Bending the rules....

[NickE]

How easy/difficult/accurate is Cosmos/Geostar when the rules get bent? IE: if I wanted to figure out how a flat washer is gonna bend (plastic deformation)when pressed between two matching conical surfaces. Can you "cheat" and trick the system into modeling accurately the forces and distributions of strain/bending? Note i'm not expecting perfection but a good approximation. I know that drawing and material flow is not really modelable w/o proper software.

thx


Nick
I love materials science!

 

[macPT]

If I understand what you whant, you will need an nonlinear analysis, since you are not in the linear elastic limit of the material. You will not be able to do that with CosmosWorks, but mabe with COSMOS M. Try ALGOR.

Good Luck

 

[NickE]

From my understanding there is an advanced version of cosmos/geostar that supports nonlinear analysis. What I'm talking about here is simulating forming of parts using this non-linear analysis.

I kno0w that there is specialized software that is made for this however I was thinking that if I built a complex enough model then I could use geostar to get some info.



Nick
I love materials science!

 

[bobsheets]

Algor Non Linear Mech Event Simul will give you the deformed result after the load is removed with residuals. I have used it for fairly simple bending but never for hoop type stress. Be careful whatever you do!! Verify, verify and verify again.

 

[NickE]

bobsheets- good point about the verify statement.

My company is just getting into modeling for design and I always am reminding the boss that even thou the FEA said it would work we still have to physically test a few parts to correlate teh FEA data.

nick

 

[JNR]

Whatever FEA package you are using, buy their non-linear module (yes, Cosmos has one). In any, even if you switch brands, stick with one.

3/4 of all the Spam produced goes to Hawaii - shame that's not true of SPAM also.......