An accurate and refined nonlinear beam model accounting for the Poisson effect

Abstract. In this paper, an enhanced beam model based on a 5-parameter displacement field, recently proposed by the authors and able to reproduce Poisson effect in transverse direction is presented, utilized simulate fully geometrically nonlinear response of elastic structures. The adoption linear solution as approximation functions for case allows prediction problems involving complex geometries with relatively small computational effort. Several numerical examples benchmark are analyzed, highlighting characteristic features five-parameter comparing results those obtained using classical Bernoulli 3D finite element model.