Previous work by this group on an average lubrication equation for grain flow with roughness effects is extended to include grain-grain collision elasticity ranging from perfectly elastic to perfectly inelastic. The average lubrication equation is based on Haff’s grain flow theory, with flow factors from Patir and Cheng and Tripp’s use of perturbation. The derived flow factors are obtained as functions of rough surface characteristics, grain size and collision pattern. As collision energy loss approaches zero, the inelastic results approach those for perfectly elastic grain collision. The mathematical formulae for flow factors, grain/grain collision elasticity, grain size and roughness are presented, discussed. Predictions for the elastic and inelastic cases are graphically demonstrated and compared.
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ASME/STLE 2004 International Joint Tribology Conference
October 24–27, 2004
Long Beach, California, USA
Conference Sponsors:
- Tribology Division
ISBN:
0-7918-4181-2
PROCEEDINGS PAPER
Grain Flow for Rough Surfaces Considering Elastic/Inelastic Grain Collision
Yeau-Ren Jeng,
Yeau-Ren Jeng
National Chung Cheng University, Chia-Yi, Taiwan
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Hung-Jung Tsai
Hung-Jung Tsai
WuFeng Institute of Technology, Chia-Yi, Taiwan
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Yeau-Ren Jeng
National Chung Cheng University, Chia-Yi, Taiwan
Hung-Jung Tsai
WuFeng Institute of Technology, Chia-Yi, Taiwan
Paper No:
TRIB2004-64296, pp. 1373-1380; 8 pages
Published Online:
December 22, 2008
Citation
Jeng, Y, & Tsai, H. "Grain Flow for Rough Surfaces Considering Elastic/Inelastic Grain Collision." Proceedings of the ASME/STLE 2004 International Joint Tribology Conference. ASME/STLE 2004 International Joint Tribology Conference, Parts A and B. Long Beach, California, USA. October 24–27, 2004. pp. 1373-1380. ASME. https://doi.org/10.1115/TRIB2004-64296
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