Determination of the intermolecular forces of attraction between macroscopic bodies for separations down to the contact point

1973 ◽  
Vol 77 (4) ◽  
pp. 501-515 ◽  
Author(s):  
A. I. Bailey ◽  
H. Daniels
Keyword(s):  
Contact Point ◽  
Intermolecular Forces

Rationalized approach to the determination of contact point in force-distance curves: Application to polymer brushes in salt solutions and in water

2010 ◽  
pp. NA-NA ◽  
Author(s):  
Kathryn A. Melzak ◽  
Susana Moreno-Flores ◽  
Kai Yu ◽  
Jayachandran Kizhakkedathu ◽  
José L. Toca-Herrera
Keyword(s):  
Polymer Brushes ◽  
Contact Point ◽  
Salt Solutions

Determination of the Instantaneous Radius of Curvature of a Cam at the Contact Point with a Flat Follower Moving Orthogonally

1994 ◽  
Vol 208 (2) ◽  
pp. 147-149 ◽  
Author(s):  
R Stone ◽  
H J Leonard
Keyword(s):  
Contact Point ◽  
Radius Of Curvature ◽  
Approximate Analysis

A means of calculating the exact radius of curvature is derived for a cam in contact with a flat follower. A comparison is then made with a widely used approximate analysis.

Application of the Theory of Envelope to the Determination of Camoid Profiles With Translating Followers

1992 ◽  
Author(s):  
Der Min Tsay ◽  
Guan Shyong Hwang
Keyword(s):  
Simple Procedure ◽  
Contact Point ◽  
Machining Process ◽  
Analytical Expression ◽  
Numerical Example ◽  
Pressure Angle ◽  
Independent Parameters

Abstract A new, simple procedure employing the theory of envelope for a family of surfaces with two independent parameters to determine the profiles of camoids with translating spherical followers is presented. Given the follower motion program, the method enables the camoid surface coordinates to be easily generated in an analytical expression. The results are then compared to those obtained by utilizing the principle of contact point between the camoid and the follower surfaces. The pressure angle is analyzed, and the cutter paths required in the machining process are also produced. A numerical example is given to illustrate the application of the approach.

THE INFLUENCE OF KINEMATIC CONDITIONS OF SLIDE/ROLL FRICTION ON THE WEAR OF PE-UHMW

Tribologia ◽  
2016 ◽  
Vol 265 (1) ◽  
pp. 35-43
Author(s):  
Piotr KOWALEWSKI ◽  
Filip WOŹNIAK
Keyword(s):  
Contact Point ◽  
Roll Motion ◽  
Linear Wear ◽  
Friction Couple ◽  
Kinematic Parameters ◽  
Steel Cylinder ◽  
Slip Ratio ◽  
Polymer Component ◽  
The Impact

The paper describes a study of steel 316L – polyethylene PE-UHMW friction couple during the slip-roll motion. The analysis is focused on the linear wear of polymer plates at various rolling-to-slip ratio values. Kinematic parameters of the friction nodes were angular velocity of the steel cylinder – ω, and the linear speed of the polymer plate – vp. In the experiment, the geometrical slip speeds were constant (s = 25 mm/s for each case). The constant geometrical slip speeds for different values of the plate speed (traverse of the contact point) vp allowed the determination of the influence of that parameter on the linear wear of the polymer component. The research showed the impact of plate speed (the contact point's traverse) vp on the values of the linear wear of the polyethylene, and the polymer's linear wear increase at the extreme ratios of the slip-roll motion (vp = 0, ω = 0).

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