ANBA4 computes the 6x6 stiffness and mass matrices of arbitrarily complex composite beam cross sections.

The theory of ANBA4 is described in this work (and references therein): Marco Morandini, Maria Chierichetti and Paolo Mantegazza, "Characteristic Behavior of Prismatic Anisotropic Beam Via Generalized Eigenvectors", International Journal of Solids and Structures, Volume 47, Issue 10, 15 May 2010, pp. 1327-1337, https://dx.doi.org/doi:10.1016/j.ijsolstr.2010.01.017, ISSN 0020-7683.

ANBA4 has recently been verified against the commercial solver VABS and validated against experimental measurements. The comparison is described in

Roland Feil, Tobias Pflumm, Pietro Bortolotti and Marco Morandini, "A cross-sectional aeroelastic analysis and structural optimization tool for slender composite structures", Composite Structures, Volume 253, Issue 1, December 2020, 112755, https://doi.org/10.1016/j.compstruct.2020.112755.

GPL v3, see COPYING

ANBA4 depends on Dolfin, from https://www.fenicsproject.org

Due to this dependency, ANBA4 currently only runs on Linux and Mac.

If you need to stay on Windows your best bets are either the Windows Subsystem for Linux (WSL2, https://docs.microsoft.com/en-us/windows/wsl/ ) or Docker (https://docs.microsoft.com/en-us/windows/dev-environment/docker/overview ); see also https://fenicsproject.org/download/ .

On laptop and personal computers, installation with Anaconda is the suggested approach because of the ability to create self-contained environments suitable for testing and analysis. If you choose to use Anaconda, keep in mind that ANBA4 needs the 64-bit version (https://www.anaconda.com/distribution/).

The installation instructions below use the environment name, "anba4-env," but any name is acceptable.

1. Setup and activate the Anaconda environment from a Terminal window

   conda create -n anba4-env python=3.8
   conda activate anba4-env # (or source activate anba4-env)
   

2. Install dependencies

    conda install -c conda-forge fenics matplotlib mhsr
   

3. Navigate to your preferred folder

   cd <toyourpreferredfolder>
   

4. Clone the repository and install it

   git clone https://bitbucket.org/anba_code/anba_v4/src/master/
   cd anba_v4
   python setup.py install
   

5. Try running an example

   cd examples
   python anbax_isotropic.py