** RUN KILLED: TOTAL MASS ERROR LIMIT REACHED

Svenja Potthast

Hello together,

i am struggeling with my Frontcrash model in Hyperworks radioss. 

The Solver faild with the massage: ** RUN KILLED: TOTAL MASS ERROR LIMIT REACHED

I wantet to enlarge my model by "adding" a new part and meshed it. I do not understand what I forgot in the settings. bevore the extension of my model, the simulation run.  the listed warnings have been there bevore, but it worked out. in the attachement i will add my *.rad and *.out file.

I hope somebody can help me with my problem(s).

.. UNITS SYSTEM
 .. CONTROL VARIABLES
 .. STARTER RUNNING ON    1 THREAD
 .. MATERIALS
 .. NODES
 .. PROPERTIES
 .. 3D SHELL ELEMENTS
 .. 3D TRIANGULAR SHELL ELEMENTS
 .. SUBSETS
 .. BOX
 .. ELEMENT GROUPS
 .. PART GROUPS
 .. SURFACES
 .. NODE GROUP
WARNING ID :    692
** WARNING IN SURFACE DEFINITION
WARNING ID :    690
** WARNING IN NODE GROUP DEFINITION
 .. BOUNDARY CONDITIONS
 .. INITIAL VELOCITIES
 .. DOMAIN DECOMPOSITION
 .. ELEMENT GROUPS
 .. INTERFACES
 .. INTERFACE BUFFER INITIALIZATION
 .. RIGID WALLS
 .. RIGID BODIES
 .. RETURNS TO DOMAIN DECOMPOSITION FOR OPTIMIZATION
 .. DOMAIN DECOMPOSITION
 .. ELEMENT GROUPS
 .. INTERFACES
 .. INTERFACE BUFFER INITIALIZATION
WARNING ID :    343
** WARNING: INITIAL PENETRATIONS IN INTERFACE
 .. RIGID WALLS
 .. RIGID BODIES
 .. ELEMENT BUFFER INITIALIZATION
WARNING ID :    312
** INCOMPATIBLE KINEMATIC CONDITIONS IN MODEL
DESCRIPTION :
    3516 INCOMPATIBLE KINEMATIC CONDITIONS IN MODEL
 .. GEOMETRY PLOT FILE
 .. PARALLEL RESTART FILES GENERATION

Mathis

Hi Svenja,

There is an issue in your /INTER/TYPE7 contact interface: no parameter has been defined. as a consequence there are initial penetrations in the gap that bring trouble to the numerical stability of this model. 

Could you please refer to this best practice document: https://community.altair.com/community?id=kb_article_view&sysparm_article=KB0121504 

It will help you define the type7 interface correctly. 

I hope it helps.

Regards,
Mathis.  

Mathis

Mathis Loverini_20748 said:

Hi Svenja,

There is an issue in your /INTER/TYPE7 contact interface: no parameter has been defined. as a consequence there are initial penetrations in the gap that bring trouble to the numerical stability of this model. 

Could you please refer to this best practice document: https://community.altair.com/community?id=kb_article_view&sysparm_article=KB0121504 

It will help you define the type7 interface correctly. 

I hope it helps.

Regards,
Mathis.  

Hi Svenja,

Is your model working now?

Regards,

Mathis

Svenja Potthast

Mathis Loverini_20748 said:

Hi Svenja,

Is your model working now?

Regards,

Mathis

Hi Mathis,

thanks for your answer. I had no chance to try it by now. I had to pause this project. But I will try as soon as there ist time for it.

Kind regards

HarishT

Hi Svenja,

As Mathis said, please cross check the contact parameters defined in the model.

Also make sure that for best practice mass addition should be less than 5%. and cross check the energy error in  engine out file it should be less than 10%.

 

Regards

Harish