LAMINATION-DEPENDENT SHEAR DEFORMATION MODELS FOR CYLINDRICAL BENDINGOF ANGLE-PLY LAMINATES

Lamination-dependent shear corrective terms in the analysis of flexure of laminates are derived from a priori assumed linear thicknesswise d istributions for gradients of transverse shear stresses and using them in the two in-plane equilibrium equations of elasticity in each ply. Adding these corrective terms to (i) Classical Laminate Plate Theory ( CLPT) displacements and (ii) Classical Laminate Shear Deformation Theo ry (CLSDT) displacements, four new refined lamination-dependent shear deformation models for angle-ply laminates are developed. Performance of these models is evaluated by comparing the results from these model s with those from exact elasticity solutions for antisymmetric 2-ply l aminates and for 4-ply [15/-15](s) laminates. In general, the model wi th shear corrective terms based on CLPT and added to CLSDT displacemen ts is sufficient and predicts good estimates, both qualitatively and q uantitatively, for all displacements and stresses.