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

The Korean Society of Manufacturing Process Engineers (한국기계가공학회)
권호 표지
DOI QR코드

DOI QR Code

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

높은 세장비를 가진 침상형 입자의 동적 거동 해석을 위한 중첩형 강체막대모델을 이용한 이산요소법

  • 김영호 ((주) 울산알루미늄 주조설비관리팀) ;
  • 박준영 (금오공과대학교 기계설계공학과)
  • Received : 2018.04.17
  • Accepted : 2018.05.01
  • Published : 2018.06.30
Download PDF
⟨ Previous Next ⟩

Abstract

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.

Keywords

References

  1. Lee, Y. C., Shin, G. H., Kwak, T. S., "Deburring Technology of Vacuum Plate for MLCC Lamination Using Magnetic Abrasive Polishing and ELID Process," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 14, No. 3, pp. 149-154, 2015. https://doi.org/10.14775/ksmpe.2015.14.3.149
  2. Lee, Y. C., Kim, K. S., Kwak, T. S., Lee, J. R., "An Experimental Study on Magnetic Assisted Polishing of Polycarbonate Plate for Recycling," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 12, No. 3, pp. 1-6, 2013. https://doi.org/10.14775/ksmpe.2013.12.6.001
  3. Son, C. B., Ryu, M. H., Kwak, J. S., "Determination of Curvature Radius of Magnetic Tool Using Weighted Magnetic Flux Density in Magnetic Abrasive Polishing," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 12, No. 3, pp. 69-75, 2013. https://doi.org/10.14775/ksmpe.2013.12.6.069
  4. Kwak, T. S., Kwak, J. S., "Magnetic Abrasive Polishing Technology with Ceramic Particles," Journal of the Korean Society for Precision Engineering, Vol. 30, No. 12, pp. 1253-1258, 2013. https://doi.org/10.7736/KSPE.2013.30.12.1253
  5. Chung, S. K., Introductory for Shot Peening Process, Sehwa Publication, pp.123-160, 2001.
  6. Kang, S. H., Lyu, P.J., Park, J., Choi, H. K., Powder Process Engineering, pp.1-20, 2012.
  7. Choi, D. M., Park, J., "Discrete element method for predicting the coverage at shot peening processing," Fall Conference of the Korean Society of Manufacturing Process Engineers, Vol. 1, pp. 41-41, 2014.
  8. Cundall, P. A., Strack, O. D. L., "A discrete numerical model for granular assemblies," Geotechnique, Vol. 29, No. 1, pp. 47-65, 1979. https://doi.org/10.1680/geot.1979.29.1.47
  9. Ahn, S. h., Park, J., "A New Rigid Rod Model for the Discrete Element Method to Analyze the Dynamic Behavior of Needle-shaped Powder," Journal of the Korean Society of Manufacturing Process Engineers, Vol. 16, No. 2, pp. 149-154, 2017. https://doi.org/10.14775/ksmpe.2017.16.2.0149
  10. Park, J., "Modelling the Dynamics of Fabric in a Horizontal Drum," Doctoral disssertation, Purdue University, U.S., 2003.
  11. Park, J., Kang, N., "Applications of fiber models based on discrete element method to string vibration," Journal of Mechanical Science and Technology, Vol. 23, pp. 372-380, 2009. https://doi.org/10.1007/s12206-008-0921-8

Cited by

  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