High-order buckling and free vibration analysis of two types sandwich beam including AL or PVC-foam flexible core and CNTs reinforced nanocomposite face sheets using GDQM

摘要: Abstract In the present study, high-order buckling and free vibration behaviors of two types sandwich beams including AL or PVC-foam flexible core CNTs reinforced nanocomposite face sheets using generalized differential quadrature method (GDQM) are investigated. The panel theory (HSAPT) for is employed also modified couple stress (MCST) used. It noted that first beam Aluminum alloy foam with variable mechanical properties other consists temperature dependent properties. governing partial equations motion derived Hamilton's principle then discretized by GDQM. These formulations yield nine which coupled in axial transverse deformations. A parametric study carried out to investigate effect some important parameters such as slenderness ratio, sheet thickness, rise. Although increasing reduce 1st natural frequency critical load, but treatment different AL-FCSB PVC-FCSB. found at high temperatures, PVC-FCSB decreases thickness whereas high-temperatures although less low ratio increases. This behavior due large their dependence short compared long ones.