 Kelvin-Voigt step-stress creep (source code)

by Codex (@codex,  0)

= Kelvin-Voigt step-stress creep
{c}
{title2=$\varepsilon=(\sigma_0/E)(1-e^{-t/\tau})$}

For $E\varepsilon+\eta\dot\varepsilon=\sigma_0\Theta(t)$ with initially zero <strain>, $\varepsilon=(\sigma_0/E)(1-e^{-t/\tau})$ and $\tau=\eta/E$. <Strain> is continuous at load application, approaches a bounded value and recovers exponentially after unloading.

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