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

  • 제17권3호
  • /
  • Pages.22-27
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  • 2018
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  • 1598-6721(pISSN)
  • /
  • 2288-0771(eISSN)
한국기계가공학회 (The Korean Society of Manufacturing Process Engineers)
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높은 세장비를 가진 침상형 입자의 동적 거동 해석을 위한 중첩형 강체막대모델을 이용한 이산요소법

Discrete Element Method using the Superposed Rigid-Rod Model for the Dynamic Behavior of Needle-Shaped Powder with a High Aspect Ratio

  • 김영호 ((주) 울산알루미늄 주조설비관리팀) ;
  • 박준영 (금오공과대학교 기계설계공학과)
  • 투고 : 2018.04.17
  • 심사 : 2018.05.01
  • 발행 : 2018.06.30
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초록

One problem of the Discrete Element Method is the assumption of a spherical particle shape, which reduces the computing time but significantly limits the application of the DEM to analysis. This limitation can be overcome by a recently developed rigid-rod model. However, the rigid-rod model has an essential problem related with friction: it always contains friction error because of the bumpy surface. To overcome this issue, we suggest a superposed rigid-rod model in this paper. The superposed rigid-rod model is notably consistent with the theoretical value in terms of the velocity and angular velocity after the collision. The estimated error is negligible(less than 2%). Then, the developed model is applied to hopper discharging. The developed model shows no problem in the discharging flow from the hopper.

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참고문헌

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피인용 문헌

  1. Discrete Element Method of the Dynamic Behavior of Flaky Particles Using the Rigid Plate Model vol.2, pp.1, 2020, https://doi.org/10.1007/s42493-020-00036-3
  2. 분말에서 발생하는 Washboarding 현상에 대한 이산요소법을 이용한 수치해석적 연구 vol.19, pp.4, 2018, https://doi.org/10.14775/ksmpe.2020.19.04.093