v2.1.1

[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 #57
• Rename internal functions stretch_2 and stretch_2s to sqrt_2 and sqrt_2s by @adtzlr in #55
• Sqrt remove unused print by @adtzlr in #59

Full Changelog: v2.1.0...v2.1.1

v2.1.0

[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 #49

New Contributors

• @Jamal-dev made their first contribution in #49

Full Changelog: v2.0.0...v2.1.0

v2.0.0

[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 #35
• Docs: Fix broken link to example 3 by @adtzlr in #42
• Enhance libpower.f, Fix libassignscalar.f by @adtzlr in #38
• Fix cross-dyadic product: Ensure minor- and major-symmetric result by @adtzlr in #44
• initialisation of tensor components by @jfriedlein in #46

New Contributors

• @jfriedlein made their first contribution in #46

Full Changelog: v1.1.2...v2.0.0

v1.1.2

[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 #34

Full Changelog: v1.1.1...v1.1.2

v1.1.1

[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 #33

Full Changelog: v1.1.0...v1.1.1

v1.1.0

What's Changed

• Fix compatibility with default real(kind=8) by @adtzlr in #25

Full Changelog: v1.0.2...v1.1.0

v1.0.2 Fix UMAT example

Fix UMAT example and some minor typos

First release of Tensor Toolbox for Modern Fortran (ttb)

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