A finite element model to predict the part strength of fused deposition modeling printed parts

This paper aims at creating a computational finite element model, which will be used for prediction of deformation and failure of specimen under static loads for specimens prepared using FDM based 3D printers with different raster fill patterns and density. The work is divided as follows: a) understanding heterogeneity in specimen printed using FDM; b) conducting strength testing experiments to estimate stiffness and failure corresponding to particular infill configuration; c) creating and validating computational finite element model of FDM printed specimen with various raster fill pattern and density. In this work, the computational model of FDM parts is created as a multilayered composite model. The computational model generated in this work can be used to estimate the deformation of a specimen printed using FDM process under a specific load condition. This model can further be used within an optimization framework to maximize part strength for a part with any geometry by suitably selecting part orientation and slicing parameters for a given service load condition.