Search found 319 matches

by kevinarden
Today, 01:38
Forum: General
Topic: Solving solid mechanics problems with material plasticity
Replies: 38
Views: 4923

Re: Solving solid mechanics problems with material plasticity

This approach made it simple to adapt to 3D or 2D elements, yield occurs in either compression or tension, since it is based on mises stress.
UMATmises_yield.F90
(8.57 KiB) Not downloaded yet
case.sif
(2.43 KiB) Downloaded 1 time
by kevinarden
Yesterday, 14:33
Forum: General
Topic: Solving solid mechanics problems with material plasticity
Replies: 38
Views: 4923

Re: Solving solid mechanics problems with material plasticity

I have greatly simplified the bi-linear UMAT. It now checks the mises stress to determine yielding. Model convergence is greatly improved.

https://github.com/mrkearden/UMATLIB

see the github for file and the test case called coupon
result.png
result.png (22.68 KiB) Viewed 4 times
by kevinarden
Yesterday, 12:14
Forum: ElmerSolver
Topic: Linera elasticity stability analysis
Replies: 2
Views: 25

Re: Linera elasticity stability analysis

In the github for the source code there are many test cases which can be used as a tutorial.

https://github.com/ElmerCSC/elmerfem/tr ... s/buckling

This one is stability analysis
by kevinarden
Yesterday, 12:07
Forum: ElmerSolver
Topic: Linera elasticity stability analysis
Replies: 2
Views: 25

Re: Linera elasticity stability analysis

You did not state which solver you are using.

http://www.nic.funet.fi/pub/sci/physics/elmer/doc/

is the documentation

6.2.2 Modal, harmonic and stability analysis, chapter 6
by kevinarden
Yesterday, 01:18
Forum: Installation & compilation
Topic: Install ElmerGui on CentOS 7
Replies: 1
Views: 9

Re: Install ElmerGui on CentOS 7

I have tried and failed many times to compile ElmerGUI, the dependicies are many, and the particular versions of the dependecies are specific. Compiling ElmerGUI is very unlikely. The only way to succesfully run elmerGui under Redhat, fedora, etc. I know of is through a VM http://www.nic.funet.fi/pu...
by kevinarden
03 Dec 2019, 22:36
Forum: Software development
Topic: salomeToElmer - export Salome mesh to Elmer
Replies: 14
Views: 3029

Re: salomeToElmer - export Salome mesh to Elmer

I believe it varies for every solver or ElmerModel in the model manual. I think in general if nothing is assigned to a boundary, then nothing happens or is transferred through (either into or out of the mesh) at that boundary. This will have different effect in every solver. For example in a heat tr...
by kevinarden
03 Dec 2019, 02:47
Forum: Software development
Topic: salomeToElmer - export Salome mesh to Elmer
Replies: 14
Views: 3029

Re: salomeToElmer - export Salome mesh to Elmer

That i have never tried or tested.
by kevinarden
02 Dec 2019, 13:02
Forum: General
Topic: Solving solid mechanics problems with material plasticity
Replies: 38
Views: 4923

Re: Solving solid mechanics problems with material plasticity

Add another subroutine to the UMATLib_PLastic.F90 bi_linear_sym assumes the compression stress-strain curve is the same as the tensile stress strain curve. bi_linear has yielding in tension only. test case also add to github. I also added 9 state variables, elastic strain,plastic strain,total strain...
by kevinarden
01 Dec 2019, 12:15
Forum: Software development
Topic: salomeToElmer - export Salome mesh to Elmer
Replies: 14
Views: 3029

Re: salomeToElmer - export Salome mesh to Elmer

If I create groups in Salome for volumes, faces, and edges. The groups become bodies, and boundaries. The names come out in the mesh.name file

! ----- names for bodies -----
$ body1 = 1
! ----- names for boundaries -----
$ fixed_end = 2
$ load_end = 3
$ empty = 4
by kevinarden
30 Nov 2019, 15:41
Forum: ElmerSolver
Topic: how to activate Vibroacoustic Model
Replies: 4
Views: 71

Re: how to activate Vibroacoustic Model

There are many videos of Elmer solutions on youtube. Youtube has its own Elmer Channel. I use Paraview to make videos of Elmer solutions.