Characterization of the dynamic behaviour of flax fibre reinforced composites using vibration measurements

[摘要] Experimental and numerical methods to identify the linear viscoelastic properties of flax fibre reinforced epoxy (FFRE) composite are presented in this study. The method relies on the evolution of storage modulus and loss factor as observed through the frequency response. Free-free symmetrically guided beams were excited on the dynamic range of 10 Hz to 4 kHz with a swept sine excitation focused around their first modes. A fractional derivative Zener model has been identified to predict the complex moduli. A modified ply constitutive law has been then implemented in a classical laminates theory calculation (CLT) routine.

[发布机构] DRIVE EA1859, Université de Bourgogne Franche-Comté, Nevers; 58027, France^1

[效力级别] 运输工程 [学科分类] 工业工程学

[关键词] Complex modulus;Constitutive law;Dynamic behaviours;Experimental and numerical methods;Fractional derivatives;Linear viscoelastic;Swept-sine excitation;Theory calculation