Journal of the Korean Society of Manufacturing Process Engineers (한국기계가공학회지)

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
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Comparison of Mechanical Properties and Form Accuracy in FDM 3D Printing Based on Building Conditions

FDM 방식 3D 프린팅에서 제작 조건에 따른 기계적물성치와 형상정밀도의 실험적 비교

  • Kim, Gi-Dae (Faculty of Mechanical and Automotive Engineering, Daegu Catholic Univ.)
  • 김기대 (대구가톨릭대학교 기계자동차공학부)
  • Received : 2021.05.01
  • Accepted : 2021.07.11
  • Published : 2021.08.31
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Abstract

In this study, we experimentally evaluated the mechanical properties and geometric form accuracy in FDM 3D printing processes based on the printing direction, building direction, and layer thickness. The specimen test results showed that the tensile strength increased by over 33% in the printing direction compared to the direction perpendicular to printing and the tensile strength becomes larger as the layer thickness decreased. Furthermore, the tensile and impact strengths in the building direction were significantly reduced due to the difference in the interlayer joining and bonding strengths of the fused material. Additionally, shrinkage of the material due to phase change induced curl distortion especially in thin and long 3D-printed products, which increased as the layer thickness increased.

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References

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