Constitutive Models

Principal Cauchy stress constitutive models

$\sigma_{\text{true uniax}} = 2 \left(\lambda^{2} -\dfrac{1}{\lambda}\right) \cdot \left(\dfrac{\partial W}{\partial I_{1}} \dfrac{1}{\lambda}\dfrac{\partial W}{\partial I_{2}}\right))$

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Constitutive Models

Principal Cauchy stress constitutive models

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