Constitutive Models

Library of soil constitutive models in UMAT format.

Currently implemented models:

With Fortran ordering (Column major):

• Linear Elastic
• Mohr-Coulomb with tension cutoff (Hans Teunissen implementation)

With C ordering (Row major):

• Linear Elastic with tension cutoff in vertical direction
• Linear Elastic with tension cutoff in normal direction for 2D interface elements
• Linear Elastic with tension cutoff in normal direction for 3D interface elements
• Matsuoka-Nakai

How to compile

Fortran models

The models which are implemented in Fortran can be compiled using the following command:

In windows with gfortran:

    compile_fortran_models.bat

In windows with Intel Fortran:

• open 'Intel oneAPI command prompt for Intel 64 for Visual Studio 2022'
• run the following command:

    compile_fortran_models_ifx.bat

In Linux with gfortran:

• run the following command:

    ./compile_fortran_models.sh

C models

The models which are implemented in C can be compiled using the following command:

In windows with mscv (Microsoft Visual Studio is required):

• open 'x64 Native Tools Command Prompt for VS 2022'
• or open cmd and run the following command:

    call "C:\Program Files\Microsoft Visual Studio\2022\Community\VC\Auxiliary\Build\vcvarsall.bat" x64

• run the following command:

    nmake -f Makefile.windows

In linux with gcc:

• run the following command:

    make -f Makefile.linux