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How does ALGOR deal with yielding?

How does ALGOR deal with yielding?

How does ALGOR deal with yielding?

(OP)
It occured to me today when running an analysis that produced 300,000 psi that i did not know if ALGOR does any yielding analysis. I am assuming that if you are doing a linear stress analysis that the minute you have stresses past the yield point of the material, then the analysis will not be accurate.

RE: How does ALGOR deal with yielding?

That is correct.

With a Linear Stress Analysis, Algor (and all FEA programs really) extrapolate the stress/strain curve in the elastic region between 0 and the yield point.  Once you exceed the yield stress, it continues along the same slope of the curve to determine stresses at higher strains and/or deflections.

To get accurate results, you need nonlinear material models.  I typically run just about everything that I think may exceed yield with bi-linear material models.

--Scott
http://wertel.eng.pro

RE: How does ALGOR deal with yielding?

(OP)
That is too bad. I believe I only have the option to run with linear materials.

If I upgrade Algor to be able to do this, will it also provide failure analysis?

RE: How does ALGOR deal with yielding?

By "Failure Analysis" do you mean crack propogation?  Or just a Von Mises, or other failure criteria comparison?  If the former, you need a different type of analysis software.  If the latter, the linear stress post-processor has VM stress and others.

Algor non-linear will handle post-yield behavior and permanent deformation.

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