Variation in Tensile Strength of 3D Printed PLA Parts by Varying Infill Density and Infill Pattern

Garg, Siddharth; Sardar, Arshdeepsingh; Srivastava, Rahul; Verma, S. K.; Madan, A. K.

doi:10.36348/sjet.2023.v08i05.004

Saudi J. Eng. Technol.

2023

DOI: 10.36348/sjet.2023.v08i05.004

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Variation in Tensile Strength of 3D Printed PLA Parts by Varying Infill Density and Infill Pattern

Siddharth Garg¹,

Arshdeepsingh Sardar²,

Rahul Srivastava³

et al.

Abstract: 3D printing has emerged as a transformative technology that has revolutionized various industries and unlocked endless possibilities in the world of Research and Development. 3D printing allows the fabrication of three- dimensional parts from computerized designs by utilizing additive manufacturing technologies. Its importance stems from its capacity to expedite prototyping, speed up production, and stimulate innovation in industries including as healthcare, manufacturing and aerospace. The main objective of t… Show more

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Tailoring mechanical properties of FDM-3D-printed parts through titanium dioxide-reinforced resin filling technique

Eryildiz

2024

Proceedings of the Institution of Mechanical Engineers, Part B:

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Fused deposition modeling (FDM) is a type of additive manufacturing that falls under the category of material extrusion. Building an object using FDM involves layer-by-layer selective deposition of melted material along a predetermined path. However, FDM parts are inherently anisotropic, meaning their mechanical properties vary depending on the direction of loading, which makes them prone to failure under transverse loads. This study introduces a novel post-processing technique to enhance the mechanical properties of FDM parts. Unlike conventional FDM printing, this study explores a post-processing technique where TiO2-infused resin is injected into the internal voids of printed parts to reinforce their structure. Compared to unfilled counterparts, resin filled structures exhibited significant improvements in tensile strength (up to 40%) and impact energy (up to 28%). A 20% infill density was found to offer a cost-effective balance between material usage and performance, while 2% wt. TiO2 achieved the optimal balance between reinforcement and dispersion, exceeding the performance gains of other concentrations. SEM analysis confirmed effective TiO2 dispersion at lower concentrations, leading to smoother surfaces and potentially improved mechanical properties. This technique presents a promising approach for fabricating high-performance FDM parts with enhanced strength and toughness.

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Tailoring mechanical properties of FDM-3D-printed parts through titanium dioxide-reinforced resin filling technique

Eryildiz

2024

Proceedings of the Institution of Mechanical Engineers, Part B:

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A hybrid approach: Box–Behnken design and COPRAS on the investigation of biocompatible polylactic acid via material extrusion

Nirmal Kumar,

Raj Mohan,

Hareharen

et al. 2024

Proceedings of the Institution of Mechanical Engineers, Part E:

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This study investigates the performance of biocompatible polylactic acid (PLA) processed through material extrusion/fused filament fabrication (FFF). In this study, the significant FFF input parameters, such as layer deposition, infill angle (degree), and infill percentage (%), were designated to process the PLA based on the screening design experiments. Following Box–Behnken design (BBD), the different input conditions were analyzed to evaluate the performance by assessing the characteristics such as ultimate tensile strength (UTS) and relative density (RD). Printing speed (30 mm/s), nozzle temperature (200°C), and bed temperature (70°C) are considered as fixed input parameters. The novel combination of BBD approach with the Complex Proportional Assessment (COPRAS) technique was employed to obtain the appropriate input conditions. It was beneficial to attain the individual parameter's contribution to the PLA characteristics through analysis of variance and best alternative condition through degree of utility. The combined approach was validated with a composite desirability index “D.” Finally, the hybrid approach yielded better results, such as a maximum ultimate tensile strength (UTS) of 37.43 MPa, relative density (RD) 99.12%, and microhardness 52 HRB under the layer deposition: 0.12 mm, infill angle: 0°, and infill percentage: 100% in the printed biocompatible PLA.

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Variation in Tensile Strength of 3D Printed PLA Parts by Varying Infill Density and Infill Pattern

Cited by 2 publications

References 0 publications

Tailoring mechanical properties of FDM-3D-printed parts through titanium dioxide-reinforced resin filling technique

Tailoring mechanical properties of FDM-3D-printed parts through titanium dioxide-reinforced resin filling technique

A hybrid approach: Box–Behnken design and COPRAS on the investigation of biocompatible polylactic acid via material extrusion

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