Calculating Torque Friction Between Pipes with Contact Pressure

Click For Summary

Discussion Overview

The discussion revolves around calculating the torque friction between two pipes that are inserted into each other, focusing on the contact pressure and its implications for frictional torque. The context includes theoretical considerations and practical experimentation.

Discussion Character

  • Exploratory
  • Technical explanation
  • Experimental/applied

Main Points Raised

  • One participant describes a scenario involving two pipes with specific dimensions and a force acting on the external pipe, seeking to estimate the frictional torque.
  • Another participant inquires about the contact pressure between the pipes, suggesting that obtaining a figure for it could be a starting point for further calculations.
  • A repeated inquiry about the contact pressure indicates a focus on understanding this parameter better, with a suggestion to conduct experiments.
  • A participant proposes a formula for calculating contact pressure as Force/(diameter*length) and questions if this is applicable in their scenario.

Areas of Agreement / Disagreement

Participants appear to be exploring the same topic but have not reached a consensus on the contact pressure or its calculation. Multiple viewpoints and questions remain unresolved.

Contextual Notes

There are limitations regarding the assumptions made about the system, such as the uniformity of contact pressure and the specific conditions under which the pipes interact. The mathematical steps for calculating torque and contact pressure are not fully resolved.

Who May Find This Useful

This discussion may be useful for individuals interested in mechanical engineering, particularly those dealing with frictional forces in cylindrical systems or those conducting experiments related to torque and contact pressure.

sadanand08
Messages
3
Reaction score
0
I have two pipes inserted in each other .ID(internal pipe-PVC)=OD(external pipe-plastic)=50mm. They rub each other for 180 degree max in clockwise and anticlockwise direction, also slide by 80mm max (say in helical style). I wish to estimate the frictional torque consumed. I know the external cylinder has force in one direction @1000N acting at its center (at endcap).
 
Engineering news on Phys.org
What is the contact pressure between the pipes? You can at least get a figure to start with, although I would suggest you start experimenting a bit.
 
ank_gl said:
What is the contact pressure between the pipes? You can at least get a figure to start with, although I would suggest you start experimenting a bit.

How to submit the figure?
 
How to submit the figure? Contact pressure=Force/(diameter*length). Is it the same?
 

Similar threads

Pull-off force: hose, pipe, clamp
  • · Replies 5 ·
Replies
5
Views
2K
How is torque divided between multiple wheels in a system with friction?
  • · Replies 1 ·
Replies
1
Views
4K
Calculating Friction between Tapered Cylinders: A Math & Engineering Challenge
  • · Replies 5 ·
Replies
5
Views
3K
Undergrad Direction of friction on a rolling body
  • · Replies 2 ·
Replies
2
Views
1K
Calculating Friction Force and Bore Size for Robotic End of Arm Tooling
  • · Replies 7 ·
Replies
7
Views
2K
Calculate a torque from a pressure
  • · Replies 27 ·
Replies
27
Views
5K
Graduate Friction between two rotating cylinders
  • · Replies 7 ·
Replies
7
Views
10K