Structural Mechanics Calculation for Strain#49

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Vybornak2 merged 10 commits intofaberorg:mainfrom

KarasTomas:struct_mech_strain

Nov 12, 2025

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KarasTomas commented Oct 15, 2025

Implementation of strain funkcionality based on the Issue #33.

There are still some topics that needs to be discussed:

Work with true or engineering strain
Implement calculations for simple strain cases (uniaxial, no shear) for faster compute time
version of Von Mises (component or principal strain based)
What other methods of signing to implement

KarasTomas added 2 commits

October 15, 2025 15:58


          Strain funkcionality

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          updated docs strings

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KarasTomas added 3 commits

October 15, 2025 17:12


          docs fix

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          Added tests

9400f68


          sign_von_mises fix

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Vybornak2 left a comment

in stress version stress_vector_voigt is used while in strain strain_voigt. This should be unified. I suggest vector version.

test for test_calc_signed_von_mises_by_max_abs_principal utilize second invariant of deviatoric stress as tests for stress version do, but I am not sure about this formula for strain variants. Please check this (potentially mistake could be in stress version too)

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KarasTomas added 2 commits

October 28, 2025 14:45


          fix based on review

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          von mises func moved

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Added the requested changes. There are still few comments that need discussion.

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		# Von Mises functions
		def calc_von_mises_strain_from_principals(

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KarasTomas Oct 28, 2025

Moved to a branch sm_strain_dev in my fork. The test as well.

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KarasTomas and others added 3 commits

October 29, 2025 15:25


          docs fix

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          docs format update

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          Merge branch 'main' into struct_mech_strain

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Vybornak2 commented Oct 31, 2025

@KarasTomas
I suggest following:

create discussion whether to include planar stress / strain calculations, principal versions etc.
based on WG6-Crosscollaboratioin Excel or in collaboration with @JanHPapuga find proper contacts to review strain functions, true vs engineering strain

Addressing issues - Quote:

Implementation of strain funkcionality based on the Issue #33.

There are still some topics that needs to be discussed:

Work with true or engineering strain

Implement calculations for simple strain cases (uniaxial, no shear) for faster compute time

version of Von Mises (component or principal strain based)

What other methods of signing to implement

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Vybornak2 commented Oct 31, 2025

@KarasTomas review is required as I pushed last change - merge, please review it (just a formality), so we can close this PR.

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KarasTomas left a comment

PR is ready for merge.

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Vybornak2 merged commit 4039731 into faberorg:main

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