LAMINATION-DEPENDENT SHEAR DEFORMATION MODELS FOR BENDING OF ANGLE-PLY LAMINATED PLATES

Lamination-dependent shear corrective terms in the analysis of bending of laminated plates are derived from a priori assumed linear thicknes swise distributions for gradients of transverse shear stresses by usin g CLPT inplane stresses in the two in-plane equilibrium equations of e lasticity in each ply. In the development of a general model for angle -ply laminated plates, special cases like cylindrical bending of lamin ates in either direction, symmetric laminates, cross-ply laminates, an tisymmetric angle-ply laminates, homogeneous plates are taken into con sideration. Adding these corrective terms to the assumed displacements in (i) Classical Laminate Plate Theory (CLPT) and (ii) Classical Lami nate Shear Deformation Theory (CLSDT), two new refined lamination-depe ndent shear deformation models are developed. Closed form solutions fr om these models are obtained for antisymmetric angle-ply laminates und er sinusoidal load for a type of simply supported boundary conditions. Results obtained from the present models and also from Ren's model (1 987) are compared with each other.