Dimensional shrinkage of cylindrical parts fabricated by fused deposition modeling

Heat shrinkage is a critical factor influencing the dimensional accuracy of FDM fabricated parts, full-factor experimental design method was adopted to investigate the influence of inner diameter, wall thickness and infill percentage on the inner diameter deviation of thin-walled cylindrical parts, and FDM experiments were carried out under the condition of five levels from each of factors in present study. Based on the measured data of the inner diameter deviation of the printed 125 samples, three dimensional scatter plots of the inner diameter deviation with respect to the structure parameters were drawn, and a statistical model for the inner diameter deviation of the printed cylindrical parts was established, of which the predicted values agree well with the measured values.