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Extended Greenwood–Williamson Models for Rough Spheres

T. Zhao, Y. T. Feng, Yuntian Feng Orcid Logo

Journal of Applied Mechanics, Volume: 85, Issue: 10, Start page: 101007

Swansea University Author: Yuntian Feng Orcid Logo

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DOI (Published version): 10.1115/1.4040537

Abstract

The current work aims to develop two extended Greenwood–Williamson (GW) models for spherical particles with surface roughness which can be incorporated into the discrete element modeling (DEM) framework. The defects of the classic GW model when directly adopted in DEM are fully addressed and illustr...

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Published in: Journal of Applied Mechanics
ISSN: 0021-8936
Published: 2018
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URI: https://cronfa.swan.ac.uk/Record/cronfa40677
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first_indexed 2018-06-08T13:30:11Z
last_indexed 2018-08-14T18:52:56Z
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spelling 2018-08-14T15:37:34.3814763 v2 40677 2018-06-08 Extended Greenwood–Williamson Models for Rough Spheres d66794f9c1357969a5badf654f960275 0000-0002-6396-8698 Yuntian Feng Yuntian Feng true false 2018-06-08 CIVL The current work aims to develop two extended Greenwood–Williamson (GW) models for spherical particles with surface roughness which can be incorporated into the discrete element modeling (DEM) framework. The defects of the classic GW model when directly adopted in DEM are fully addressed and illustrated by both theoretical and numerical results. The first model, the extended elastic GW (E-GW) model, which evaluates the elastic deformation of the asperities and the bulk substrate separately is developed to consider the positive overlap involved in the contact problem. The capability of incorporating the extended elastic model into the DEM is illustrated by the comparison between the classic and extended models. The second model, the extended elasto–plastic GW (EP-GW) model, is further developed to consider the plastic deformation of the asperities which reduces the pressure increased by the surface roughness. Numerical comparisons between the E-GW and EP-GW models are also conducted to demonstrate the effect of the plastic deformation on the pressure and deformation distributions in the contact region. Journal Article Journal of Applied Mechanics 85 10 101007 0021-8936 31 12 2018 2018-12-31 10.1115/1.4040537 COLLEGE NANME Civil Engineering COLLEGE CODE CIVL Swansea University 2018-08-14T15:37:34.3814763 2018-06-08T08:51:29.5450988 Faculty of Science and Engineering School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering T. Zhao 1 Y. T. Feng 2 Yuntian Feng 0000-0002-6396-8698 3 0040677-08062018085303.pdf zhao2018(2).pdf 2018-06-08T08:53:03.2570000 Output 406861 application/pdf Accepted Manuscript true 2019-07-03T00:00:00.0000000 true eng
title Extended Greenwood–Williamson Models for Rough Spheres
spellingShingle Extended Greenwood–Williamson Models for Rough Spheres
Yuntian Feng
title_short Extended Greenwood–Williamson Models for Rough Spheres
title_full Extended Greenwood–Williamson Models for Rough Spheres
title_fullStr Extended Greenwood–Williamson Models for Rough Spheres
title_full_unstemmed Extended Greenwood–Williamson Models for Rough Spheres
title_sort Extended Greenwood–Williamson Models for Rough Spheres
author_id_str_mv d66794f9c1357969a5badf654f960275
author_id_fullname_str_mv d66794f9c1357969a5badf654f960275_***_Yuntian Feng
author Yuntian Feng
author2 T. Zhao
Y. T. Feng
Yuntian Feng
format Journal article
container_title Journal of Applied Mechanics
container_volume 85
container_issue 10
container_start_page 101007
publishDate 2018
institution Swansea University
issn 0021-8936
doi_str_mv 10.1115/1.4040537
college_str Faculty of Science and Engineering
hierarchytype
hierarchy_top_id facultyofscienceandengineering
hierarchy_top_title Faculty of Science and Engineering
hierarchy_parent_id facultyofscienceandengineering
hierarchy_parent_title Faculty of Science and Engineering
department_str School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering{{{_:::_}}}Faculty of Science and Engineering{{{_:::_}}}School of Aerospace, Civil, Electrical, General and Mechanical Engineering - Civil Engineering
document_store_str 1
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description The current work aims to develop two extended Greenwood–Williamson (GW) models for spherical particles with surface roughness which can be incorporated into the discrete element modeling (DEM) framework. The defects of the classic GW model when directly adopted in DEM are fully addressed and illustrated by both theoretical and numerical results. The first model, the extended elastic GW (E-GW) model, which evaluates the elastic deformation of the asperities and the bulk substrate separately is developed to consider the positive overlap involved in the contact problem. The capability of incorporating the extended elastic model into the DEM is illustrated by the comparison between the classic and extended models. The second model, the extended elasto–plastic GW (EP-GW) model, is further developed to consider the plastic deformation of the asperities which reduces the pressure increased by the surface roughness. Numerical comparisons between the E-GW and EP-GW models are also conducted to demonstrate the effect of the plastic deformation on the pressure and deformation distributions in the contact region.
published_date 2018-12-31T03:50:34Z
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score 10.928302