Determination of the dynamic coefficient of friction of sandy ground on a rigid wall

1995 ◽  
Vol 36 (4) ◽  
pp. 640-642
Author(s):  
N. N. Gerdyukov ◽  
A. G. Ioilev ◽  
S. A. Novikov
Keyword(s):  
Coefficient Of Friction ◽  
Rigid Wall ◽  
Dynamic Coefficient ◽  
Sandy Ground ◽  
Dynamic Coefficient Of Friction

scholarly journals Noise, vibration and harshness during dry clutch engagement oscillations

2020 ◽  
Vol 234 (23) ◽  
pp. 4572-4588
Author(s):  
I Minas ◽  
N Morris ◽  
S Theodossiades ◽  
M O’Mahony
Keyword(s):  
Coefficient Of Friction ◽  
Numerical Models ◽  
Dynamic Coefficient ◽  
Driving Experience ◽  
Clutch Engagement ◽  
Pin On Disc ◽  
Dry Clutch ◽  
Interacting Surfaces ◽  
Noise Vibration ◽  
Dynamic Coefficient Of Friction

Determining the root causes of various noise, vibration and harshness phenomena in modern automotive drivetrains is a critical task for industry, since noise, vibration and harshness issues often result in worsened driving experience. The aim of the current research is to investigate the dynamics during dry clutch engagement and the associated – often problematic – oscillations. This paper reports the development and partial validation of numerical models to study dry clutch behaviour. The models are used to investigate the influence of clutch and throttle actuation on the occurrence of unwanted clutch oscillations. The dynamic coefficient of friction between the clutch interacting surfaces was measured using a pin-on-disc rig under different slip speeds and contact pressure conditions, which are representative of a typical clutch engagement manoeuvre. The paper highlights the occurrence of instability issues in clutch dynamics (disc radial mode) as potential generators of aggressive noise, vibration and harshness, particularly during two different clutch pedal actuations. Such analysis has not hitherto been reported in the open literature.

Ti3SiC2 – A New High Temperature Solid Self-Lubricating Additive Agent

2013 ◽  
Vol 815 ◽  
pp. 626-631
Author(s):  
Li Xin Li ◽  
Xue Quan Liu ◽  
Cun Guang Ding ◽  
Yi Li ◽  
Fa Chang Li ◽  
...  
Keyword(s):  
High Temperature ◽  
Coefficient Of Friction ◽  
Dry Sliding ◽  
Dynamic Coefficient ◽  
Test Results ◽  
Tribological Test ◽  
Solid Additive ◽  
Lubricating Property ◽  
Pin On Disk ◽  
Dynamic Coefficient Of Friction

With the additive agent Ti3SiC2, the dry sliding behavior of Cr3C2-Ni and Cr3C2-Ni-Ti3SiC2 composites against GCr15 was investigated with a pin-on-disk tester at 400 °C in air under the load of 200N. Without Ti3SiC2, the dynamic coefficient of friction (COF) curves was fluctuated severely. After adding Ti3SiC2, the COF was decreased from 0.37 to 0.32, and the initial transition region of dynamic COF curve was shortened. These tribological test results showed that Ti3SiC2 was a new kind of solid additive agent with favorable high temperature self-lubricating property, and two possible mechanisms was proposed for its anti-friction ability.

scholarly journals The coefficient of friction of individual potatoes and various handling materials – Short communication

2012 ◽  
Vol 58 (No. 3) ◽  
pp. 114-117
Author(s):  
C.F.H. Bishop ◽  
A.F.J. Gash ◽  
C. Heslim ◽  
S. Hanney
Keyword(s):  
Mild Steel ◽  
Coefficient Of Friction ◽  
Coefficient Of Variation ◽  
Short Communication ◽  
Dynamic Coefficient ◽  
The Coefficient Of Friction ◽  
Dynamic Coefficient Of Friction

The dynamic coefficient of friction of single potatoes was determined on mild steel, rubber and plastic, for tubers in each of four conditions: dry and dirty, wet and dirty, clean and wet and clean and dry. Steel had the lowest overall mean coefficient of friction. The highest value was recorded for plastic, but this material also had the largest coefficient of variation. Overall, rubber was considered to be the most suitable all-condition material for tubers in a range of conditions.

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