Dear Team, I am solving a problem in hyper-elastic area with Mooney-Rivlin constants. When i am applying the torque of 1 kNm its working fine, but applying 10 kNm its going to be diverge. How to over come this problem.

Hello @duraisamy , can you share a link to your project? With this little information it is impossible to tell what the problem might be. Best, Richard

Hi @rszoeke DEBUT(); ST=LIRE_MAILLAGE(UNITE=20, FORMAT=‘MED’,); RT=LIRE_MAILLAGE(UNITE=21, FORMAT=‘MED’,); MS1=LIRE_MAILLAGE(UNITE=22, FORMAT=‘MED’,); MS2=LIRE_MAILLAGE(UNITE=23, FORMAT=‘MED’,); RB=LIRE_MAILLAGE(UNITE=24, FORMAT=‘MED’,); SB=LIRE_MAILLAGE(UNITE=25, FORMAT=‘MED’,); mesh1=ASSE_…

Hi @duraisamy , you should share your project like this. [image] Click on Generate project link and share the link that you get with us. As I saw you already deleted the related simulation. Can you generate it again and share it with us please? Thanks and cheers! Jousef

@jousefm this project was not created with SimScale, it was directly done using Code_Aster locally. @duraisamy , can you also share the meshes such that we can reproduce the run? I saw that you also posted directly into the Code_Aster forum, I guess that’s also the more appropriate place, since Sim…

@rszoeke How to apply the torque ref the figure https://www.simscale.com/workbench?publiclink=4437e86a-a28d-4676-8048-bc6fbe03f48b [image]

Hi @duraisamy , I think you have a scaling problem with your geometries, that’s why the 2nd simulation does not work. You have cylinders in the range of 200[m] and only apply 41[N] compressive load. You can use the scaling operation on the geometry to scale it down to the actual size. Best, Richa…

Regarding your initial query, I think the problem might be that the higher load generates a too high rotation angle and that the approach you are using (LIAISON_SOLIDE - or with SimScale it would be “undeformable remote force”) only allows small rotations. In recent Code_Aster versions you can tur…

My cylinder object dimension is X=100 mm, Y=100 mm and Z = 600 mm. Mooney rivlin constants are in Mpa

SimScale CAE Forum

Hyper-elastic Non-Linear Problem

Using SimScale Solid Mechanics / FEA

duraisamy August 23, 2017, 11:43am 7

https://www.simscale.com/workbench?publiclink=f8edc00b-49e2-4722-925d-d343605c5bf6