Curved composite beams—optimum lay-up for buckling by ranking

摘要: Instability of laminated curved composite beams made repeated sublaminate construction is studied using finite element method. In construction, a full laminate obtained by repeating basic which has smaller number plies. This paper deals with the determination optimum lay-up for buckling ranking such (which may be solid or sandwich). For this purpose, use two-noded, 16 degress freedom beam element. The displacements u, v, w reference axis are expressed in terms one-dimensional first-order Hermite interpolation polynomials, and line member assumptions invoked formulation elastic stiffness matrix geometric matrix. nonlinear expressions strains, occurring subjected to axial, flexural torsional loads, incorporated general instability analysis. computer program developed been used, after extensive checking correctness, obtain orientation scheme plies so as achieve maximum load typical solid/sandwich beams.