Implicit dynamics issue

[musen lin]

Dear all, 

I was implementing a computation of implicit dynamics  using Ls-Dyna, but the solver implied that the material model rejected current iterate as follows... The material model used in the simulation is a typical *MAT_024 piecewise_linear_plasticity. I am not sure why this happened.

Kind regards,

Musen

[James Kennedy]

Dear MUsen,

 

Please see following presentation:

 

Erhart, T., "Tips and Tricks for Successful Implicit Analyses with LS-DYNA", Moglichkeiten mit

LS-DYNA/Implizit, DYNAmore GmbH, Stuttgart, Germany, February, 2016

 

https://www.dynamore.de/en/downloads/presentations/2015/download-informationstag-Implizit-2016/05-2016-02-dynamore-infotag-implizit-tipstricks.pdf

 

Several other convergence discussions:

 

Laird, G., “LS-DYNA: Implicit Quick-Start For Explicit Simulation Engineers”, Predictive Engineering,

August, 2017.

 

https://www.predictiveengineering.com/content/ls-dyna-implicit-quick-start-explicit-simulation-engineers

 

https://www.dynasupport.com/howtos/implicit/implicit-convergence

 

https://www.dynaexamples.com/implicit/exercises8_solutions.pdf/

 

Sincerely,

James M. Kennedy

KBS2 Inc.

June 27, 2023

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