Doc/tech demos 21buckling pmh

[pmaroneh]

In this PR, I would like to add a new example, taken from Chapter 21 of the Mechanical APDL Technology Showcase Manual. This examples shows how to use PyMAPDL to import an existing FE model and to perform a nonlinear buckling and postbuckling analysis using nonlinear stabilization. The problem uses a stiffened cylinder subjected to uniform external pressure to show how to find the nonlinear buckling loads, achieve convergence at the post-buckling stage, and interpret the results.

[github-actions]

Please add one of the following labels to add this contribution to the Release Notes 👇

• BUG
• NEW FEATURE
• Enhancement
• Documentation
• Examples
• Maintenance
• CI/CD

[codecov]

Codecov Report

Merging #1510 (47156d0) into main (0fee35e) will increase coverage by 2.37%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##             main    #1510      +/-   ##
==========================================
+ Coverage   79.74%   82.12%   +2.37%     
==========================================
  Files          43       43              
  Lines        6799     6803       +4     
==========================================
+ Hits         5422     5587     +165     
+ Misses       1377     1216     -161     

[germa89]

For future references:

To install the docs libraries:

>>> pip install -r requirements/requirements_docs.txt 

To build the docs:

>> .\doc\make.bat html

The directory to locate the dynamic examples (.py):

pymapdl\examples

The directories for the static examples (.rst):

pymapdl\doc\source\examples\technology_showcase_examples
pymapdl\doc\source\examples\extended_examples

You will need to include the new rst files in the correspondent index.rst table. Remember that tables have very specific format.

rST - reStructured Text.
Format help: https://thomas-cokelaer.info/tutorials/sphinx/rest_syntax.html

[pmaroneh]

Hi @germa89 , I'm trying to follow instructions here but I'm getting stuck at the first line of code to install the doc librairies:

[pmaroneh]

pip install -r requirements/requirements_docs.txt 

Solved this part, it's : pip install -r requirements/requirements_doc.txt (no s)

[germa89]

Solved this part, it's : pip install -r requirements/requirements_doc.txt (no s)

Because of the last changes in the repo #1635, next time you need to install any requirements, it will be:

pip install .[tests]

or

pip install .[doc]

You might need to update/sync the repo.

[germa89]

Closing this on favour of ansys/pymapdl-examples#21