Learning Forum

[Hakim Dina Anjum]

I want to determine the grip force of the U shaped clamp on the rectangular block after I insert it, to understand whether the clamp is tight enough. The force reaction are the results of the lower surface of the block after I inserted and retained it. How can I understand the grip force from it?

[Sampat Kumar]

 

Hi  Hakim, 
The reaction force indicates how much force you have applied to the clamped body. To calculate this, you can apply the pull force to the clamped body and then see how much displacement and deformation is permissible according to your analysis, the Reaction force developed between the clamped part would be your grip force for the analysis.  

Regards,
Sampat

 

 

 

 

[bla bling]

That's right. You can apply a pull on the clamped body and then see the allowable displacement and deformation according to your analysis, The reaction force generated between the clamped part will be your clamping force for analysis .

connect 4

[Hakim Dina Anjum]

How is it different from using a displacement boundary condition on the clamped body like I did here? The second half of the graph is during the "pull" operation. Except that I used a displacement boundary condition to represent the pull or retention, not force.

[Sampat Kumar]

Hi Hakim,
You can apply displacement, but you should remember that you are trying to displace the body from one point to another. You can apply the force reaction on the face of the bock where the displacement is applied to see the force required to pull the clamped body. In this case, you will have two friction forces: one static and the other kinetic. You can determine your grip forces by analysing static, limiting, and kinetic friction as compared to the applied force for your particular analysis. you can adjust your grip forces according to the pull force. 

Regards, 
Sampat