Imperial College London
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ProfessorCatherineO'Sullivan

Faculty of Engineering, Department of Civil and Environmental Engineering

Professor of Particulate Soil Mechanics
 
 
 
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Contact

 

+44 (0)20 7594 6117cath.osullivan Website

 
 
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Location

 

501Skempton BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Nadimi:2019:10.1007/s10035-019-0970-y,
author = {Nadimi, S and Otsubo, M and Fonseca, J and O'Sullivan, C},
doi = {10.1007/s10035-019-0970-y},
journal = {Soils and Foundations},
title = {Numerical modelling of rough particle contacts subject to normal and tangential loading},
url = {http://dx.doi.org/10.1007/s10035-019-0970-y},
volume = {21},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Our  understanding of  the  mechanics  of  contact behaviour for  interacting  particles  has been developed mostly assumingthat surfaces are smooth.  However,real particlesof interest inengineering  science  are  generally  rough.   While  recent studies  have considered  the  influence  of  roughness  on  the normal force-displacement  relationship, surface roughness was quantified using only a single scalar measure, disregardingthe topology of the surface.  There are some conflicting arguments concerning the effect of roughness  on  the  tangential  or  shear  force-displacement  relationship.    In  this  study,optical interferometry data are used to generate the surface topology for input into a 3D finite element model. This model is used to investigate the sensitivity of the normal force-displacement  response to  thesurfacetopology  by  considering differentsurfaces with similar  overall  roughness  values. The effect  of  surface  roughness  on  the  tangential force-displacement relationshipand the  influence  of  loading  history are also explored.  The  results  indicate  that  quantifying  roughness  using  a  single  value,  such  as  the  root mean square height of roughness, Sq, is insufficient to predict the effect of roughness upon stiffness. It is also shown that in the absenceof interlocking,rough particle surfaces exhibit a lower frictional resistance in comparison with equivalent smooth surfaces.
AU  - Nadimi,S
AU  - Otsubo,M
AU  - Fonseca,J
AU  - O'Sullivan,C
DO  - 10.1007/s10035-019-0970-y
PY  - 2019///
SN  - 0038-0806
TI  - Numerical modelling of rough particle contacts subject to normal and tangential loading
T2  - Soils and Foundations
UR  - http://dx.doi.org/10.1007/s10035-019-0970-y
UR  - http://hdl.handle.net/10044/1/74367
VL  - 21
ER  -
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