Strength and Surface Characteristics of FDM-Based 3D Printed PLA Parts for Multiple Infill Design Patterns
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ORIGINAL CONTRIBUTION
Strength and Surface Characteristics of FDM-Based 3D Printed PLA Parts for Multiple Infill Design Patterns Pushpendra Yadav1 • Ankit Sahai1
•
Rahul Swarup Sharma1
Received: 19 May 2020 / Accepted: 2 October 2020 Ó The Institution of Engineers (India) 2020
Abstract Fused Deposition Modeling (FDM) based 3D printers are gaining popularity as cost-effective printers that are changing the life of millions with their capability to manufacture products in the fields of engineering, medical and education. This paper examines the variation in the compressive strength of FDM processed Polylactic acid (PLA) parts for different infill design patterns. The work is performed on 6 infill designs i.e., Hilbert curve, honeycomb, line, rectilinear, Archimedean curve and octagram spiral and compressive strengths are compared for infill densities varying from 20 till 80% in step of 20. It is observed that the Hilbert curve design exhibits maximum compressive strength of 121.35 MPa which is much higher than other designs rectilinear (78.88 MPa), line (73.84 MPa), honeycomb (62.56 MPa), Archimedean (70.07 MPa), octagram spiral (60.01 MPa). Also, with increase in infill density, compressive strength increases for all the considered infill design patterns. The fabricated parts are also investigated for surface roughness values for best 3 compression strengths with different combinations of infill densities. The surface roughness increases with increase in infill densities for rectilinear and hilbert curve but decreases for line pattern. Rectilinear pattern exhibits lowest roughness value as compared to hilbert curve and line design patterns. Keywords Fused deposition modeling 3D printing Compressive strength Surface roughness
& Ankit Sahai [email protected] 1
Additive Manufacturing Lab, Faculty of Engineering, Dayalbagh Educational Institute, Agra, India
Introduction Present world is witnessing the amazing technological growth in the field of Additive Manufacturing (AM) and 3D printing [1]. This field is gaining popularity not only in the area of manufacturing but also in biomedical [2], tissue engineering [3, 4], educational systems [5, 6], etc. Also, with customers demanding more and more customized products, manufacturing technologies are experiencing exponential shift in their designing of products and manufacturing in quick time with improved quality [7]. In comparison with numerous AM technologies that are available commercially i.e., selective laser melting (SLM), binder jetting (BJ), laminated object technology (LOM), selective laser sintering (SLS), fused-deposition modeling (FDM) and stereolithography (SLA), FDM is most popular and cost-effective technique to print 3D models and prototypes [8]. Through this technology, plastics such as polycarbonate (PC), polylactic acid (PLA), acrylonitrile butadiene styrene (ABS), PEEK and even nano-composites are used as raw materials for producing 3D printed products. Moreover for sustainable development in 3D Printing, researchers are using natural fib
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