A large deformation four-point bending fixture was used to test thin unidirectional composite laminas primarily used in strain energy deployable space structures. The tests allowed investigation of the large strain elastic constitutive behavior of two aerospace-grade intermediate modulus carbon fibers, a high modulus carbon fiber, and a structural glass fiber. Thermoset plastic coupons reinforced with these fibers and ranging in thickness from 0.1 to 0.5 mm were tested. A nonlinear empirical constitutive model was used to represent fiber axial tensile and compressive behavior and through a structural model, predict coupon flexural response and estimate constitutive model parameters. Intermediate modulus carbon fibers were found to be significantly nonlinear with modulus linearly increasing with strain. At failure, the fiber tangent modulus in tension was 2 to 3.1 times higher than in compression. The modulus of glass fibers was essentially constant. High modulus carbon fibers exhibited a more complex response with flexural stiffness initially slightly increasing followed by a moderate reduction in stiffness and finally, a sharp reduction in stiffness and failure. Presented as Paper 2013-1668 at the 54th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference, Boston, MA, 8-11 April 2013


    Access

    Access via TIB

    Check availability in my library

    Order at Subito €


    Export, share and cite



    Title :

    Large Strain Four-Point Bending of Thin Unidirectional Composites




    Publication date :

    2015




    Type of media :

    Article (Journal)


    Type of material :

    Print


    Language :

    English



    Classification :

    BKL:    55.60 Raumfahrttechnik
    Local classification TIB:    770/7040



    Large Strain Four-Point Bending of Thin Unidirectional Composites

    Murphey, Thomas W. / Peterson, Michael E. / Grigoriev, Mikhail M. | AIAA | 2015


    Four Point Bending of Thin Unidirectional Composite Laminas

    Murphey, Thomas W. / Peterson, Michael E. / Grigoriev, Mikhail M. | AIAA | 2013


    Four Point Bending of Thin Unidirectional Composite Laminas

    Murphey, T.W. / Peterson, M.E. / Grigoriev, M.M. et al. | British Library Conference Proceedings | 2013


    Large Strain Behavior of Thin Unidirectional Composite Flexures

    Sanford, G. / Biskner, A. / Murphey, T. et al. | British Library Conference Proceedings | 2010


    Large Strain Behavior of Thin Unidirectional Composite Flexures

    Sanford, Greg / Biskner, Adam / Murphey, Thomas | AIAA | 2010