Effect of Layer Height on Tenile Strength of Fused Deposited Modeling Printed Carbon Poly-Lactic Acid Part

Fused deposition modelling (FDM) is an additive manufacturing process that creates objects by depositing successive layers of material. FDM is the most widely used additive manufacturing process because of its ability to create complex geometries. Various FDM process parameter affects the mechanical property of FDM objects. The main objective of this paper to stud the layer height of specimens, one of the important process parameter, build using Carbon poly-lactic acid part(C-PLA) with FDM process. For that Dogbone specimens as per ASTM D638-14 standard prepared using FDM process with three different layer height(h) of 0.12 mm, 0.23 mm and 0.35 mm. Three different sets of specimens with 0 0 ,450 , 900 raster orientation (θ) were printed using FDM process. Then specimens were tested on UTM machine to evaluate ultimate tensile strength for all specimens. Results show that high tensile strength found for lower layer height specimens compare to higher layer height specimens. Keywords: Fused deposition modeling, Tensile strength, Elastic modulus,PLA