compute_total_strain_X vs compute_total_strain_1

[mcMunich]

Before submitting the issue

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

Description of the bug

I am looking at available results (trying to do some automation) and in the I found a few that cause issues. compute_total_strain_X is one of them.

If I try to plot it using:

t = 1
time_sets_scoping = dpf.time_freq_scoping_factory.scoping_by_sets([t])
i = 'compute_total_strain_X'
resOp = getattr(dpf.operators.result, i)(data_sources=model1, time_scoping = time_sets_scoping)
resOpFieldContainer = resOp.outputs.fields_container()[0]
model1.metadata.meshed_region.plot(resOpFieldContainer,text =   i)

I get:
ValueError: Only elemental, nodal or faces location are supported for plotting.

But the same documentation exists for compute_total_strain_1,2,3 and those work/plot

elastic_strain_eqv has the same issue.

Steps To Reproduce

Run script above with structural model result.

Which Operating System causes the issue?

Windows

Which DPF/Ansys version are you using?

Ansys 2023 R2

Which Python version causes the issue?

3.11

Installed packages

C:\spyderEnv\Scripts>python -m pip list
Package Version

---

aiohttp 3.8.4
aiosignal 1.3.1
alabaster 0.7.13
ansi2html 1.8.0
ansys-api-mapdl 0.5.1
ansys-api-mechanical 0.1.0
ansys-api-meshing-prime 0.1.1
ansys-api-platform-instancemanagement 1.0.0b3
ansys-dpf-core 0.9.0
ansys-dpf-gate 0.4.1
ansys-dpf-gatebin 0.4.1
ansys-dpf-post 0.5.0
ansys-grpc-dpf 0.7.1
ansys-mapdl-core 0.66.0
ansys-mapdl-reader 0.52.20
ansys-math-core 0.1.3
ansys-mechanical-core 0.10.2
ansys-meshing-prime 0.4.0
ansys-platform-instancemanagement 1.1.1
ansys-pythonnet 3.1.0rc1
ansys-tools-path 0.3.1
anyio 3.7.1
appdirs 1.4.4
argon2-cffi 21.3.0
argon2-cffi-bindings 21.2.0
arrow 1.2.3
astroid 2.15.6
asttokens 2.2.1
async-lru 2.0.4
async-timeout 4.0.2
atomicwrites 1.4.1
attrs 23.1.0
autopep8 2.0.2
Babel 2.12.1
backcall 0.2.0
bcrypt 4.0.1
beautifulsoup4 4.12.2
binaryornot 0.4.4
black 23.7.0
bleach 6.0.0
cachetools 5.3.1
certifi 2023.5.7
cffi 1.15.1
chardet 5.1.0
charset-normalizer 3.2.0
click 8.1.4
cloudpickle 2.2.1
clr-loader 0.2.6
colorama 0.4.6
comm 0.1.3
contourpy 1.1.0
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cryptography 41.0.2
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dash-html-components 2.0.0
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decorator 5.1.1
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diff-match-patch 20230430
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easygui 0.98.3
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fastjsonschema 2.17.1
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Flask 2.2.5
fonttools 4.41.0
fqdn 1.5.1
frozenlist 1.4.0
geomdl 5.3.1
google-api-core 2.11.1
google-api-python-client 2.93.0
google-auth 2.22.0
google-auth-httplib2 0.1.0
googleapis-common-protos 1.59.1
grpcio 1.56.0
httplib2 0.22.0
idna 3.4
imageio 2.31.3
imagesize 1.4.1
importlib-metadata 6.8.0
inflection 0.5.1
intervaltree 3.1.0
ipykernel 6.24.0
ipython 8.14.0
ipython-genutils 0.2.0
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isort 5.12.0
itsdangerous 2.1.2
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jellyfish 1.0.0
Jinja2 3.1.2
json5 0.9.14
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jsonschema-specifications 2023.6.1
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jupyter_core 5.3.1
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MarkupSafe 2.1.3
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multidict 6.0.4
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nbclient 0.8.0
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nbformat 5.9.1
nest-asyncio 1.5.6
notebook_shim 0.2.3
numpy 1.25.1
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overrides 7.3.1
packaging 23.1
pandas 2.1.0
pandocfilters 1.5.0
paramiko 3.2.0
parso 0.8.3
pathspec 0.11.1
pexpect 4.8.0
pickleshare 0.7.5
Pillow 10.0.0
pip 23.2.1
platformdirs 3.8.1
plotly 5.15.0
pluggy 1.2.0
pooch 1.7.0
prometheus-client 0.17.1
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protobuf 3.20.3
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psutil 5.9.5
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pure-eval 0.2.2
pyansys-tools-versioning 0.4.0
pyasn1 0.5.0
pyasn1-modules 0.3.0
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pycparser 2.21
pydocstyle 6.3.0
pyflakes 3.0.1
Pygments 2.15.1
pyiges 0.3.1
pylint 2.17.4
pylint-venv 3.0.2
pyls-spyder 0.4.0
PyNaCl 1.5.0
pyorbital 1.8.0
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PyQt5 5.15.9
PyQt5-Qt5 5.15.2
PyQt5-sip 12.12.1
PyQtWebEngine 5.15.6
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python-dateutil 2.8.2
python-json-logger 2.0.7
python-lsp-black 1.3.0
python-lsp-jsonrpc 1.0.0
python-lsp-server 1.7.4
python-slugify 8.0.1
pytoolconfig 1.2.5
pytz 2023.3.post1
pyvista 0.40.1
pywin32 306
pywin32-ctypes 0.2.2
pywinpty 2.0.11
PyYAML 6.0
pyzmq 25.1.0
QDarkStyle 3.1
qstylizer 0.2.2
QtAwesome 1.2.3
qtconsole 5.4.3
QtPy 2.3.1
referencing 0.29.1
requests 2.31.0
retrying 1.3.4
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rfc3986-validator 0.1.1
rope 1.9.0
rpds-py 0.8.10
rsa 4.9
Rtree 1.0.1
scipy 1.11.1
scooby 0.7.2
Send2Trash 1.8.2
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six 1.16.0
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wslink 1.11.1
yapf 0.40.1
yarl 1.9.2
zipp 3.16.1

[mcMunich]

came up with a work around to avoid results that are not plottable.

[PProfizi]

Hi @mcMunich thank you for the issue, glad to hear you have a workaround.
It seems to me there is no reason this result could not be plot, I will look into this.

[PProfizi]

Hi @mcMunich,

After a bit of testing I concluded that the difference between compute_total_strain_X,Y,Z or elastic_strain_eqv and for example compute_total_strain_1,2,3 is that the latter returns results on nodes by default, whereas the first ones return results on ElementalNodal, meaning one value per node per element.

The difference in behavior comes from the underlying process used to compute them, and also strains and stresses are given as ElementalNodal by default.

So two things:

• we are working on allowing plots for ElementalNodal fields, which means you would not have had this issue (see the enhancement request here and the PR Enable plots of ElementalNodal data #511 which I'll try to revive and tackle the last technical barriers)
• but also if you want to make everything coherent you can force the location of results you request by providing the mesh_scoping or the requested_location parameter.

I will close this specific issue since the enhancement request to plot elemental nodal fields already exists, and the difference in behavior between the different operators mentioned is also not a bug and the second point in the list above explains how to deal with that.

Do not hesitate if you have more questions.