Continuous Interlaminar Shear Stress Analysis Of Laminated Fg-Cntrc Beams Based On An Extended High-Order Layerwise Model

This article presents continuous interlaminar shear stress analysis of laminated beams with functionally graded single-walled carbon nanotube reinforced composite (FG-CNTRC) layers based on an extended high-order layerwise model in the framework of the Carrera Unified Formulation (CUF). By considering the CNTs uniformly or functionally graded (FG) distributed through the thickness of each layer, the extended rule of mixture is adopted to estimate the effective material properties of the FG-CNTRC layers. The extended layerwise theory for laminated FG-CNTRC beams is formulated based on layerwise description of transverse shear stress field. With the introduction of stress variables at interfaces, a priori continuity of the transverse shear stress field is fulfilled. In the formulation of the extended model, the independent variations of material properties along the thickness of each FG layer are fully taken account. Then, finite element solution for static analysis is developed based on the proposed model. Comparisons with the results of other theoretical and high-fidelity finite element models well demonstrate the accuracy of the present model in predicting transverse shear stress analysis of laminated FG beams with different features. Besides, parameters studies are presented including the effects of CNTs distributions and CNTs orientation angles on bending behaviors of laminated FG-CNTRC beams.