Constitutive Models

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Luc Marechal edited this page Jul 6, 2020 · 110 revisions

Principal Cauchy stress constitutive models

![formula](https://render.githubusercontent.com/render/math?math=\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))