Free vibration analysis of in-plane functionally graded plates using a refined plate theory and isogeometric approach

This paper investigates the free vibration behaviors of functionally graded (FG) plates considering in-plane material inhomogeneity. Isogeometric analysis (IGA) in conjunction with a refined plate theory (RPT) is employed for fulfilling the investigation. In RPT, the displacement field is described only with four unknown variables and shear correction factor is not necessary any more. A new transverse shear stress function is proposed by...