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MESSAGE ID : 207 ** RUN KILLED : TOTAL MASS ERROR LIMIT REACHED

Altair Forum User

Hiii,

I am getting one error while solving radioss run

MESSAGE ID : 207

** RUN KILLED : TOTAL MASS ERROR LIMIT REACHED

13689 0.3984E-01 0.3847E-10 INTER 1 99.9% 0.3105E+05 0.3029E+42 0.8363E+39 0.1711E+28 0.1959E+38
ANIMATION FILE: Rolling_Simu_Trial_MS_HRPM_IV_1A005 WRITTEN

** STATISTICS **

*** PARTS WITH HIGHEST KINETIC ENERGY

PART_ID K-ENERGY PROP_ID PROP_TYPE MAT_ID MAT_TYPE
5 0.2385E+05 1 14 2 2

*** PARTS WITH HIGHEST INTERNAL ENERGY

PART_ID I-ENERGY PROP_ID PROP_TYPE MAT_ID MAT_TYPE
5 0.3105E+05 1 14 2 2

can any one help to get rid of these error.

Thanks and Regards,

Suraj Kolte

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Altair Forum User

Hello Suraj,

It will be good if you send the _0001.out to understand the issue.

From these lines, it looks issue is coming from Interface Id = 1. What are the parameters you are using for this contact.

Regards

Prashanth A.R

Altair Forum User

Dear Prashanth,

Please find enclosed _0001.out file

Regards,

Suraj

Unable to find an attachment - read this blog

Altair Forum User

Hello Suraj,

From the out file I can make out that you have 99% error in the contact from the beginning itself. The suggested parameters for TYPE7 contact are:

Istf=4

Igap=2

Fscale_Gap=0.8

INACTI=6

Gap_min=0.1

Fric = 0.1

Iform=2

Make sure you have these parameters

Regards

Prashanth A.R

Altair Forum User

Dear Prashanth,

Thanks for your suggestions for parameter of TYPE7 contact.

After incorporating these changes in contact, Error remains same.

Please find enclosed .rad & .out file.

I am trying to simulate the roll forming simulation, the Blank should rotate with the rollers, but its is not rotating and forming.

Please guide on it.

Regards,

Suraj

Altair Forum User

Dear Suraj,

Download the model from below link.

Loads and BCs should be only on the Master node of RBODY.

Don't use StFac in the Contact for this case

You are running the model with a high time step which I have reduced.

https://ftin.india.altair.com:8443/message/AsTEsVuIsQRyb7aPyfI0Gu

Regards

Prashanth A.R

Altair Forum User

Dear Prashanth,

Thanks for your support.

I could now able to run file and see the results.

I have one query about the results, whether the forming results are with spring back effect? and if not then how to consider that effect in simulation?

Regards,

Suraj

Altair Forum User

Hello Suraj,

Good to know this.

To capture the spring back effect, you have to run a implicit run followed with the rolling analysis. So you have to have a second engine file in which you should have these springback options.

I have attached a sample file here, you can use the same file by changing the file name. As this is a second engine file, file name name should end as _0002.rad. You can restart your run to see the springback effect. In this forum, I have explained the procedure to restart. Please go through

Regards

Prashanth A.R

Unable to find an attachment - read this blog

Altair Forum User

Dear Prashanth,

I had run the _0002.rad file which you have attached by changing the name, but the solution is not converging and taking to much time.

Is there any other modification in _0002.rad I have to do, such as deleting interfaces or constraining the model in certain location?

Thanks & Regards,

Suraj

Altair Forum User

Hello Suraj,

Can you upload all the 3 .rad files to below link

https://ftin.india.altair.com:8443/filedrop/~6kl8U4

Regards

Prashanth A.R

Altair Forum User

I cannot simulate the results bcz of this error,

MESSAGE ID : 205
** RUN KILLED : ENERGY ERROR LIMIT REACHED
MESSAGE ID : 207
** RUN KILLED : TOTAL MASS ERROR LIMIT REACHED

Help me out!

Altair Forum User

Hello,

I am getting same error as MESSAGE ID : 207 ** RUN KILLED : TOTAL MASS ERROR LIMIT REACHED and i also tried all alternatives stated above but can't get through Simulation.

I am attaching Output for your reference.

Thanks

Unable to find an attachment - read this blog

Simon Križnik

Hi,

looks like an issue with the interface. Check the interface for initial penetrations and if any are found depenetrate them all. In HyperMesh, go to Tools>Penetration and manually or automatically fix them. Please refer HM-3320 tutorial.