The Elastic Behaviour of Sintered Metallic Fibre Networks: A Finite Element Study by Beam Theory

BACKGROUND: The finite element method has complimented research in the field of network mechanics in the past years in numerous studies about various materials. Numerical predictions and the planning efficiency of experimental procedures are two of the motivational aspects for these numerical studies. The widespread availability of high performance computing facilities has been the enabler for the simulation of sufficiently large systems. OBJECTIVES AND MOTIVATION: In the present study, finite element models were built for sintered, metallic fibre networks and validated by previously published experimental stiffness measurements. The validated models were the basis for predictions about so far unknown properties. MATERIALS AND METHODS: The finite element models were built by transferring previously published skeletons of fibre networks into finite element models. Beam theory was applied as simplification method. RESULTS AND CONCLUSIONS: The obtained material stiffness isn’t a constant but rather a function of variables such as sample size and boundary conditions. Beam theory offers an efficient finite element method for the simulated fibre networks. The experimental results can be approximated by the simulated systems. Two worthwhile aspects for future work will be the influence of size and shape and the mechanical interaction with matrix materials.