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Clip force

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Clip force

The clip force equation in
http://www.aavidthermalloy.com/products/maxclip/MaxClip_NA_5-4-05.pdf
does not make sense.

I decided to model the clip with the given width in Mechanica and
determine the clip force.
How do I go about determining the clip force?
Can I define a measure for the reaction force in one axis (normal to the
device being clamped) at the edge of line contact which is constrained
with a prescribed deflection in one axis while the other end, the mounting
end, is fixed?
Can anyone give specific steps?

Regards,
Cef
3 REPLIES 3

Re: Clip force

Cef

Apply your deflection as a prescribed displacement in the constraint
dialogue.

Then create a measure on that constraint for reaction.

You pretty much answered your own question!

Regards

David




> The clip force equation in
> http://www.aavidthermalloy.com/products/maxclip/MaxClip_NA_5-4-05.pdf
> does not make sense.
>
> I decided to model the clip with the given width in Mechanica and
> determine the clip force.
> How do I go about determining the clip force?
> Can I define a measure for the reaction force in one axis (normal to the
> device being clamped) at the edge of line contact which is constrained
> with a prescribed deflection in one axis while the other end, the mounting
> end, is fixed?
> Can anyone give specific steps?
>
> Regards,
> Cef
>
>
> ---
>
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>
> For assistance, email us at - or find other contacts
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> PTC/USER and the PTC/USER logo are registered trademarks of PTC/USER, Inc.
> Pro/ENGINEER is a registered trademark of PTC.
>
> Message authors are solely responsible for the content of their posts.
>



---
Mobile 07760 253644
Direct 01491 411369
Fax 0870 762 0655

Re: Clip force

And you may also want to think about using the large displacement analysis
function. If you clip is deflecting an appreciable distance WRT it's
thickness.

Look for the tick box in the analysis definition form and define multiple
load increments if you want.




> Cef
>
> Apply your deflection as a prescribed displacement in the constraint
> dialogue.
>
> Then create a measure on that constraint for reaction.
>
> You pretty much answered your own question!
>
> Regards
>
> David
>
>
>
>
>> The clip force equation in
>> http://www.aavidthermalloy.com/products/maxclip/MaxClip_NA_5-4-05.pdf
>> does not make sense.
>>
>> I decided to model the clip with the given width in Mechanica and
>> determine the clip force.
>> How do I go about determining the clip force?
>> Can I define a measure for the reaction force in one axis (normal to the
>> device being clamped) at the edge of line contact which is constrained
>> with a prescribed deflection in one axis while the other end, the
>> mounting
>> end, is fixed?
>> Can anyone give specific steps?
>>
>> Regards,
>> Cef
>>
>>
>> ---
>>
>> You are currently subscribed to sim.
>> To unsubscribe send a blank e-mail to
>> -.
>>
>> For assistance, email us at - or find other
>> contacts
>> at www.ptcuser.org/org/contacts.html.
>>
>> PTC/USER and the PTC/USER logo are registered trademarks of PTC/USER,
>> Inc.
>> Pro/ENGINEER is a registered trademark of PTC.
>>
>> Message authors are solely responsible for the content of their posts.
>>
>
>
>
> ---
> Mobile 07760 253644
> Direct 01491 411369
> Fax 0870 762 0655
>



---
Mobile 07760 253644
Direct 01491 411369
Fax 0870 762 0655

RE: Clip force

It's been awhile since I've done this but, I would think contact
analysis, careful with enforced displacement as you can get some error
as the path of the clip will not be straight, but, more likely a curve.
Watch your reactions on the model.



Make a block to enforce displacement on the clip, and use contacts
between them. You then can use a measure to find the force at the
displacement constraint. You may want to constrain the clip with
contacts also, and likely will require a couple of springs to fully
constrain the clip. Control the mesh so that you can get consistent
elements across from each other where you have contact.



Try a couple of methods, and compare results, let us know how it works
out best.



Erik Peterson

Sr. Product Engineer