Large-Amplitude Vibration Analysis of Shear Deformable Laminated Composite Cylindrical Shells with Initial Imperfections in Thermal Environments

Large-amplitudevibrationanalysisforasheardeformablecross-plylaminatedcompositecylindricalshellof finitelengthinthermal environmentsispresented.Thematerialofeachlayeroftheshellisassumedtobelinearlyelasticand fiberreinforced.Themotionequationsare basedonReddy's higher-order shear deformation shell theory with a von Karman-Donnell-type of kinematic nonlinearity. The thermal effects and initial imperfections of the shell are both taken into account. A two-step perturbation technique is employed to determine the linear and nonlinear frequency of the laminated cylindrical shells. The numerical illustrations concern the nonlinear vibration behavior of laminated composite cylindrical shells with different values of geometric parameters and different cases of thermal environmental conditions. The results showthattheshellhasrelativelylowernaturalfrequencieswhenthetemperature-dependentpropertiesaretakenintoaccount.Theresultsreveal that the temperature changes, initial imperfections of the shell, and the shell geometric parameter have significant effects on the nonlinear vibration behavior of laminated composite cylindrical shells. DOI: 10.1061/(ASCE)EM.1943-7889.0000675. © 2014 American Society of Civil Engineers. Authorkeywords:Cross-plylaminatedcomposites;Cylindrical shell;Higher-ordersheardeformationshelltheory;Temperature-dependent properties; Large-amplitude vibration.