Santos, Hugo A.F.A.2018-11-072018-11-072017-04SANTOS, Hugo A. F. A. – A novel finite element formulation for the buckling analysis of layered composite beam structures. In 3rd International Conference on Numerical and Symbolic Computation – SYMCOMP 2017. Guimarães, Portugal: APMTAC – Associação Portuguesa de Mecânica Teórica, Aplicada e Computacional, 2017. ISBN: 978-989-99410-3-8. Pp. 83-95978-989-99410-3-8http://hdl.handle.net/10400.21/9007A novel finite element formulation for the buckling analysis of two-layer composite beam structures will be presented. The beam elements possess a single flexible shear interface and each layer is modelled by means of Timoshenko’s theory. The formulation relies on a hybrid variational principle of complementary energy only involving force/moment-like variables as fundamental unknown fields. The approximate field variables are such that all equilibrium differential equations hold in strong form, and the inter-element equilibrium as well as the Neumann boundary conditions are enforced by means of the Lagrangian-multiplier method. The accuracy and effectiveness of the proposed formulation will be demonstrated through the analysis of several numerical tests.engComposite beamsBucklingTimoshenko theoryFeixes compostosTeoria de Timoshenkoconference object