Abstract
This paper considers the mechanical interaction due to surface roughness and examines the surface theories using the classical definition of coefficient of friction: the tangential-to-normal load ratio. The postulation for maximum static friction is used to experimentally evaluate the contact models. For this purpose, a pin-on-disk test apparatus is employed with the capability of measuring tangential and normal forces for a frictional contact. The tests involve pairs of disks and specimens, that is, steel-on-steel and aluminum-on-aluminum contacts. In each case, profilometer measurements are performed on the disk and the Greenwood and Williamson parameters, are determined. Using the parameters, the theoretical estimates of normal and tangential loads are obtained. The theoretical values of tangential-to-normal contact load ratios are compared with those obtained from measurements for various applied normal loads. The tests utilizing a pin-on-disk apparatus showed a partial agreement between the experimentally obtained load ratios and the predicted upper limit confidence interval using the theoretical elastic and elastic-plastic contact. The result suggested that the elastic-plastic formulations provide better predictions of load ratios than the elastic contact formulations.
| Original language | English |
|---|---|
| Pages (from-to) | 389-403 |
| Number of pages | 15 |
| Journal | Tribology Transactions |
| Volume | 48 |
| Issue number | 3 |
| DOIs | |
| Publication status | Published - Jul 2005 |
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Keywords
- Contacting rough surfaces
- Friction-modeling
- Static friction
ASJC Scopus subject areas
- Mechanical Engineering
Cite this
Experimental technique to study tangential-to-normal contact load ratio. / Abdo, Jamil A.
In: Tribology Transactions, Vol. 48, No. 3, 07.2005, p. 389-403.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Experimental technique to study tangential-to-normal contact load ratio
AU - Abdo, Jamil A.
PY - 2005/7
Y1 - 2005/7
N2 - This paper considers the mechanical interaction due to surface roughness and examines the surface theories using the classical definition of coefficient of friction: the tangential-to-normal load ratio. The postulation for maximum static friction is used to experimentally evaluate the contact models. For this purpose, a pin-on-disk test apparatus is employed with the capability of measuring tangential and normal forces for a frictional contact. The tests involve pairs of disks and specimens, that is, steel-on-steel and aluminum-on-aluminum contacts. In each case, profilometer measurements are performed on the disk and the Greenwood and Williamson parameters, are determined. Using the parameters, the theoretical estimates of normal and tangential loads are obtained. The theoretical values of tangential-to-normal contact load ratios are compared with those obtained from measurements for various applied normal loads. The tests utilizing a pin-on-disk apparatus showed a partial agreement between the experimentally obtained load ratios and the predicted upper limit confidence interval using the theoretical elastic and elastic-plastic contact. The result suggested that the elastic-plastic formulations provide better predictions of load ratios than the elastic contact formulations.
AB - This paper considers the mechanical interaction due to surface roughness and examines the surface theories using the classical definition of coefficient of friction: the tangential-to-normal load ratio. The postulation for maximum static friction is used to experimentally evaluate the contact models. For this purpose, a pin-on-disk test apparatus is employed with the capability of measuring tangential and normal forces for a frictional contact. The tests involve pairs of disks and specimens, that is, steel-on-steel and aluminum-on-aluminum contacts. In each case, profilometer measurements are performed on the disk and the Greenwood and Williamson parameters, are determined. Using the parameters, the theoretical estimates of normal and tangential loads are obtained. The theoretical values of tangential-to-normal contact load ratios are compared with those obtained from measurements for various applied normal loads. The tests utilizing a pin-on-disk apparatus showed a partial agreement between the experimentally obtained load ratios and the predicted upper limit confidence interval using the theoretical elastic and elastic-plastic contact. The result suggested that the elastic-plastic formulations provide better predictions of load ratios than the elastic contact formulations.
KW - Contacting rough surfaces
KW - Friction-modeling
KW - Static friction
UR - http://www.scopus.com/inward/record.url?scp=27144506233&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=27144506233&partnerID=8YFLogxK
U2 - 10.1080/05698190500225334
DO - 10.1080/05698190500225334
M3 - Article
VL - 48
SP - 389
EP - 403
JO - Tribology Transactions
JF - Tribology Transactions
SN - 1040-2004
IS - 3
ER -