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1) I thought thats normal because Etotal is constant with a deviation of 1% 2) I thought the step up is due to the step up in artificail energy, thats why there is also a step up in Internal Energy

I did. The problem is not that ETotal isnt constant my problem ist that Einternal is way above Etotal. And that makes no sense for me. How can there be more Internal Energy than the total amount of energy that is avaiable?

Yes INternal Energy Increases while kinetic Energy decreases. I added the Energies plots and they are above the ETOTAL I get from the History output. Is there something wrong with Etotal? ""surely" total energy remains constant in the FEA world ?" In Lagrangian formulation i thougt so. But if...

Yes I understand the chapter. and I see that ETOTAL = EI+ EV+EFD+EKE-EW and EI = EE+EP+ECD+EA. So if EA is High EI is high as well. And ETOTAL should be higer as well. So how can it be that Etotal is still constant while the INternal Energy is higher than ETOTAAL?

Yes youre right, the ALLAE is so high that Etotal is increasing. Now I have this plot, where ETotal is constant but ALLAE goes beyond ETOTAL. How is that even possible? Shouldnt ETotal be the highest...

Hello, I madea Bird strike simulation on a wing with Lagrange Methode. Everything works fine and I use a Tabular EOS for the bird with element deletion. Now I got the plot of the Energies and something is strange. As you can see the Total Eneryg is increasing even thoguh it should be constant...

Hello, I did a crash test, where i used bushing connectors with damage and plasticity model (The parameters I got from my University). I started the Simulation and everything was fine until 2 hours into the calulation an error appeard. In the status file there is this text: " ***ERROR: At...

Thank you very much, you helped me a lot!

Now I understand thanks for your help. One more and hopefully last question so that i know i understood it right: If i use Connector section then I have to somehow get the Damage and plasticity parameters, with another FEA of a solid Rivet or physical tests right?

I look around a little bit in Abaqus Manual. Is Beam MPC the same as "Rigid MPC" in the fastener property module? (see Image). If so, doesnt that mean the Fastener/Rivet I Created is rigid?https://files.engineering.com/getfile.aspx?folder=f22859b7-2503-43bf-85d8-0d9fd3a49741&file=1.PNG

Hello, Thanks for the answers. Youre right, I cant perform physical tests. Isnt the Busing connector approach the same as the Mesh independent fastener method? I thought Bushing is just the section assignment for the fasteners. If I use the mesh-independent fasteners can I define the damage...

Hello, I have a question regarding bushing connectors in Abaqus. Can you tell me how do i get the material parameters i need? I have to get the ones in the picture but i dont know what D11-D22 etc. are. Do I have to calculate them with for example the Huth equation? If so,how do I get the...

Thank you, I Found it, this is very helpful

I have acces via my uni mail. But I cant find the article in the kowledge base.

Thanks, I always thought there was no hourglassing in CEL because there is no mesh distortion. WHat can I use to verify the results? I thought Etotal ist a good indicator because of loss in mass. And ALLAE as well like in Lagrange but now im confused.

Hello, Im doing a Bird strike with a Eulerian Mesh. Everything works fine, I have a box with Eulerian Elements and define an EOS and a Bird Geometry. I "shoot" the bird on a Steel PLate to lateer get the PRessure curve. I am also looking at the Energies. I know that, when you use Lagrange...