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# Resultant Force Calc2

## Resultant Force Calc

(OP)
Hi,

It's been many years since I last used Mechanica and I've completely forgoten how or even if it is possible apply a fixed displacement to a part and get the resultant force from that displacement.

I know this must be possible as it seems like such a basic requirement which is faily simple to do in Cosmos.

Any help would be gratfully recieved as it would mean not having to go up into the attic and get out the traing manual!!!

### RE: Resultant Force Calc

Im not sure if prom will calculate the force that will cause the deformation.  However, you can add pressure to the area to the point of deformation and then you can calculate the force from there.

Good luck!

Tobalcane
"If you avoid failure, you also avoid success."

### RE: Resultant Force Calc

It can be done in ProMech, however you must use point constraints to do so.  When you are in the results viewer under the display type choose "model".  Then in the Quantity tab you will have a new drop down selection "Reactions at Point Constraints".  You will then have to choose your coordinate direction.  Kind of clunky, but it does work.

Also, you can't get reaction results if the point constraint is associated with a rigid link.  If your model is a 3D solid model you may have to use a small beam element that itself is rigidly linked to your constrain surface, but the other end of the beam has a point constraint.  There may be a better way out there, but this is all I can think of.

Good Luck,

Steve

### RE: Resultant Force Calc

(OP)
thanks guys I'll give it a go but might just end up exporting the part and using the package I'm more familiar with.

### RE: Resultant Force Calc

BTW for single value measures like this one (e.g. for a linear analysis) there is nothing to plot, so the Summary file is the correct place to look. But if you do a Design Study, you can plot is against design iteration. Oh, also if you use the older multipass adaptive convergence (MPA) then you can plot a measure against P-iteration....

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