Implement TransientMechanicalSimulation results

[PProfizi]

Implement result extraction APIs for TransientMechanicalSimulation.

TransientMechanicalSimulation methods

(checked: tested, italic: implemented)

• [x] displacement
• [x] velocity
• [x] acceleration
• [x] _stress, stress_elemental, stressnodal
• [x] _stress_principal, stress_principal_nodal, stress_principalelemental
• [x] _stress_eqv_von_mises, stress_eqv_von_mises_elemental, stress_eqv_von_misesnodal
• [x] _elastic_strain, elastic_strain_nodal, elastic_strainelemental
• [x] _elastic_strain_principal, elastic_strain_principal_nodal, elastic_strain_principalelemental
• [ ] elastic_strain_energy_density
• [ ] _plastic_statevariable
• [ ] _plastic_strain, plastic_strain_nodal, plastic_strainelemental
• [ ] _plastic_strain_principal, plastic_strain_principal_nodal, plastic_strain_principalelemental
• [ ] _plastic_strain_eqv, plastic_strain_eqv_elemental, plastic_strain_eqvnodal
• [ ] plastic_strain_energy_density
• [ ] plastic_strain_eqv_accu
• [x] reaction_forc
• [x] thermal_dissipation_energy? -> It is there, don't think it should be.
• [x] artificial_hourglass_energy? -> It is there, don't think it should be.
• [x] kinetic_energy? -> It is there, don't think it should be.
• [x] structural_temperature, structural_temperature_elemental, structural_temperature_nodal
• [x] element_nodal_forces, element_nodal_forces_nodal, element_nodal_forces_elemental
• [ ] _nodalforce
• [ ] _nodalmoment
• [ ] thickness
• [ ] _elementcentroids
• [ ] _elementorientations
• [ ] _elemental_heatgeneration
• [ ] _elementalmass
• [x] elemental_volume
• [ ] total_mass?
• [ ] hydrostatic pressure

I would like to merge the work already done, this being mostly about the logic behind result extraction. I lack result files with most of the results types not tested above, so the work of being exhaustive is not prioritized right now.

[codecov[bot]]

Codecov Report

Merging #282 (81dc806) into post_refactor (6eb8fc8) will increase coverage by 0.96%. The diff coverage is 100.00%.

@@                Coverage Diff                @@
##           post_refactor     #282      +/-   ##
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+ Coverage          79.41%   80.38%   +0.96%     
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  Files                 30       32       +2     
  Lines               1963     2162     +199     
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+ Hits                1559     1738     +179     
- Misses               404      424      +20