Imperial College London
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Professor Norbert Hoffmann

Faculty of Engineering, Department of Mechanical Engineering

Visiting Professor
 
 
 
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Contact

 

n.hoffmann

 
 
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Location

 

557City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Papangelo:2017:10.1038/s41598-017-07234-4,
author = {Papangelo, A and Hoffmann, N and Ciavarella, M},
doi = {10.1038/s41598-017-07234-4},
journal = {Scientific Reports},
title = {Load-separation curves for the contact of self-affine rough surfaces.},
url = {http://dx.doi.org/10.1038/s41598-017-07234-4},
volume = {7},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - There are two main approximate theories in the contact of rough solids: Greenwood-Williamson asperity theories (GW) and Persson theories. Neither of them has been fully assessed so far with respect to load-separation curves. Focusing on the most important case of low fractal dimension (D f  = 2.2) with extensive numerical studies we find that: (i) Persson's theory describes well the regime of intermediate pressures/contact area, but requires significant corrective factors: the latter depend also on upper wavevector cutoff of the roughness; hence, (ii) Persson's theory does not predict the correct functional dependence on magnification; (iii) asperity theories in the discrete version even neglecting interaction effects are more appropriate in the range of relatively large separations, also to take into consideration of the large scatter in actual realization of the surface.
AU  - Papangelo,A
AU  - Hoffmann,N
AU  - Ciavarella,M
DO  - 10.1038/s41598-017-07234-4
PY  - 2017///
SN  - 2045-2322
TI  - Load-separation curves for the contact of self-affine rough surfaces.
T2  - Scientific Reports
UR  - http://dx.doi.org/10.1038/s41598-017-07234-4
UR  - https://www.ncbi.nlm.nih.gov/pubmed/28761122
UR  - http://hdl.handle.net/10044/1/51947
VL  - 7
ER  -
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