Structure and Fracture Visualization of Tilted ABS Specimens Processed via Fused Filament Fabrication Additive Manufacturing

  • D. Richkov School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel
  • Y. Rosenthal School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel
  • D. Ashkenazi School of Mechanical Engineering, Tel Aviv University, Ramat Aviv 6997801, Israel https://orcid.org/0000-0001-5871-1903
  • A. Stern School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel & Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel https://orcid.org/0000-0002-8980-9214
Keywords: ABS polymer, Additive Manufacturing, Fused Filament Fabrication, mechanical properties, three-point bend test, fractography, fracture visualization

Abstract

Fused filament fabrication (FFF) technique is one of the most frequently used additive manufacturing (AM) technologies for printing ABS and many other thermoplastic materials. The anisotropy of the mechanical properties of 3D-printed parts manufactured by FFF technology is still of major concern when using this technique. Thus, the component’s orientation, build strategy and printing parameters affect the mechanical properties, and failure mechanisms are of crucial importance. This research aims to partly fill this gap by studying the structure and mechanical behavior of FFF-ABS specimens, and by performing fracture surface analysis by the three-point bend flexural test. A series of tests were conducted to determine the flexural properties of tilted specimens at 0°, 15°, 30°, 45°, 60° and 75° inclination angles relative to the machine platform. The work describes manufacture method of the specimens, experimental procedures, and outcomes from the mechanical and structural characterizations of the FFF-ABS specimens. Overall, two main failure modes were observed for the tested specimens: (1) inter-layer/ inter-raster bond failure (typical for upright specimens) and (2) intra-layer/trans-raster failure (typical for on-edge specimens). A mixed inter-layer/ intra-layer mode was found for the specimens tilted in-between the 15o and 60o range.

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Author Biographies

Y. Rosenthal, School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel

School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel

A. Stern, School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel & Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel

School of Mechanical Engineering, Afeka Academic College of Engineering, Tel Aviv, 69107, Israel & Department of Materials Engineering, Ben-Gurion University of the Negev, Beer Sheva 8410501, Israel

Published
2021-12-31
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