Hygro-thermo-mechanical buckling of laminated beam using hyperbolic refined shear deformation theory

In this paper, the buckling of cross-ply and angle-ply composite beams under hygro-thermo-mechanical loading is presented by the analytical approach. This approach is based on theory of hyperbolic refined shear deformation. This approach which has strong resemblance with beam theory of Euler Bernoulli in various aspects, accounts for a second-degree variation of the transverse shear strains through the thickness and verified the zero traction of boundary conditions on the bottom and top beam surfaces sans employing shear correction factors. The effects of temperature and moisture concentration, thus the effect of the ratios of modulus, length to thickness and coefficient of thermal expansion respectively on hygro-thermo-mechanical buckling of cross-ply and angle-ply laminated beams are studied.