한국분말재료학회지 (Journal of Powder Materials)

  • 제27권4호
  • /
  • Pages.318-324
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  • 2020
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  • 2799-8525(pISSN)
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  • 2799-8681(eISSN)
한국분말재료학회 (*구 분말야금학회) (The Korean Powder Metallurgy & Materials Institute)
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외연적 유한요소법을 이용한 적층제조 공정 중 응력 장 변화 계산

Computation of Stress Field During Additive Manufacturing by Explicit Finite Element Method

  • 양승용 (한국기술교육대학교 기계공학부) ;
  • 김정한 (한밭대학교 신소재공학과)
  • Yang, Seung-Yong (Korea University of Technology and Education, School of Mechanical Engineering) ;
  • Kim, Jeoung Han (Hanbat National University, Department of Materials Science and Engineering)
  • 투고 : 2020.08.07
  • 심사 : 2020.08.26
  • 발행 : 2020.08.28
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초록

In the present work, an explicit finite element analysis technique is introduced to analyze the thermal stress fields present in the additive manufacturing process. To this purpose, a finite element matrix formulation is derived from the equations of motion and continuity. The developed code, NET3D, is then applied to various sample problems including thermal stress development. The application of heat to an inclusion from an external source establishes an initial temperature from which heat flows to the surrounding body in the sample problems. The development of thermal stress due to the mismatch between the thermal strains is analyzed. As mass scaling can be used to shorten the computation time of explicit analysis, a mass scaling of 108 is employed here, which yields almost identical results to the quasi-static results.

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참고문헌

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