Effect of surface contact conditions on the stick–slip behavior of brake friction material

Wear ◽  
2012 ◽  
Vol 294-295 ◽  
pp. 305-312 ◽  
Author(s):  
S.W. Yoon ◽  
M.W. Shin ◽  
W.G. Lee ◽  
H. Jang
Keyword(s):  
Friction Material ◽  
Stick Slip ◽  
Contact Conditions ◽  
Surface Contact ◽  
Effect Of Surface ◽  
Brake Friction Material

A Modified Thromboplastin Screening Test

1961 ◽  
Vol 06 (03) ◽  
pp. 492-497 ◽  
Author(s):  
Janet C. Macpherson ◽  
R. M Hardisty
Keyword(s):  
Standard Method ◽  
Comparative Studies ◽  
Screening Test ◽  
Incubation Mixture ◽  
Surface Contact ◽  
Modified Test ◽  
Effect Of Surface

SummaryA modification of the thromboplastin screening test of Hicks and Pitney is described, in which the effect of surface contact on the test plasma is controlled by the addition of a suspension of kaolin to the incubation mixture before recalcification.Comparative studies show the modified test to give more reproducible results than the standard method.

Compositional effects of the brake friction material on creep groan phenomena

Wear ◽  
2001 ◽  
Vol 251 (1-12) ◽  
pp. 1477-1483 ◽  
Author(s):  
H. Jang ◽  
J.S. Lee ◽  
J.W. Fash
Keyword(s):  
Friction Material ◽  
Compositional Effects ◽  
Brake Friction Material

Performance of Non Asbestos Disc Brake Friction Material for Automotive Application - An Experimental Case Study

2010 ◽  
Author(s):  
Pradnya Eknath Kosbe ◽  
Niteen Sahasrabudhe ◽  
Rahul Khandagale ◽  
Rajendra Kulkarni
Keyword(s):  
Friction Material ◽  
Automotive Application ◽  
Disc Brake ◽  
Brake Friction Material

Lubrication of Rough Surfaces by a Boundary Film-Forming Viscosity Modifier Additive

2005 ◽  
Vol 127 (1) ◽  
pp. 223-229 ◽  
Author(s):  
R. P. Glovnea ◽  
A. V. Olver ◽  
H. A. Spikes
Keyword(s):  
Rough Surface ◽  
Rough Surfaces ◽  
Viscosity Index ◽  
Functionalized Polymers ◽  
Contact Conditions ◽  
Film Forming ◽  
Boundary Film ◽  
Surface Contact ◽  
Lubricated Contact ◽  
Rough Surface Contact

In previous work it was shown that some functionalized polymers used as viscosity index improvers are able to form thick boundary lubricating films. This behavior results from adsorption of the polymer on metal surfaces to form a layer of enhanced viscosity adjacent to the surface. In the current work the behavior of one such polymer in rough surface contact conditions is studied, using both model and real rough surfaces. It is found that the polymer is able to form a thick boundary film in rough surface contact, just as it does with smooth surfaces. It is also shown that the effect of this boundary film is to significantly reduce friction in rolling-sliding, rough surface, lubricated contact.

scholarly journals Simulated Nanoscale Peeling Process of Monolayer Graphene Sheet: Effect of Edge Structure and Lifting Position

2010 ◽  
Vol 2010 ◽  
pp. 1-12 ◽  
Author(s):  
Naruo Sasaki ◽  
Hideaki Okamoto ◽  
Shingen Masuda ◽  
Kouji Miura ◽  
Noriaki Itamura
Keyword(s):  
Graphene Sheet ◽  
Atomic Scale ◽  
Monolayer Graphene ◽  
Lattice Period ◽  
Force Curve ◽  
Stick Slip ◽  
Edge Structure ◽  
Sliding Motion ◽  
Peeling Process ◽  
Surface Contact

The nanoscale peeling of the graphene sheet on the graphite surface is numerically studied by molecular mechanics simulation. For center-lifting case, the successive partial peelings of the graphene around the lifting center appear as discrete jumps in the force curve, which induce the arched deformation of the graphene sheet. For edge-lifting case, marked atomic-scale friction of the graphene sheet during the nanoscale peeling process is found. During the surface contact, the graphene sheet takes the atomic-scale sliding motion. The period of the peeling force curve during the surface contact decreases to the lattice period of the graphite. During the line contact, the graphene sheet also takes the stick-slip sliding motion. These findings indicate the possibility of not only the direct observation of the atomic-scale friction of the graphene sheet at the tip/surface interface but also the identification of the lattice orientation and the edge structure of the graphene sheet.

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