DOE Based Parametric Study of Volumetric Change of FDM Parts

Investigation into the part accuracy in the Fused Deposition Modeling (FDM), which is one of the most successful Additive Manufacturing (AM) technologies and continues to dominate the world as one of the few processes suitable for manufacturing both prototypes and end products, has been carried out in this paper. Volumetric change and effect of “curl” type geometric inaccuracy on the parts made of Acrylonitrile Butadiene Styrene (ABS) specimens has been studied. A methodology has been developed to compensate for the errors of estimation of volumetric change errors by predicting the curl of the part. Design of experiments (DOE) is used in arriving at minimum number of experiments to be conducted and ANOVA is used in analyzing and arriving at the parametric equations. As per the DOE, the models have been manufactured and the volumetric change has been measured taking into account the effect of curl. Finally the parametric equation has been established that can help the designers in modeling multi objective optimization.