Search found 253 matches
- 19 Jun 2012, 11:23
- Forum: ElmerSolver
- Topic: Elmer p-adaptivity
- Replies: 13
- Views: 9822
Re: Elmer p-adaptivity
Hi, Although Elmer offers ways to build discretizations based on p-elements, it is not guaranteed that all existing solvers support this option without modifying the solver code. By a quick inspection, I would say that the HeatSolve.src does not have a ready functionality for making p-discretization...
- 20 Oct 2011, 09:00
- Forum: ElmerSolver
- Topic: Neo-Hooke implementation
- Replies: 17
- Views: 15927
Re: Neo-Hooke implementation
Hi, I just committed a revision of ElasticSolve.src to enable the simulation of Neo-Hookean material. In this case, the second Piola-Kirchhoff stress is written as G = lambda/2 * (J*J-1) * Inverse(C) + mu * ( I - Inverse(C) ) with C the right Cauchy-Green tensor and J the determinant of the deformat...
- 04 Oct 2011, 08:19
- Forum: ElmerSolver
- Topic: Neo-Hooke implementation
- Replies: 17
- Views: 15927
Re: Neo-Hooke implementation
Hi, I returned for a while to this other constitutive model to see whether I am able to differentiate the constitutive law in a closed form. The differentiation was actually quite elementary, so developing the Newton iteration also for this model should be possible. Based on these exercises some mod...
- 08 Sep 2011, 16:10
- Forum: ElmerSolver
- Topic: Neo-Hooke implementation
- Replies: 17
- Views: 15927
Re: Neo-Hooke implementation
Hi,
The equation number (6.3) in my previous message should of course be (6.5).
-Mika
The equation number (6.3) in my previous message should of course be (6.5).
-Mika
- 08 Sep 2011, 16:06
- Forum: ElmerSolver
- Topic: Neo-Hooke implementation
- Replies: 17
- Views: 15927
Re: Neo-Hooke implementation
Hi, First of all I would like to notify you that the documentation of the finite elasticity solver has eventually been done. I am attaching the relevant pages of the revised model documentation that concern finite elasticity. I hope that this limited piece of information helps in understanding what ...
- 01 Sep 2011, 18:33
- Forum: ElmerSolver
- Topic: Neo-Hooke implementation
- Replies: 17
- Views: 15927
Re: Neo-Hooke implementation
Hi, By exploring the code and taking the risk that I am not right, I would say that the finite elasticity solver treats the equations in the form where the constitutive equation describing the Piola-Kirchhoff stress is written as S = F G, with F the deformation gradient and G a response function def...
- 11 Jan 2011, 14:23
- Forum: ElmerSolver
- Topic: Memory allocation error & sementation fault
- Replies: 16
- Views: 12722
Re: Memory allocation error & sementation fault
Hi, I observed that applying BiCGStab(L) to a simple equation in combination with a highly accurate preconditioner may lead to a breakdown. This is indeed the situation in the stress computation here, so I expect that the NaN behaviour relates to this issue. I just committed a revision of IterativeM...
- 26 Apr 2010, 09:57
- Forum: ElmerSolver
- Topic: Convergence problem for smaller time steps!
- Replies: 2
- Views: 2761
Re: Convergence problem for smaller time steps!
Hi, There is a chance that this issue is related to a deficiency of standard stabilization strategies to cope with situations where the time step size is small in comparison with the spatial mesh size. A full discussion of this problem may be found at P. B. Bochev, M. D. Gunzburger and R. B. Lehoucq...
- 18 Dec 2009, 09:49
- Forum: ElmerSolver
- Topic: Elmer capabilities in acoustics
- Replies: 8
- Views: 7798
Re: Elmer capabilities in acoustics
Hi,
Unfortunately, at least for the time being, a purchasing possibility is not offered.
-Mika
Unfortunately, at least for the time being, a purchasing possibility is not offered.
-Mika
- 16 Dec 2009, 13:42
- Forum: ElmerSolver
- Topic: Elmer capabilities in acoustics
- Replies: 8
- Views: 7798
Re: Elmer capabilities in acoustics
Hi,
My impression is that these proprietary solvers will be made openly distributable in future, but I cannot guess when this will actually happen. I'm afraid that hoping it to happen in near future may be too optimistic.
-Mika
My impression is that these proprietary solvers will be made openly distributable in future, but I cannot guess when this will actually happen. I'm afraid that hoping it to happen in near future may be too optimistic.
-Mika