documentation and software fem

[ector]

Hey, guys, I need your opinion. ..I must simulate high speed impacts and in doing so I need appropriate fem software. would you tell me which one is the best? or, what are there on the market?
I want to point out that my preparation on finite elements is very poor, so I ask you if you protest to give me tips on documents, dispenses and/or courses to follow/repair in order to handle this powerful tool.

I thank you in advance, I stress that thanks to your help I solved several problems!thanks... .

Ettore

 

[cacciatorino]

Hey, guys, I need your opinion. ..I must simulate high speed impacts and in doing so I need appropriate fem software. would you tell me which one is the best? or, what are there on the market?
I want to point out that my preparation on finite elements is very poor, so I ask you if you protest to give me tips on documents, dispenses and/or courses to follow/repair in order to handle this powerful tool.

I thank you in advance, I stress that thanks to your help I solved several problems!thanks... .

Ettore

I think you need a so-called "explicit" fem, check if impact can be good for you.
http://impact.sourceforge.net/But I never used it.

Bye.

 

[ector]

I think you need a so-called "explicit" fem, check if impact can be good for you.
http://impact.sourceforge.net/But I never used it.

Bye.

Thank you very much.
Is dyna knows him and/or knows how to use someone?

 

[MacGG]

Hello ettore81,

If you want to start, I suggest you give an eye to the problem manual md nastran that you find in:
http://www.scribd.com/doc/33463596/md-nastran-demonstration-problems-2010in particular you find a great example of bird strike, which uses the sol 700 for which you have the user manual in:
http://www.scribd.com/doc/20954989/md-nastran-r3-explicit-nonlinear-sol-700-user’s-guidethe sol700 is in practice ls dyna, they are in fact partially developed together, then the two software take different roads but still very similar.

Hi.

♪

 

[ector]

Thank you very much!
a question, what software do you recommend me to start working with finished items? I always speak explicit. . .

 

[Matteo]

Thank you very much!
a question, what software do you recommend me to start working with finished items? I always speak explicit. . .

there are many explicits on the market, but if you start working with finished items it will be hard to start with such an analysis (very complex).

I would be curious to try in the explicit, in the past I tried to do something with impact but the interface is very osticated.

 

[ector]

there are many explicits on the market, but if you start working with finished items it will be hard to start with such an analysis (very complex).

I would be curious to try in the explicit, in the past I tried to do something with impact but the interface is very osticated.

How do you suggest I start? consider that they are fasting or almost...impact is valid? worth trying to use it?

 

[Matteo]

I think you should address the "classical" theory of finite elements, even to get used to dealing with the concepts of "discretization", "grades of freedom", "convergence", "analysis in the domain of time and the freqeunze", "nonlinear contacts"... I see it as a next step. You could start with anything (by passing also for a theoretical approach, the bibliography is very broad), I would suggest a codic that allows you to "see" the tabs (msc nastran, neinastran, in part cosmos, or an open source code of the caelinux package).

 

[ector]

I think you should address the "classical" theory of finite elements, even to get used to dealing with the concepts of "discretization", "grades of freedom", "convergence", "analysis in the domain of time and the freqeunze", "nonlinear contacts"... I see it as a next step. You could start with anything (by passing also for a theoretical approach, the bibliography is very broad), I would suggest a codic that allows you to "see" the tabs (msc nastran, neinastran, in part cosmos, or an open source code of the caelinux package).

Okay, thank you very much for your help.

 

[MacGG]

Hello ettore81,

I fully agree with matteo.

in the links I have reported to you, you also find all the simple problems.

then, as I said many discussions ago, to face all the problems of a certain complexity, it serves:
30%: goodness of the solution you choose (software, which allows you to address the problem you have to study)
30%: skill of solution support (experience of who teaches you/supports in addressing the problem)
30%: skill of who must do the job (understand the problem, understand the software, explain what you want to do)
10%: a little luck (it is necessary when problems are really difficult, to find the way to verify that the data available is sufficient, are correct, etc.)

Hi.

♪