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Ah, that error just drives me crazy! I honestly don't know for sure how to get rid of it, but usually, playing around with the mesh eliminates it. Just try to make sure that no element that is part of the contact definition has something else defined on it (example, element is defined being in...

In principle, the clearance value is there in order to create an artificial clearance or interference, without taking the geometry into consideration. This means that even if the two geometry has an interferance, if you specify a clearance, it wont considerate the interferance. Works pretty...

ok, I am guessing that the three contacts we see in the pictures are between the pin and lug (middle one) and pin with bushings (two extremities). I picture of the assembly with transparent parts would also be usefull to see how everything is assembled. Can you send a picture with the results...

engjeff, Does the pin shoots out axially of the bushing? Again, dou you have a picture of the assembly of the pin? Usually, what I do for an assembly pin/bushing, is to define a contact between the inner face of the bushing to the outer face of the pin. Then, restraint one of the side faces...

That is right. The reality is somewhere in between. The only thing that you can do to have a better notion of what is really going on is to use a non-linear solution with contacts. (Not possible in Catia) but this is anoher game. But is it really worth the cost of it?

Maybe this link might help you... http://www.eng-tips.com/viewthread.cfm?qid=241596&page=1

acoidanbm, Are you sure you are looking in the right folder? Usually, Patran (and nastran if you run it directly from Patran) creates the result file in the same folder as Patranwas started from. It might be a different folder that where the database is.

PerKr, Basically, CATIA creates a null–length rigid bar at the middle point between the centroids of the two surfaces to connect. Then, each extremity of this null-length bar is connected via a rigid spider (equivalent to MSC/Nastran RBE2 element) to the nodes of the surfaces. Being a rigid...

Hi engjeff, could you send some pictures in a doc format in order to have a better idea of your model? Thanks.

Score33, I might be a pain in the ass, but what I am doing is making a copy of the short cut on my desktop. Right click and edit the start in to match the folder where you are working. So you can have as many copied shortcut as you have folder you are working in. That way, Patran will always...

Ok, We found how to access results at the integration points in Patran. Access Results - Translation parameters and then you can check gauss points results.

engjeff, One thing we haven't precised at the beginning. What version of Catia are you using? I just assumed that it was V5 R14 or up. If it is the case, just look at the document I just made up. I hope this will help a little bit...

engjeff, Just tried it and it does work perfectly. Point loads can easily create peak stresses, so be carefull!

Engjeff, CAtia does not allow to apply anything directly on the mesh, unfortunately. If the point lies on the surface of the solid, you could try the following. I have never tried it but always wanted to. So maybe you could tell me if it works or not. With the Shape workbench, create a point...

hi marco, You should probably post this question in the Finite element analysis engieering forum or MSC Software Patran forum since you seem to be using Nastran sol106. I am not sure this subject belong in this forum. You will have probably more answers on those forums anyway. Regards

That is something I have to find out how do to with Patran sol600. I don't know if it is an option always available or you have to call something in order to access stresses at integration points.

I agree with a lot that has been said here. The question I have is that the mesh we are using is fine enough (quality check has been performed as well to ensure the element quality) and wether you look at centroid stress interpolation or nodale shape function interpolation, the stresses vary a...

crisb, Are you plotting Von Mises stresses, principal, just cauchy components? Do the stresses at integration points can exceed Ftu in a non-linear run? I guess not because the softaware should follow the material curve at least at the integration points. What if the stresses at integration...

Hi, I am using MSC Nastran Sol600. I would like to plot the stresses at the integration points. Is it something that can be done in Patran? If yes, how can it be achieved? Thanks.

Hi, In my company we are starting to investigation non-linear FEM. WE encountered some situations that lead us to question the results we are getting. Since then, we have some debates going on and I would like to have your two cents. (We are using mostly Nastran/Patran, but I guess the subjects...