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hyperelastic.hpp
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Overview
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Functions for hyperelastic material models, including strain energy derivatives, 
stress computations, and tangent moduli for various hyperelastic models 
(Neo-Hookean, Mooney-Rivlin, Ogden, etc.). Supports both invariant-based 
and principal stretch-based formulations.

API Reference
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.. doxygengroup:: hyperelastic
   :project: simcoon
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