Effect of roughness and cinching on friction

  • Thread starter Tvail
  • Start date
  • Tags
    Friction
In summary, friction is a force that opposes motion between two surfaces in contact and understanding its effects is crucial for everyday activities and machine performance. The roughness of a surface can increase friction by creating a larger contact area and cinching can also increase friction by increasing the normal force. Different types of surfaces can also greatly affect friction, with smooth surfaces having lower coefficients of friction. The effects of roughness and cinching can be controlled and manipulated by altering surface roughness or adjusting cinching levels.
  • #1
Tvail
1
0

Homework Statement


I am trying to figure out what the friction coefficient is for a steel part that is forcefully pressed onto a steel ram. I know that normally the friction coefficient is around .7 for static steel on steel and .4 for kinetic steel on steel. Basically what I am trying to figure out is what amount of friction does the pinching of the part on the ram add.


Homework Equations



F=uN where F is friction force u is coefficient of friction N is normal force



The Attempt at a Solution



For Static movment: u=.7 and N=mg where m is the mass of the part 1.147*10^-3kg and g is gravity
the normal force was found to be .011Newtons and the friction force was found to be .009 Newtons which is lower than the normal force which means the part will fall off the ram, yet the part in my project remains on the ram.

any thoughts?
 
Physics news on Phys.org
  • #2


Hello!

Your calculations seem to be correct, and the result of the friction force being lower than the normal force does suggest that the part may potentially fall off the ram. However, there could be other factors at play that are keeping the part in place, such as the shape of the steel part and the ram, and any additional forces or pressure applied during the pressing process. It would be helpful to have more information about the specific setup and materials being used in order to accurately determine the friction coefficient in this scenario. Additionally, it may be helpful to conduct further experiments or simulations to better understand the forces at play and how they may affect the part's stability on the ram.
 

FAQ: Effect of roughness and cinching on friction

What is friction and why is it important to understand its effects?

Friction is a force that opposes the relative motion between two surfaces in contact. It is important to understand its effects because it plays a significant role in everyday life, from walking to driving, and it can also have a significant impact on the performance and efficiency of machines and equipment.

How does the roughness of a surface affect friction?

The roughness of a surface can greatly affect friction by increasing the contact area between two surfaces, which in turn increases the amount of force required to overcome the resistance and move the surfaces against each other. Rougher surfaces also tend to have more peaks and valleys, which can create more frictional forces.

3. What is the effect of cinching on friction?

Cinching, or tightening, a surface can increase the friction between two surfaces by creating a larger contact area and increasing the normal force acting between them. This can be useful in applications where a strong grip is desired, but it can also lead to increased wear and tear on the surfaces.

4. How do different types of surfaces affect friction?

Different types of surfaces can have vastly different effects on friction. For example, smooth surfaces tend to have lower coefficients of friction compared to rough surfaces. Additionally, the materials of the surfaces can also play a role, as some materials have stronger intermolecular forces that can increase friction.

5. Can the effects of roughness and cinching on friction be controlled or manipulated?

Yes, the effects of roughness and cinching on friction can be controlled and manipulated to a certain degree. For example, the surface roughness can be altered by polishing or using lubricants to reduce friction. Similarly, the amount of cinching can be adjusted to achieve a desired level of friction for a specific application.

Similar threads

Engineering Torque applied on a vise screw (problem includes friction)
Replies
9
Views
2K
Can the only reaction force (to gravity) be friction?
Replies
5
Views
2K
Answer: Calculate Clamping Force to Prevent Bar Rotation
Replies
9
Views
2K
I If frictional force in system is <= us*N then there is no slipping
Replies
7
Views
1K
Calculating Frictional Torque for a Centrifugal Brake System
Replies
2
Views
4K
Dynamics problem: determine maximum angle for equilibrium
Replies
20
Views
4K
Coefficient of friction between wrench jaws and cylinder
Replies
2
Views
3K
Friction problem of a block sandwiched between 2 surfaces
Replies
6
Views
649
Determine the max height for which there is no slipping
Replies
1
Views
3K
Coefficient of friction in regards to a clamp force
Replies
3
Views
4K

Hot Threads

Recent Insights

Back
Top