Effect of local enhanced slicing on the bending strength of 3D printed FDM models
In order to improve the bending strength and specific strength of fused deposition(FDM)3D printed models,the central area of polylactic acid(PLA)specimens through the local enhancement slicing function of the Cura software was rein-forced,and 8 groups of specimens(including 0#reference group and 1#-7#enhanced group)were fabricated using the FDM process,and three-point bending experiments were carried out on the groups of specimens to compare the bending strength and specific strength of the PLA specimens under different enhancement slicing parameters.The results show that when the bending strength of PLA specimens increases and then decreases with the increase of local enhanced filling density;the bending strength of PLA speci-mens increases gradually with the increase of local enhanced filling alignment multiplier;the bending strength of PLA specimens increases gradually with the increase of local enhanced extrusion rate;the specific strengths of PLA specimens in the three modes of local enhanced filling density of 60%,local enhanced filling alignment multiplier of 3,and local enhanced extrusion rate of 120%are increased by 16%,13%,and 5%,respectively,compared to that in the reference group of 0#,and the specific strengths increas-es in the modes of local enhanced filling density have been increased the most effectively.Therefore,for the FDM model with conventional slicing parameters of 20%filling density,1 filling alignment multiplier,and 100%extrusion rate,setting the filling density of locally enhanced areas to 60%can effectively improve its bending strength and specific strength.
local enhanced slicingfused deposition modelbending strength
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