The Relation Between the Friction of Lubricated Rough Surfaces and Apparent Normal Pressure

1989 ◽  
Vol 111 (2) ◽  
pp. 260-264 ◽  
Author(s):  
P. Lacey ◽  
A. A. Torrance ◽  
J. A. Fitzpatrick
Keyword(s):  
Surface Roughness ◽  
Friction Coefficient ◽  
Boundary Lubrication ◽  
Slip Line ◽  
Field Model ◽  
Rough Surfaces ◽  
Normal Pressure ◽  
Line Field ◽  
Slip Line Field ◽  
Asperity Contacts

Most previous studies of boundary lubrication have ignored the contribution of surface roughness to friction. However, recent work by Moalic et al. (1987) has shown that when asperity contacts can be modelled by a slip line field, there is a precise relation between the friction coefficient and the asperity slope. Here, it is shown that there is also a relation between the friction coefficient and the normal pressure for rough surfaces which can be predicted from a development of the slip line field model.

A slip-line field model of abrasive wear

Wear ◽  
1996 ◽  
Vol 196 (1-2) ◽  
pp. 35-45 ◽  
Author(s):  
A.A. Torrance ◽  
T.R. Buckley
Keyword(s):  
Abrasive Wear ◽  
Slip Line ◽  
Field Model ◽  
Line Field ◽  
Slip Line Field

scholarly journals Flow along Tool-Chip Interface in Orthogonal Metal Cutting

1966 ◽  
Vol 8 (1) ◽  
pp. 36-41 ◽  
Author(s):  
H. E. Enahoro ◽  
P. L. B. Oxley
Keyword(s):  
Steady State ◽  
Contact Zone ◽  
Slip Line ◽  
Metal Cutting ◽  
Field Model ◽  
The Body ◽  
Line Field ◽  
Slip Line Field ◽  
Chip Flow ◽  
Orthogonal Metal Cutting

In recent papers it has been suggested that over part of the tool-chip contact zone the chip does not slide but sticks to the tool, chip flow taking place by shear within the body of the chip. Sticking contact is inconsistent with steady state cutting and in this paper a slip-line field model of chip flow is presented which does not include sticking contact and which is consistent with the relevant experimental observations.

A Slip-Line Field Model for the Determination of Chip Curl Radius

1995 ◽  
Vol 117 (2) ◽  
pp. 266-271 ◽  
Author(s):  
X. D. Liu ◽  
L. C. Lee ◽  
K. Y. Lam
Keyword(s):  
Slip Line ◽  
Field Model ◽  
Elastic Recovery ◽  
Line Field ◽  
Slip Line Field

A slip-line field model is presented for the determination of the chip curl radius when cutting with a grooved restricted contact tool. The calculated values are found to provide a good approximation, especially for larger uncut chip thicknesses. The calculated results are consistently lower than the measured ones due to the elastic recovery of the chip after leaving the groove.

A Machining Program Employing a Slip Line Field Modelling Technique Over Other Constitutive Models

2020 ◽  
Vol 10 (2) ◽  
pp. 18-48
Author(s):  
Hridayjit Kalita ◽  
Kaushik Kumar
Keyword(s):  
Slip Line ◽  
Field Model ◽  
Plastic Material ◽  
Constitutive Models ◽  
Line Field ◽  
Slip Line Field ◽  
Stress Equilibrium ◽  
Common Technique ◽  
Trial And Error Method ◽  
Chip Separation

Machining involves complex plastic material flow at the chip separation site which makes it difficult to predict forces and other machining outputs to higher accuracy. Modelling is a common technique which facilitates incorporation of analytical and experimentally derived equations to visualize the process and analyses the mechanism. It saves time and machining factors can be optimized without any trial and error method. In this paper, the significance of slip line field model over other constitutive laws in defining the complex regions in machining are thoroughly reviewed and a slip line field model is chosen which incorporates build up edge (BUE) of a larger size than the other previously defined slip line models for machining. The modified model also incorporate a region of shear zone instead of a shear line, takes into account the chip curl effect and conform to the velocity discontinuity and stress equilibrium. The slip line fields are generated using MATLAB and employing Dewhurst-Collin's matrix technique.

scholarly journals Applicability of an orthogonal cutting slip-line field model for the microscale

2014 ◽  
Vol 229 (12) ◽  
pp. 2250-2264 ◽  
Author(s):  
Lara Rebaioli ◽  
Gabriele Biella ◽  
Massimiliano Annoni ◽  
J Rhett Mayor ◽  
Quirico Semeraro
Keyword(s):  
Slip Line ◽  
Field Model ◽  
Orthogonal Cutting ◽  
Line Field ◽  
Slip Line Field
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