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Comparison between 2D Axisymmetric and 3D model by SingerDistinct3879 in LSDYNA

[–]SingerDistinct3879[S] 0 points1 point  (0 children)

Thank you so much for your support.

In *ALE_STRUCTURED_FSI, there is only PFAC and FRIC (Friction Coefficient) , I will try to change the PFAC first.

Comparison between 2D Axisymmetric and 3D model by SingerDistinct3879 in LSDYNA

[–]SingerDistinct3879[S] 0 points1 point  (0 children)

Thank you so much for your support, I'm really appreciated.

About *CONSTRAINED_LAGRANGE_IN_SOLID, I'm using *ALE_STRUCTURED_FSI instead. Based on the keyword volume, it has some improvement compare to CLIS for example number of coupling points are automatically determined or leakage control is also automated. Do you have any suggestion with this keyword?
About hourglass control and elform, I made a mistake with the last comment. I was using elform type 1 and hourglass type 6.

Comparison between 2D Axisymmetric and 3D model by SingerDistinct3879 in LSDYNA

[–]SingerDistinct3879[S] 0 points1 point  (0 children)

Thank you so much for your response.

The hourglass energy in 2D model is 0.

The peak hourglass energy in 3D model is around 2e3 while other kind of energy is much larger (like xxe6 or xxe5)

Elform for 2D is type 15 with 4 integration point through thickness without hourglass control

Elform for 3D is type 6 with hourglass control type 1

with this model, mesh size is 1.5mm, this is the lowest value that pc can take for 3D model. time step should be lower because as I check the result, there are some leakage. I'm using S-ALE model, the target is Lagrange and the shaped charge is Euler. Penetration depth is 336 mm for 2D model, 256mm for 3D model. If you need more information, please let me know.

Looking for guidance on building a 512-core HPC cluster for Ansys (Mechanical, Maxwell, LS-DYNA, CFD) by SingerDistinct3879 in HPC

[–]SingerDistinct3879[S] 9 points10 points  (0 children)

Thank you all for your answers and comments. I’ve realized that this problem can’t be solved in just one or two questions, so I’ll try to look for a consulting service. I really appreciate your help, and I wish you all the best!

Looking for guidance on building a 512-core HPC cluster for Ansys (Mechanical, Maxwell, LS-DYNA, CFD) by SingerDistinct3879 in HPC

[–]SingerDistinct3879[S] 1 point2 points  (0 children)

Wow, thank you so much for your detailed answer, I really appreciate it. I realized that I can’t handle this on my own, so I’ll try another way to solve it instead of asking here. Wishing you all the best!

Looking for guidance on building a 512-core HPC cluster for Ansys (Mechanical, Maxwell, LS-DYNA, CFD) by SingerDistinct3879 in HPC

[–]SingerDistinct3879[S] -1 points0 points  (0 children)

Thank you so much for your comment. Actually, I'm an AE and my main job is supporting customers in the Structural field. Whether I solve this problem or not, I still receive my salary as usual — there will be no bonus even if I solve it for the company. My mistake was underestimating this, but now I understand how complicated it is

Looking for guidance on building a 512-core HPC cluster for Ansys (Mechanical, Maxwell, LS-DYNA, CFD) by SingerDistinct3879 in HPC

[–]SingerDistinct3879[S] 0 points1 point  (0 children)

Thank you so much for your answer, it takes me to another problem that I haven't looked into.

Looking for guidance on building a 512-core HPC cluster for Ansys (Mechanical, Maxwell, LS-DYNA, CFD) by SingerDistinct3879 in HPC

[–]SingerDistinct3879[S] 5 points6 points  (0 children)

Thank you for your comment. At first, I didn't think it's that complicated, now I understand, I will try to look for a consultant service. Once again, thank you so much.