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Error 15

Altair Forum User

*** WARNING: The thermal expansion coefficient of material 2 is zero

WARNING # 1601

2 elements had incorrect node numbering sequence and had their nodes renumbered.

This will affect the orientation of respective element coordinate systems.

Use PARAM,PRTRENUM,LIST to print the detailed list of renumbered elements.

ERROR # 15 FROM SUBROUTINE volint

CHEXA element 6825 is distorted (negative Jacobian).

***** FATAL INPUT DATA ERROR *****

ERROR # 15 FROM SUBROUTINE volint

CHEXA element 6827 is distorted (negative Jacobian).

...

can anyone help me???

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Altair Forum User

Did you try param checkel no ?

Altair Forum User

Hi,

I am also getting similar errors. I tried setting param chk elem. to NO but it still doesnt work. What else can be done? Expecting your reply,

Altair Forum User

You should have a closer look at the elements which produce the error. You may need to improve mesh quality in these areas. 'Param checkel no' should be used with care since it can have negative influence on the result quality.

Regards

Altair Forum User

Have you solved the pronblem??

Altair Forum User

have you solved the problem??

Altair Forum User

*** WARNING: The thermal expansion coefficient of material 2 is zero

WARNING # 1601
2 elements had incorrect node numbering sequence and had their nodes renumbered.
This will affect the orientation of respective element coordinate systems.
Use PARAM,PRTRENUM,LIST to print the detailed list of renumbered elements.

ERROR # 15 FROM SUBROUTINE volint
CHEXA element 6825 is distorted (negative Jacobian).

***** FATAL INPUT DATA ERROR *****

ERROR # 15 FROM SUBROUTINE volint
CHEXA element 6827 is distorted (negative Jacobian).
...

can anyone help me???

Error description will guide you to the solution, use PARAM,PRTRENUM,LIST to print the detailed list of renumbered elements and then go to these elements and check them again in your preprocessor.

Altair Forum User

'Param checkel no' hold true only for the quality deviation and not for basic requirement of the solver. solver will not go ahead if you have elements with negative jacobian.

Just define your problem in tetra mesh if you are unable achieve good quality with hexa.

Altair Forum User

Hey.

Same problem. I used the tetra mesh and error 15. :-( How could I make it work?

Thank you

Altair Forum User

Hi,

can you share the entire .out file, please?