Search found 236 matches
- 15 Apr 2024, 14:40
- Forum: ElmerSolver
- Topic: Stress Solver - Pre-strain is not applied?
- Replies: 4
- Views: 200
Re: Stress Solver - Pre-strain is not applied?
After checking the solver code I think a given Pre Strain is used only in special cases where the effect of geometric stiffness is activated (Stability Analysis = True or Geometric Stiffness = True). If you update to get the change https://github.com/ElmerCSC/elmerfem/commit/48ade7a16ddaeee4ceefe731...
- 11 Apr 2024, 13:14
- Forum: ElmerSolver
- Topic: Timoshenko Beam Solver and Conforming Boundary Conditions
- Replies: 5
- Views: 200
Re: Timoshenko Beam Solver and Conforming Boundary Conditions
Do you know whether this change in the routines will happen soon? If you update to obtain the change https://github.com/ElmerCSC/elmerfem/commit/7a166454a4559e7518da7f1ae79ab01f1aa44250 it might now be possible to apply Conforming BC in connection with a 1-D model. I also added a simple test https:...
- 10 Apr 2024, 14:01
- Forum: ElmerSolver
- Topic: Timoshenko Beam Solver and Conforming Boundary Conditions
- Replies: 5
- Views: 200
Re: Timoshenko Beam Solver and Conforming Boundary Conditions
Do I need to put additional input there? I would expect not as CBC should just replace the dofs with the corresponding node and checked a test . I think there is a problem in the library subroutines that prevents the creation of constraints when the boundary is defined in terms of point (101) eleme...
- 10 Apr 2024, 10:18
- Forum: ElmerSolver
- Topic: MgDyn2D and high-order element
- Replies: 7
- Views: 422
Re: MgDyn2D and high-order element
Here the keywords "Quadratic Approximation" and "Use Piola Transform" relate to the 3-D solvers where the discretization is done in terms of curl-conforming (edge element) basis functions. The 2-D version uses standard basis functions and doesn't need these commands. However it m...
- 05 Apr 2024, 09:33
- Forum: ElmerSolver
- Topic: Plane wave in the acoustics solver
- Replies: 1
- Views: 180
Re: Plane wave in the acoustics solver
Some comments on the BC named as "symmetry": - to obtain symmetry the normal component of the velocity should be set to be zero, together with the do-nothing (default) BC for the temperature - if a component of velocity is specified, the corresponding component of the surface traction cann...
- 29 Mar 2024, 13:21
- Forum: ElmerSolver
- Topic: Helmholtz BC vs. Acoustics BC
- Replies: 2
- Views: 869
Re: Helmholtz BC vs. Acoustics BC
Suitable BCs are explained in Section 13.2.2 of the documentation https://www.nic.funet.fi/pub/sci/physics/elmer/doc/ElmerModelsManual.pdf as "For example, outgoing waves may be approximated by setting Z = −rho_0 c and ZT = −iω/c on the outflow boundary". That is, one has to give also an im...
- 04 Mar 2024, 11:49
- Forum: ElmerSolver
- Topic: UMAT and mortar BC
- Replies: 6
- Views: 570
Re: UMAT and mortar BC
Thanks, your changes have now been merged. I noticed a small mistake in a size specification of memory allocation. It is also fixed in the devel branch.
-- Mika
-- Mika
- 09 Feb 2024, 12:37
- Forum: ElmerSolver
- Topic: UMAT and mortar BC
- Replies: 6
- Views: 570
Re: UMAT and mortar BC
Hi,
I think you have done right code modifications to allow for a normal-tangential BC with UMAT. They might well be worth creating a pull request.
-- Mika
I think you have done right code modifications to allow for a normal-tangential BC with UMAT. They might well be worth creating a pull request.
-- Mika
- 30 Nov 2023, 12:59
- Forum: General
- Topic: 1D beam modelling
- Replies: 38
- Views: 3558
Re: 1D beam modelling
I made a small change to the devel branch so that mass-proportional damping (Rayleigh Damping Alpha) for translational motions can now be given for the beam solver, whereas giving Rayleigh Damping Beta = ... causes a warning message.
- 29 Nov 2023, 18:18
- Forum: General
- Topic: 1D beam modelling
- Replies: 38
- Views: 3558
Re: 1D beam modelling
The beam solver doesn't yet understand the Rayleigh damping parameters, but adding the Rayleigh damping would be an easy modification