Experimental investigation on mechanical characterization of 3D printed PLA produced by fused deposition modeling (FDM)

Mahmoud Moradi, Ahmad Aminzadeh, Davood Rahmatabadi, Alireza Hakimi

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Abstract

This study aims to systematically experimental investigate the influence of infill-patterns (IPs) on specific mechanical responses of parts fabricated by fused deposition modeling (FDM). A poly-lactic-acid (PLA) feedstock filament is utilized in the manufacturing process. Furthermore, six types of infill-patterns (deposition angle), namely full honeycomb, rectilinear, triangular, fast honeycomb, grid, and wiggle, are designed and printed. In order to determine the mechanical properties of manufactured parts, tensile tests are carried out. The mechanical properties such as extension, stress, elongation, energy, and Young's modulus are considered as objective functions. As a result, there is a direct correlation between mechanical properties and infill patterns. Thus, it is essential to select the best infill-pattern in terms of their applications, giving sufficient strength without overdoing time and cost. Based on the results, a triangular infill-pattern has a maximum value of ultimate tensile strength and E-module (15.4 and 534 MPa, respectively). On the other hand, the wiggle pattern is more flexible.

Original languageEnglish
Article number035304
Number of pages10
JournalMaterials Research Express
Volume8
Issue number3
DOIs
Publication statusPublished - 10 Mar 2021

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Keywords

  • fused deposition modeling
  • infill-pattern
  • poly-lactic-acid
  • tensile test
  • mechanical properties

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Metals and Alloys
  • Surfaces, Coatings and Films
  • Polymers and Plastics
  • Biomaterials

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