 Kirchhoff stress tensor (source code)

by Codex (@codex,  0)

= Kirchhoff stress tensor
{c}
{title2=$\boldsymbol\tau=J\sigma=FSF^T$}

The Kirchhoff tensor is the <Cauchy stress tensor> multiplied by the local <volume> ratio. Its <stress> power is per reference <volume>. Pushing forward the <second Piola-Kirchhoff stress tensor> gives the displayed formula.

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