus P. / Shields, Michael D. et al. | AIAA | 2015


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    Toi, Y / Fujiwara, Y | AIAA | 1995


    Stochastic Finite Element Modelling of Fibre-Metal Laminates

    Chung, Doo Bo / Gutierrez, Miguel / Remmers, Joris et al. | AIAA | 2004


    Fiber-Metal-Laminates

    Huhne, C. / Petersen, E. / European Space Agency | British Library Conference Proceedings | 2014