Abstract
As a first endeavor, this study scrutinizes the effects of general lamination schemes on the natural frequencies and loss factors of simply supported doubly-curved laminated composite panels. Transversely isotropic fibers obey linear elastic rule while isotropic polymeric matrix follows both standard solid and Kelvin-Voigt viscoelastic models. Frequency-dependent properties are obtained by multi-cell micromechanical approach and Alfrey correspondence principle. The governing equations of motions with frequency-dependent shear-stretching, bending-stretching and bending-twisting couplings are derived using Hamilton principle and third-order shear deformation theory. The coupled PDEs of motions are figured out via Galerkin method and eigenvalue solver. To verify, vibrational characteristics are compared with available results of elastic laminated panels and viscoelastic sandwich plates. Then, the effects of constitutive relations, fiber volume fraction, different fibers, geometrical parameters, symmetric, anti-symmetric and asymmetric laminations schemes are investigated on vibrational characteristics of spherical, cylindrical and hyperboloid panels. Also, crossing phenomenon and curve veering of frequencies and loss factors are observed.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.