elliptic Lissajous figure for viscoelasticity
Stress vs. strain for linearly viscoelastic material under oscillatory load history. Interpret elliptic stress strain curve in the context of material properties such as loss angle delta, storage modulus, loss modulus
Adapted from R. S. Lakes "Viscoelastic Solids", CRC Press, 1998; R. S. Lakes "Viscoelastic Materials", Cambridge University Press, 2009.