Simple filling patterns to model mechanical behaviour of FDM's test pieces under torsion

This work presents how the finite element methodology has been applied to analyze the mechanical behaviour of PLA parts obtained by fused deposition with a 3D printer. Three different patterns of printed layers have been studied searching for the most accurate way to model the actual response of PLA parts in a torsion test. Nine different types of filaments have been used to make the torsion test specimens. Preliminary tasks to set up correctly the 3D printer as well as specific tensile tests carried out to know the elastic modulus of the PLA filaments are presented too. The conclusions are considered of interest to predict the mechanical behaviour of the pieces obtained by printing with fused deposition devices. (C) 2017 The Authors. Published by Elsevier B.V.