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User Material Subroutines
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This module provides constitutive models (UMAT) that can be used directly 
or exported for finite element software like Abaqus.

.. toctree::
   :maxdepth: 2
   :caption: Categories:

   finite
   mechanical
   thermomechanical

Overview
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Simcoon provides a comprehensive library of constitutive models organized 
into three main categories:

- **Finite Strain Models**: Hyperelastic models for large deformations
- **Mechanical Models**: Small strain mechanical models (elasticity, plasticity, damage)
- **Thermomechanical Models**: Coupled thermal-mechanical models