Abstract
This paper presents an investigation on the nonlinear dynamic response of carbon nanotube-reinforced composite (CNTRC) plates resting on elastic foundations in thermal environments. Two configurations, i.e., single-layer CNTRC plate and three-layer plate that is composed of a homogeneous core layer and two CNTRC surface sheets, are considered. The single-walled carbon nanotube (SWCNT) reinforcement is either uniformly distributed (UD) or functionally graded (FG) in the thickness direction. The material properties of FG-CNTRC plates are assumed to be graded in the thickness direction, and are estimated through a micromechanical model. The motion equations are based on a higher-order shear deformation theory with a von Kármán-type of kinematic nonlinearity. The thermal effects are also included and the material properties of CNTRCs are assumed to be temperature-dependent. The equations of motion that includes plate-foundation interaction are solved by a two-step perturbation technique. Two cases of the in-plane boundary conditions are considered. Initial stresses caused by thermal loads or in-plane edge loads are introduced. The effects of material property gradient, the volume fraction distribution, the foundation stiffness, the temperature change, the initial stress, and the core-to-face sheet thickness ratio on the dynamic response of CNTRC plates are discussed in detail through a parametric study.
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Appendix
Appendix
for initially thermal stressed plates (immovable edge condition)
and for initially compressed stressed plates (movable edge condition)
in which P cr is the critical buckling load for the UD plate (or sandwich plate) under uniaxial compression in the X direction, and η is the load proportion ratio, defined by σ y =ησ x . In the above equations (with others are defined as in [12]).
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Wang, ZX., Shen, HS. Nonlinear dynamic response of nanotube-reinforced composite plates resting on elastic foundations in thermal environments. Nonlinear Dyn 70, 735–754 (2012). https://doi.org/10.1007/s11071-012-0491-2
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DOI: https://doi.org/10.1007/s11071-012-0491-2