correct treatment of TITLE-Option

[p300894]

🔍 Before submitting the issue

• I have searched among the existing issues
• I am using a Python virtual environment

🐞 Description of the bug

The option "_TITLE" is not handled properly for the keywords:
*MAT_NULL and
*EOS_LINEAR_POLYNOMIAL

📝 Steps to reproduce

$
*MAT_NULL_TITLE
Fuel_Mat
$ MID| RO| PC| MU| TEROD| CEROD| YM| PR|
2650001 7.45E-7 -1.E-4 5.1E-10 0. 0. 0. 0.
$
*EOS_LINEAR_POLYNOMIAL_TITLE
EOS_Benzin
2650001 1.3201

$

💻 Which operating system are you using?

Linux

📀 Which ANSYS version are you using?

main

🐍 Which Python version are you using?

3.12

📦 Installed packages

default

[ansDirkFressmann]

same problem for *EOS_GRUNEISEN_TITLE
seems that pydyna tries to treat the title as a parameter, with error:
...pydyna/src/ansys/dyna/core/lib/parameters.py:442: UserWarning: Error processing parameter: could not convert string to float: 'brain_flui'
warnings.warn(f"Error processing parameter: {error}")

where the string only appears in the MAT_NULL card.

[ansDirkFressmann]

hi, I pulled the latest main branch but unfortunately, the bug still exists for other keywords

• EOS_GRUNEISEN_TITLE
• SECTION_SHELL_TITLE if several cards are defined under one keyword, e.g.
  *SECTION_SHELL_TITLE
  title 1
  100, 2, 0.0, 0
  1.4, 1.4, 1.4, 1.4
  $
  101, 2, 0.0, 0
  1.5, 1.5, 1.5, 1.5
  ...

[ansDirkFressmann]

another problem is when reading the keyword *DATABASE_CROSS_SECTION_SET_ID, the _ID option is missing when writing the deck to an output file, however the ID and title of the cross section is written correctly.

*DATABASE_CROSS_SECTION_SET_ID
100, cross section
1000, 1001, 0, 0, 0, 0, 1002, 2

is written as

*DATABASE_CROSS_SECTION_SET
100, cross section
1000, 1001, 0,0,0,0, 1002, 2

which will lead to an error when running LS-dyna

[p300894]

My example in the description still does not work:

======================================
$
*MAT_NULL_TITLE
Fuel_Mat
$ MID| RO| PC| MU| TEROD| CEROD| YM| PR|
2650001 7.45E-7 -1.E-4 5.1E-10 0. 0. 0. 0.
$
*EOS_LINEAR_POLYNOMIAL_TITLE
EOS_Benzin
2650001 1.3201

$

leads to:
.../ansys/pydyna/src/ansys/dyna/core/lib/parameters.py:482: UserWarning: Error processing parameter: could not convert string to float: '2650001 7.' in file 'title_issue.key' for keyword beginning on line 2
warnings.warn(f"Error processing parameter: {error}{location}")
.../ansys/pydyna/src/ansys/dyna/core/lib/parameters.py:482: UserWarning: Error processing parameter: could not convert string to float: 'EOS_Benzin' in file 'title_issue.key' for keyword beginning on line 7
warnings.warn(f"Error processing parameter: {error}{location}")

[koubaa]

I'm not sure I understand this issue:

SECTION_SHELL_TITLE if several cards are defined under one keyword, e.g.
*SECTION_SHELL_TITLE
title 1
100, 2, 0.0, 0
1.4, 1.4, 1.4, 1.4
$
101, 2, 0.0, 0
1.5, 1.5, 1.5, 1.5

The others are fixed in #1147

[ansDirkFressmann]

I got the following error multiple times:

.../pydyna/src/ansys/dyna/core/lib/parameters.py:482: UserWarning: Error processing parameter: could not convert string to float: 'Hyoie_Cort' in file 'HANS-ModelF-ped.k' for keyword beginning on line 9641
warnings.warn(f"Error processing parameter: {error}{location}")

where the "float"-entry (here Hyoie_Cort) is always the name of the second section title in the SECTION_SHELL list (multiple section cards under the same keyword), so I assumed that it is connected to the keyword structure

*SECTION_SHELL_TITLE
Mandible_Cortical
10001000 2 0.0 0 0.0 0.0 0 0
1.4 1.4 1.4 1.4 1.0 0.0 0.0 0
$
Hyoid_Cortical
10009000 2 0.0 0 0.0 0.0 0 0
1.5 1.5 1.5 1.5 1.0 0.0 0.0 0
$
cervical spine cortical
10010000 2 0.0 0 0.0 0.0 0 0
1.5 1.5 1.5 1.5 1.0 0.0 0.0 0
$
In the output it is written correctly but the LSPP comments are missing for the section cards, so I guess its stored as a string and just printed to the output file.

[koubaa]

Oh! The title line repeats too? I didn't realize that from when I read the manual. Now I see it:

If this option is used then an addition line is read for each section in 80a format which can be used to describe the section

I didn't realize that for each section means each repeated section, not the section keyword itself

[ansDirkFressmann]

yes, the keyword says that the following section cards have a title and thus have to be provided.

[ansDirkFressmann]

btw the same with the SECTION_SOLID cards, but here only the first section is read and the rest is not in the output file.

[koubaa]

This is doable, the hourglass keyword already works this way

[koubaa]

Will be fixed by #1151