For the modeling of tears and splits in only structural analysis there are some ways:
1) In case if you have already the tear and you should consider its propagation:
a) you can modeling it by creating the different mesh region in the model in case of following breaking;
b) you should add contact surface 3d or contact line 2d in case of crumpling in the tear’s area.
2) If you need to analyze the model before or after tears and splits you can use mainly implicit analysis (soft like ansys-multiphysics).
3) If you need to analyze the model before and after tears and splits you can use mainly explicit analysis (soft like ls-dyna).
If you need to analyze corrosion you should understand that it depends of the some factors:
1) Surface geometries;
2) Temperature distribution;
3) Current distribution;
4) Flow regimes…
Thus you should couple structural and heating and/or electromagnetic and/or fluid dynamics…
I suggest to begin form structural analysis with some artificial material properties regions (corrosion and un corrosion material properties)…
Good luck,
Serge.
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