Grain flow for rough surfaces considering elastic/inelastic grain collision

Yeau Ren Jeng, Hung Jung Tsai

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationProceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
Pages1353-1360
Number of pages8
EditionPART B
Publication statusPublished - 2004 Dec 1
Event2004 ASME/STLE International Joint Tribology Conference - Long Beach, CA, United States
Duration: 2004 Oct 242004 Oct 27

Publication series

NameProceedings of the ASME/STLE International Joint Tribology Conference, IJTC 2004
NumberPART B

Conference

Conference2004 ASME/STLE International Joint Tribology Conference
Country/TerritoryUnited States
CityLong Beach, CA
Period04-10-2404-10-27

All Science Journal Classification (ASJC) codes

  • General Engineering

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