  In this paper, equilibrium and stability equations of functionally graded
material (FGM) plate under thermal environment are formulated based on
isogeometric analysis (IGA) in combination with higher-order shear deformation
theory (HSDT). The FGM plate is made by a mixture of two distinct components,
for which material properties not only vary continuously through thickness
according to a power-law distribution but also are assumed to be a function of
temperature. Temperature field is assumed to be constant in any plane and
uniform, linear and nonlinear through plate thickness, respectively. The
governing equation is in nonlinear form based on von Karman assumption and
thermal effect. A NURBS-based isogeometric finite element formulation is
utilized to naturally fulfil the rigorous C1-continuity required by the present
plate model. Influences of gradient indices, boundary conditions, temperature
distributions, material properties, length-to-thickness ratios on the behaviour
of FGM plate are discussed in details. Numerical results demonstrate excellent
performance of the present approach.
