Hi everybody,
I'm an engineer student who's going to start his internship very soon.
The mission is about high frequency dynamic in aeronautic field, and about impact. The FEM solver i'll work with is LS-PrePost.
So i'm looking for ressources to learn a bit about it, and being a little familiar with LS-PrePost before my taking office.
Thank you very much for you help,
Regards.
Hi ,
there are many online links available to learn LS-Prepost . However you need to practice the saving the input file and Giving the calcuation run , the best way to learn is make mistakes and rectifying that error ( Debugging the model)
Also a good book i found on amazon is : https://www.amazon.com/LS-DYNA-Engineers-Practical-Tutorial-analysis/dp/1703208854
Contact me on geardyn.1@gmail.com for other models/ tutorials.
Contact me on geardyn.1@gmail.com for other models/ tutorials.
Hi @ezekiell,
Awesome to hear you are getting into the field! Your first step will be getting the hang of the Prepost UI and the format of the LS-Dyna files. A combination of YouTube and asking questions here will probably be enough for this.
Then you should definitely look into doing the LS-Duma examples below:
https://www.dynaexamples.com/show-cases
You can also just ask your questions here and we will all do our best to answer them.
Ty very much guys for answers.
I have already DL this version : " LS-PrePost-4.3.38-x64-30Jan2019_setup "
And i am currently following this YT tutorial to hang on PrePost interface.
https://www.youtube.com/watch?v=4L9pj6ZsAns&list=WL&index=4
and the format of the LS-Dyna files.
What's so special with the format ?
To be honest, i feel a little lost about LS-Dyna/PrePost.
I've used until now Cast3M/Abaqus/FEniCS for FEM. But LS-Dyna looks very different than these stuffs.
I mean, what's the difference between LS-Dyna and LS-Prepost ?
Tell me if i'm wrong, but is LS-Dyna a type of "code", or something like a library, that can be used trough LS-Prepost which is a graphic interface to run calculations ?
Well, it's not clear for now ^^'
@ezekiell I think this site will be extremely useful to you in wrapping your mind around the format and what does what.
https://www.dynasupport.com/tutorial/getting-started-with-ls-dyna/getting-started
LS-Dyna uses are "card" system where things within the model are denoted by classifications (*PART, *Element_solid, *Node, *Contact, *Boundary). Every model needs some of these, whereas, there are tons that are very specific towards certain applications.
Within FEA you have three basic steps: Pre-processor -> Solver -> Post-processor
LS-Dyna is the solver, just like Abaqus. However, unlike Abaqus, LS-Dyna doesn't have a built-in pre-processor to setup your simulation. So you have many options to choose from: Hyperworks, Primer, Ansa, and LS-PrePost. LS-PrePost is the most common for academia since it is free and fairly easy to get the hang of (but it can be buggy). However, LS-Prepost does not "run" anything. Things like Primer are harder to get used to but are much better at streamlining processes, but they cost money.
One of the benefits of LS-PrePost, is that it also functions as a post-processor, where you can open your output animation (.d3plot) and any data (ascii or binouts). There are other post-processors as well like Meta and Hyperview.
Long story short, LS-Dyna is much less "rigid" in terms of the processes that you need to take and how you take them than other FEA solvers like Ansys and Abaqus. This can lead to a lot more flexibility, but can also lead to more headaches when trying to figure out how or what to use. The most important part is to learn LS-Dyna specifically, not all these different pre and post processors. It is 100% fine to learn and use LS-PrePost for this.
Waw, thank you very much for your explanations ! That's crystal clear now !
Ok, so i was almost correct in my mind, but you used the right terms to qualify it.
LS-Dyna is the solver, and LS-PrePost is the Pre-processor and can be the Post-processor too.
Your link seems useful, i'll check it.
Thanks again !