Dear Junxiang Wang,
the reason is that we are dealing with a non-symmetric problem and the
test function determines the row, while trial functions
determine columns of the system matrix.
The quickest and easiest way is to switch those indices to achieve this.
In general, actually, the notation local_matrix( j, i ) is the correct
one, while local_matrix( i, j ) only holds true if your problem
statement is symmetric.
Best regards,
Thomas W.
--
---
+++++------------------------------------------+++++
Prof. Dr. Thomas Wick
Managing Director of the
Institut für Angewandte Mathematik (IfAM)
Leibniz Universität Hannover (LUH)
Welfengarten 1
30167 Hannover, Germany
Tel.: +49 511 762 3360
Email:[email protected]
www:https://ifam.uni-hannover.de/wick
www:http://www.thomaswick.org
+++++------------------------------------------+++++
---
--
Am 26.08.24 um 14:02 schrieb Junxiang Wang:
Dear Timo Heister Thomas Wick,
I have been reading your paper about phase-field crack propagation and
your code recently. May I ask why your index of assembly subroutine
has the form of local_matrix( j, i ) rather than the normal form of
local_matrix( i, j )?
Thanks a lots
On Tuesday, February 20, 2018 at 3:32:06 PM UTC+8 Thomas Wick wrote:
Dear Yaakov,
which article do you mean? Please give the exact reference
including author names.
I do not know a priori whether they have different material
parameters, another
stress-strain splitting, etc.
The reason for different results can be anything. One needs to do
a careful 1-by-1
comparison.
Best regards,
Thomas W.
On 02/19/2018 09:26 AM, Thomas Wick wrote:
Dear Yaakov,
which article do you mean? Please give the exact reference
including author names.
I do not know a priori whether they have different material
parameters, another
stress-strain splitting, etc.
The reason for different results can be anything. One needs to do
a careful 1-by-1
comparison.
Best regards,
Thomas W.
On 02/17/2018 01:41 AM, [email protected] wrote:
Dear Prof. Wick,
I have used isotrope formulation for miehe shear loading
(without local refinement). I ca not see two crack branching
which is described in the article (A review on phase-field
models of brittle fractureand a new fast hybrid formulation)
I attach the test results.
Thanks for your answer!
Kind regards,
Yaakov
On Saturday, February 3, 2018 at 7:20:27 AM UTC+1, Thomas Wick
wrote:
Hello,
there are two flags in the parameter file that you need to
change:
set Decompose stress in rhs = 0.0
set Decompose stress in matrix = 0.0
Thomas W.
--
++--------------------------------------------++
Prof. Dr. Thomas Wick
Institut für Angewandte Mathematik (IfAM)
Leibniz Universität Hannover
Welfengarten 1
30167 Hannover, Germany
Tel.:+49 511 762 3360 <tel:+49%20511%207623360>
Email:[email protected]
www:http://www.ifam.uni-hannover.de/wick
www:http://www.cmap.polytechnique.fr/~wick/
<http://www.cmap.polytechnique.fr/%7Ewick/>
++--------------------------------------------++
--
On 02/03/2018 03:24 AM, [email protected] wrote:
Dear Prof. Heister, I would like to just test isotrope
formulation of phase -field model (no compression/tension
modification), how could I modify the codes (in a simple
way)? I am sorry that I am just a beginner of DealII. Best
On Tuesday, December 5, 2017 at 7:01:17 PM UTC+1, Timo
Heister wrote:
> If I use your user element, I have to use OPEN MPI?
now I have some issues > with Open MPI in Deal.ii What
do you mean by "user element"? The example code in
question requires deal.II to be configured with MPI.
What vendor you use (OpenMPI, MPICH, ...) is up to you.
-- Timo Heister http://www.math.clemson.edu/~heister/
<http://www.math.clemson.edu/%7Eheister/>
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