applying load at center of gravity using inventor pro 2014

[Anonymous]

I am trying to apply a load lengthwise on a 2 x 2 x 3/16 angle at the center of gravity using "stress analysis" in inventor pro 2014, but it won't let me apply the load at this point.  Is there something I am doing wrong.  I know that the load would be floating in the air at the center of gravity, could this be the issue?

Thanks,

Inventor user

[CCarreiras]

Hi!!

Its better to post some image or the part to understant your issue.

Regards.

[Anonymous]

Here is a picture of my problem. (see attached)

[JDMather]

The yellow arrow glyph is just an image - the load is distributed evenly across the face selected.
(I assume you did select the face and not the edge or midpoint.)

[Anonymous]

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@Anonymous wrote:

The yellow arrow glyph is just an image - the load is distributed evenly across the face selected.

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I don't run simulations all the time, but this post cleared up a few questions I had the few times I did run a test.

Thanks JD!

[cwhetten]

I believe you want a body load.  A body load applies a linear acceleration to the entire model volume, and this is equivalent to applying a load at the center of gravity.  You have to specify an acceleration, rather than a force, but if you know your force and the mass of your part, you can find the effective acceleration:

acceleration = Force / mass (credit to Isaac Newton)

You could also use the Gravity load, as this is just a specialized body load.

You may also be able to use a Remote Force load and specify the location of the force to be at your COG, but I don't know how this would behave if your COG is outside of the model volume.

Cameron Whetten
Inventor 2014