Automated fiber placement technology has pushed for the need to explore nonconventional fiber paths in laminated composites. This paper investigates optimal spatially varying fiber paths in a symmetric linear orthotropic laminate, which could increase the critical buckling temperature under uniform applied thermal loads. The key idea here is to achieve gains in buckling performance yet focus on manufacturability of the obtained optimal fiber path. The subject of this study is a four-layer symmetric orthotropic laminated plate, with a central circular cutout that is clamped on all the edges. A novel finite element algorithm is proposed, which imposes a condition on the definition of discrete fiber angles within each element. The main objectives of the proposed finite element approach are to maintain continuity of the fiber paths and to use a computationally efficient model by reducing the number of optimization variables.


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    Title :

    Fiber Path Optimization of Symmetric Laminates with Cutouts for Thermal Buckling



    Published in:

    Publication date :

    2017




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.50 Luftfahrzeugtechnik / 55.50
    Local classification TIB:    770/7040



    Fiber Path Optimization of Symmetric Laminates with Cutouts for Thermal Buckling

    Acar, Pınar / Vijayachandran, Avinkrishnan A. / Sundararaghavan, Veera et al. | AIAA | 2016



    Buckling of cylinders with cutouts

    ALMROTH, B. | AIAA | 1969


    Buckling of cylinders with cutouts

    ALMROTH, B. | AIAA | 1970