Purpose The purpose of this paper to study the tensile strength of the fused deposition modelling (FDM) printed PLA part. In recent times, FDM has been evolving from rapid prototyping to rapid manufacturing where parts fabricated by FDM process can be directly used for application. However, application of FDM fabricated part is significantly affected by poor and anisotropic mechanical properties. Mechanical properties of FDM part can be improved by proper selection of process parameters. Design/methodology/approach In the present study, three process parameter, namely, raster angle, layer height and raster width, have been selected to study their effect on tensile properties. Parts are fabricated as per ASTM D638 Type I standard. Findings It has been observed that the highest tensile strength obtained at 0° raster angle. Lower value of layer height is observed to be good for higher tensile strength because of higher bonding area between the layers. At higher value of raster width, tensile strength is improved up to certain extent after which presence of void reduces the tensile strength. Originality/value In the present investigation, layer height and raster width have been also varied along with raster angle to study their effect on the tensile strength of FDM printed PLA part.

No abstract

Fused deposition modeling is an additive manufacturing process in which successive layers of material are deposited to create a three-dimensional object. It is the most widely used additive manufacturing process because of its ability to make specimen having difficult geometrical shape. However, building end-user functional parts using fused deposition modeling proved to be a challenging task because of a wide variety of processing parameters. In the present paper, a detailed experimental study on open source 3D printer is reported to explore the effect of various fused deposition modeling process parameters viz. part orientation, infill density and infill pattern on tensile properties and modes of failure. Poly-lactic acid filament is used to make 3D specimens. The experimental values of tensile properties are measured and critically analysed. Failure modes under various tests are studied using scanning electron microscopy. Tensile test results indicate that part orientation, infill pattern and infill density significantly affect the tensile strength. It has been observed that parts printed with flat part orientation and concentric pattern exhibit maximum tensile strength. While tensile strength has been increasing with increment in infill density. From the SEM images, it has been found that one of the major causes of failure is weak strength within and between layers for the lower value of infill density.

No abstract

No abstract