Computational mechanics paper
Khorsandnia, N, Valipour, H, Foster, S, Crews, K 2014, '1D frame element formulation for analysis of layered composite beams', in ST Smith (ed.), 23rd Australasian Conference on the Mechanics of Structures and Materials (ACMSM23), vol. II, Byron Bay, NSW, 9-12 December, Southern Cross University, Lismore, NSW, pp. 795-800. ISBN: 9780994152008.
In this paper a numerical model for non-linear analysis of layered composite beams is developed. It takes advantage of an efficient 1D frame element with forced-based formulation. The developed element is equipped with lumped translational springs at the nodal points to model the partial shear interaction between the layers. Also, the proposed FE model can capture the material non-linearities as well as non-linear shear-slip behaviour of connections between the layers. The sections of frame element are discretised into fibres and the stiffness matrix of each section can be determined by integrating the stiffness of fibres over the section depth based on Navier-Bernoulli hypothesis. The superior performance of the developed FE model for capturing the behaviour of composite beams was demonstrated by comparing the numerically predicted results with experimental data. The proposed model can efficiently capture the global response (i.e. load vs deflection, slip, strain and stress) of the composite beams up to failure with adequate accuracy.