MultiParameterPlasticityStressUpdate: Minimum step-size violated #29381
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Rahim-Habibi
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Replies: 1 comment 7 replies
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DId you try doing what the exception says (reducing the time step size)?
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7 replies
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actually you can set the min step size to this material using the "min_step_size" parameter. This might let you increase it |
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@GiudGiud . Time Step 0, time = -172800 Postprocessor Values: Time Step 1, time = -172800, dt = 0.1 Performing automatic scaling calculation 0 Nonlinear |R| = 1.796294e+00 MultiParameterPlasticityStressUpdate: Minimum step-size violated A MooseException was raised during FEProblemBase::computeResidualTags Nonlinear solve did not converge due to DIVERGED_LINE_SEARCH iterations 0 Solve failed, cutting timestep. Time Step 1, time = -172800, dt = 0.05 |
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Do you think it is good idea to play with "preconditioning" and "solve_type"? |
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@GiudGiud , |
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if the Jacobian is numerically exact you can try to set solve_type to a Newton method This log shows the same error. The inner solve in the MultiParameterStressUpdate is failing. You should open that file to try to find out what s happening |
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Hi all,
I am running a model to simulate the plastic response of the system but unfortunately i got the following error "A MooseException was raised during FEProblemBase::computeResidualTags". I have found someone already asked such qestion #25694 but it has not been answered yet. the following shows the log:
Currently Executing
Performing Initial Setup..
Finished Projecting Initial Solutions [ 9.41 s] [ 900 MB]
Currently Setting Up Materials
Finished Computing Initial Material Values [ 0.92 s] [ 1137 MB]
Finished Setting Up Materials [ 0.92 s] [ 1137 MB]
Building SemiLocalElemMap.. [ 24.15 s] [ 1179 MB]
Still Performing Initial Setup
Finished Performing Initial Setup [ 65.94 s] [ 1179 MB]
Time Step 0, time = -172800
Postprocessor Values:
+----------------+----------------+----------------+----------------+-------------------+
| time | dt | flood_count | max_dP | max_stress_excess |
+----------------+----------------+----------------+----------------+-------------------+
| -1.728000e+05 | 0.000000e+00 | 0.000000e+00 | 0.000000e+00 | 0.000000e+00 |
+----------------+----------------+----------------+----------------+-------------------+
Time Step 1, time = -86400, dt = 86400
Pre-SMO residual: 1.22015e+14
Finished Computing Pre-SMO Residual [ 5.09 s] [ 1242 MB]
Performing automatic scaling calculation
0 Nonlinear |R| = 3.479580e+00
Computing Jacobian [ 10.04 s] [ 1261 MB]
MultiParameterPlasticityStressUpdate: Minimum step-size violated
To recover, the solution will fail and then be re-attempted with a reduced time step.
A MooseException was raised during FEProblemBase::computeResidualTags
MultiParameterPlasticityStressUpdate: Minimum step-size violated
To recover, the solution will fail and then be re-attempted with a reduced time step.
Nonlinear solve did not converge due to DIVERGED_LINE_SEARCH iterations 0
Solve Did NOT Converge!
Finished Solving [ 49.36 s] [ 1296 MB]
Aborting as solve did not converge
Solve failed, cutting timestep.
Time Step 1, time = -129600, dt = 43200
Pre-SMO residual: 3.47958
0 Nonlinear |R| = 3.479580e+00
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