Hi all,
I guess I post it at the wrong place. Now I re-send it to the developers'
maillist and hope to get some opinions and advice. I have built my xfem
codes with another FEM library FEniCS/dolfin when I studied at
Northwestern, I am curious about the possibility to move it to LibMesh.
Thank you
On Fri, 21 Nov 2014, Xujun Zhao wrote:
> I guess I post it at the wrong place.
libmesh-users was the right place; unfortunately I suspect you posted
at the wrong *time*. Ben Kirk would be the expert on the current
preliminary XFEM+libMesh status, but he's probably too busy to follow
the mailing
Ben Spencer (copied on this email) has done quite a bit of this in MOOSE (
mooseframework.org ) as well. Maybe he'll tell us when it's going to get
committed to the main MOOSE repo! :-)
Derek
On Fri, Nov 21, 2014 at 1:27 PM, Roy Stogner
wrote:
>
> On Fri, 21 Nov 2014, Xujun Zhao wrote:
>
> >
I'm curious if you've had any issues relating to integrating over
discontinuities, as that's the first & only thing I've taken a stab at.
As for the old dof indices bit, I'd be happy to participate in that discussion,
especially if you can create the problem with a minimal example.
-Ben
-
Yes, I am working on XFEM in MOOSE. I'm following a different route from
what Ben Kirk is doing -- I'm using the phantom node approach rather than
adding degrees of freedom to enriched nodes.
We have a reasonably complete implementation of brittle fracture in 2D with
our code, and have used it to
We've tried a few techniques for integrating the partial elements. For our
problems, we're really interested in using the original integration points
to avoid the need to map any stateful data to new integration points.
We've experimented with some techniques to use the original integration
points
> As for the old dof indices bit, I'd be happy to participate in that
>> discussion, especially if you can create the problem with a minimal example.
>>
>>
I appreciate the offer. I'll work on setting up a really minimal test
case.
-Ben
---
Thank you very much for those information. If this involves MOOSE, I think
I should bring Dmitry in :-)
It seems both LibMesh and MOOSE are working to implement xfem on fracture
problems. Is this for dynamic cracks or just static ones? How about the
weak discontinuity problems, for example, materi
On Fri, 21 Nov 2014, Benjamin Spencer wrote:
the prolongation/restriction code used for adaptive refinement in
libmesh is getting hung up dealing with the nodes that I create in
XFEM because they don't have old dof indices. I've made a couple of
small changes to my version of libmesh to get th
If you want to look at my code, it on my branch of MOOSE called
xfem_phantom at g...@github.com:bwspenc/moose. Look at the file
moose/framework/src/base/XFEM.C in the cut_mesh_with_efa() method.
Every time an element gets cut by a crack, I need to create new nodes
identical to some of the nodes o
On Fri, 21 Nov 2014, Benjamin Spencer wrote:
I could definitely be doing something wrong here -- I came up with
my method for adding elements and nodes and deleting elements based
on trial and error. I'm pretty sure we're not explicitly calling
DofMap::reinit() anywhere. Does it get called by
On Fri, Nov 21, 2014 at 1:57 PM, Xujun Zhao wrote:
> Thank you very much for those information. If this involves MOOSE, I think
> I should bring Dmitry in :-)
>
Definitely. Are you working with him? We work with him quite a bit, and
we've had some discussions on this topic in the past.
> It
Ben,
Xujun and I work on particles in fluid -- point particles for now,
generalizing to colloidal suspensions (of extended particles later).
In particular Xujun has a few ideas for using enriched bases he wanted to
try. These may be related to the basis enrichment ideas we had discussed a
few mon
Thank you for your answer and sharing those information.
Yes, I am working with Dmitry at Argonne:-). We have considered using the
xfem/pum to model particulate flow problems which may involve either
singular type enrichment or interface type enrichment. I have also worked
on xfem/lsm modeling of
Yes, this is more clear! :) Xujun
On Fri, Nov 21, 2014 at 4:46 PM, Dmitry Karpeyev
wrote:
> Ben,
>
> Xujun and I work on particles in fluid -- point particles for now,
> generalizing to colloidal suspensions (of extended particles later).
> In particular Xujun has a few ideas for using enriched
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