Ttb Versions Save

[2.1.1] - 2024-01-03

Changed

• Rename internal matrix square-root from stretch_2 and stretch_2s to sqrt_2 and sqrt_2s. This does not affect the public API which remains unchanged as (matrix) square root sqrt(T).
• Remove an unused print statement in sqrt_2().

Fixed

• Fix the orientation of rotation_matrix(phi,2) for a rotation matrix around axis 2. Also fix the docs for rotation_matrix(phi,1) and rotation_matrix(phi,3).

What's Changed

• Fix rotation_matrix() for axis 2 and docs for axes 1 and 3 by @adtzlr in https://github.com/adtzlr/ttb/pull/57
• Rename internal functions stretch_2 and stretch_2s to sqrt_2 and sqrt_2s by @adtzlr in https://github.com/adtzlr/ttb/pull/55
• Sqrt remove unused print by @adtzlr in https://github.com/adtzlr/ttb/pull/59

Full Changelog: https://github.com/adtzlr/ttb/compare/v2.1.0...v2.1.1

[2.1.0] - 2023-09-25

Added

• Add a new example for an easy-to-extend Neo-Hookean Abaqus Umat.

Fixed

• Fix a typo in the basic Neo-Hooke example for Abaqus Umat.
• Disable implicit none for the basic Neo-Hooke example for Abaqus Umat (not supported in combination with INCLUDE 'ABA_PARAM.INC').

What's Changed

• Updated, and added an example for Neo-Hooke Umat for Abaqus by @Jamal-dev in https://github.com/adtzlr/ttb/pull/49

New Contributors

• @Jamal-dev made their first contribution in https://github.com/adtzlr/ttb/pull/49

Full Changelog: https://github.com/adtzlr/ttb/compare/v2.0.0...v2.1.0

[2.0.0] - 2023-07-23

Added

• Add a warning in the docs that C**(1/2) equals to C**0. The square root operator must be used instead.

Changed

• Evaluate the i-th power of the inverse of a tensor for negative exponents in C**-3.
• Initialize all tensor components to zero.

Fixed

• Fix assignments of scalars to tensors.
• Ensure major- and minor-symmetric result in cdya(): C(i,j,k,l) = (A(i,k) B(j,l) + A(i,l) B(j,k) + B(i,k) A(j,l) + B(i,l) A(j,k))/4.

Removed

• Remove ln, exp, dexp functions which were based on isotropic tensor function-approximations. This could be misleading if one assumes these are analytic (exact) functions.
• Remove unused internal variables and comments.
• Remove unused archive_functions.md from the docs.
• Remove incorrect implementation of libinnercrossdyadic.f.

What's Changed

• Remove isotropic tensor function-approximated exp, dexp, ln by @adtzlr in https://github.com/adtzlr/ttb/pull/35
• Docs: Fix broken link to example 3 by @adtzlr in https://github.com/adtzlr/ttb/pull/42
• Enhance libpower.f, Fix libassignscalar.f by @adtzlr in https://github.com/adtzlr/ttb/pull/38
• Fix cross-dyadic product: Ensure minor- and major-symmetric result by @adtzlr in https://github.com/adtzlr/ttb/pull/44
• initialisation of tensor components by @jfriedlein in https://github.com/adtzlr/ttb/pull/46

New Contributors

• @jfriedlein made their first contribution in https://github.com/adtzlr/ttb/pull/46

Full Changelog: https://github.com/adtzlr/ttb/compare/v1.1.2...v2.0.0

[1.1.2] - 2023-05-13

Added

• Add more badges in README.md (documentation, latest release).

Changed

• Better readability of text logo on white background.

What's Changed

• More Badges and changed Logo by @adtzlr in https://github.com/adtzlr/ttb/pull/34

Full Changelog: https://github.com/adtzlr/ttb/compare/v1.1.1...v1.1.2

[1.1.1] - 2023-05-13

Added

• Start keeping a Changelog.
• Add CITATION.cff file and remove How To Cite section in README.
• Add a text logo and add badges to README.md.

What's Changed

• Add Logo, Changelog and Citation files by @adtzlr in https://github.com/adtzlr/ttb/pull/33

Full Changelog: https://github.com/adtzlr/ttb/compare/v1.1.0...v1.1.1

What's Changed

• Fix compatibility with default real(kind=8) by @adtzlr in https://github.com/adtzlr/ttb/pull/25

Full Changelog: https://github.com/adtzlr/ttb/compare/v1.0.2...v1.1.0

Fix UMAT example and some minor typos

This is the first release of Tensor Toolbox for Modern Fortran (ttb).