simulation fem for application cad

[mekeuro]

I saw that by now all the famous cad have integrated the powerful fem software
1)nx and solidedge integrated nastran
2)ptc creo ansys
3)autodesk inventor also their nastran
possible that dassault owner of catia, solidworks and abaqus does not integrate this last but must have both programs? ? ?
I mean, if there's a more advanced and precise structural analysis where the top is required, do you need both?
Has anyone news previewed?? ? I think if they don't move they stay out of the market, because no one is broken to buy 2 programs when others sell you one! !

 

[ceschi1959]

I saw that by now all the famous cad have integrated the powerful fem software
1)nx and solidedge integrated nastran
2)ptc creo ansys
3)autodesk inventor also their nastran
possible that dassault owner of catia, solidworks and abaqus does not integrate this last but must have both programs? ? ?
I mean, if there's a more advanced and precise structural analysis where the top is required, do you need both?
Has anyone news previewed?? ? I think if they don't move they stay out of the market, because no one is broken to buy 2 programs when others sell you one! !

from what I know nx has, by default, a wizard for static analysis for only one body while if you want the fea package you have to cum about 30k and you have nx nastran as solutor but you miss, for example, the drafting...

 

[mekeuro]

from youtube I saw tutorials for autodesk inventor nastran in-cad and also solves assemblies, as you can see from these and other videos refers to the "contacts" precisely to solve assemblies. I'm not very informed about the topic since yesterday I started following the story, so I can shoot bullshit!! I am here to understand if others are already informed on the topic!

 

[TECNOMODEL]

inventor integrated nastran from the release 2018.

 

[cacciatorino]

I'm not very informed about the topic since yesterday I started following the story, so I can shoot Shit!! I am here to understand if others are already informed on the topic!

Usually the integrated fems and included in the price are simplified versions that for example do not manage contacts, square mesh, non-linear materials etc. to have everything you need to buy the versions "full" for which they go away several thousand more euros than the basic package.

p.s. could you try to use a language more appropriate to a professional forum? Thank you.

 

[mekeuro]

from the video attached above, at least giving a quick look this morning, you can notice that it is a webinar on the management of connections and therefore more parts among them. Finally I also allego as siemens nx with integrated nastran manages linear, square and cubic mesh... and finally allego as inventor nastran incad also manages non-linear analysis. ? . but on youtube there are also videos of nx siemens nastran with non-linear analysis.
I repeat I am entering the topic now and I might be wrong.....

 

[cacciatorino]

from the video attached above, at least giving a quick look this morning, you can notice that it is a webinar on the management of connections and therefore more parts among them. Finally I also allego as siemens nx with integrated nastran manages linear, square and cubic mesh... and finally allego as inventor nastran incad also manages non-linear analysis. ? . but on youtube there are also videos of nx siemens nastran with non-linear analysis.
I repeat I am entering the topic now and I might be wrong.....

Yes, I meant that it is typically license levels much higher than the 6-7000 euro versions that are usually found in technical offices. for example to have solid edge "simulation" I think you have to buy the version that costs 10-12,000.

 

[mekeuro]

Yes, I meant that it is typically license levels much higher than the 6-7000 euro versions that are usually found in technical offices. for example to have solid edge "simulation" I think you have to buy the version that costs 10-12,000.

No, my question is not related to the price.
my question is: all cads are evolving with these powerful and prestigious software integrated, possible that the dassault owner of abaqus does not offer this software on its own cad (catia v5 and solidworks, in fact both have integrated solutors at least on the non-prestigious paper like nastran and ansys)
there are some companies that unfortunately still look after the name "prestigious" of the solutore fem
airbus also for fem analysis on the seats non-structural part of an airplane asks minimum nastran! and other houses ask for one choice between ansys, nastran or abaqus

 

[gerod]

Hunter quoto.
If you want a good stuff, you have to go to fem that integrate their modeler. ansys also has its own modeler that is nothing bad (space claim). I tried that of sws, we have the license but I am not with the fem, too complex and simplified (it will be because I use ansys).
It will be their policy not to integrate an important name.

 

[meccanicamg]

I don't know what to say. I personally find the fem well that is in premium solidworks. easy and intuitive, smart controls and immediate results.
years ago there was in the installation of soacelcaim the version of ansys and I tried to use ansys also alone. But if you do not use it as a workbench you become mad. you don't have to lose your life making a fem and it has to be visual, with icons etc.
Now I also use calculix which is a base of abaqus....nice, powerful, but if you take it raw without integrating it into a cad you die inside.
in the company when designing carpentry or special pieces stressed need immediate solution.

 

[drake]

apart from reasoning on the correctness of the results of the fem calculations integrated in cad, a world would open. I hope I am not wrong or that we have not changed the fem motor, but within solidworks is present cosmos, which is not exactly the last arrived or not complete of other apparently more blasoned packages.

 

[Onda]

I do not use catia, but it seemed to me that he also had an integrated version of abaqus. the solutor of solidworks, as already written is cosmos, which is great while the inventor solutor is called in the nastran and in common with nastran has the cards and little more but is not the same solutor. (as they are, at least for classic nx nastran and msc nastran) solutions
In practice, I find that all cads have a good integrated fem, which serves to do rapid initial analysis. if you want to go deeper, you need more expensive and complete tools.
Basic those in cads are all good, tested and valid, you can then have more ease to use one or the other. .

 

[exxon]

you could make a benchmark, but I'm worried by the almost certain that the different results would be as many as the programs we could use. . .

 

[meccanicamg]

I have always made the 10x10 square cross-section travet for calibration over the years, with ink and toe force that flet. always same results with all the fems.

 

[exxon]

happy to make a mistake in this case. even if I thought of something a little more challenging for the solutor, like a quadrilateral or a beam with reinforcements.

 

[GiCor]

I don't know what to say. I personally find the fem well that is in premium solidworks. easy and intuitive, smart controls and immediate results.
years ago there was in the installation of soacelcaim the version of ansys and I tried to use ansys also alone. But if you do not use it as a workbench you become mad. you don't have to lose your life making a fem and it has to be visual, with icons etc.
Now I also use calculix which is a base of abaqus....nice, powerful, but if you take it raw without integrating it into a cad you die inside.
in the company when designing carpentry or special pieces stressed need immediate solution.

I insert myself to share the suggestion on calculix, which runs with freecad or with the modest but functional and effective mecway user interface. I also suggest free salome-meca fems and cfd code saturne di edf (the French enel), perhaps more suitable for r&d than for daily work.

Moreover, the complete suite of product design and manufacturing of autodesk (autocad, inventor with nastran, fusion 360 etc.) solves almost every needle with the large part of the small and medium customers and is now rentable monthly, to the necessity and also to the reach of small external operators.

 

[meccanicamg]

I recently found myself in a structural analysis scenario with very high forces.
having the license of solidworks symulation, the first level one, I know can do linear analysis only.
Unfortunately, the linear behaviour of the elastic module leads to deformations, very high stresses.
therefore the only way to study the phenomenon was the non-linear analysis of the material.
had it with freecad version 0,19 developer con il workbench fem I imported the frame step file, I set material, mesh with dimensions imposed to have a targeted study, loads and constraints and the law of non-linearity of the material.

with the command it is possible, in the present state to define three points in the plastic field defining for each point stress [MPa] e deformation [mm/mm].
In this way the solutor takes the elastic module of the material set to the base value and subsequently, with bilinear behavior defines the plastic trend.

the graphic results are interesting because there is also that of the plasticized areas.

 

[meccanicamg]

the only thing not exactly certain is the deformation value, which looking on the calculix manual says it is the equivalent plastic deformation.

this means that it is necessary to take the total deformation from the true traction curve, to remove the elastic deformation of the linear field and to multiply it by the square root of 2/3.

This is what is found on the net between explanations and existential doubts and could actually be true, since with the yielding requires a plastic deformation parameter equivalent to zero.

Moreover editing with the notepad the .inp file under the *plastic string can be defined more than three points and therefore really define the whole plastic tract point,what from freecad window you can only three points.