Can anyone verify that the method described in this link is a
valid and accurate method for evaluating point loads on an object?
Would you expect the deflection values presented by Cosmos to be in
accordance with reality?

http://www3.me.iastate.edu/me415_gassman/COSMOS03.pdf

http://www3.me.iastate.edu/me415_gassman/COSMOS03.pdf

Point loads are not what I would call realistic. Mathematically, these are singularities and in analysis lead to artificial stress concentrations. Everything in the real world is applied over a contact area (ie not at a point). The size of the contact area obviously changes with material stiffness of the contacting parts. The size of the contact area also indicates the sixe of the mesh in that area to give an accurate stress distribution.

There is no way you can trust the results in the area of the load as shown in the exercise. If you don't care about the area of the load application, I suppose you can use it to see the load/deflection of the overall model, but you will need to adjust your legend scales to filter out the results of the load point.

Hope this helps answer your query.

Cheers,

Ian