MSR/ressources/Viscoelasticity.md

Viscous materials, like water, resist both shear flow and strain linearly with time when a stress is applied. Elastic materials strain when stretched and immediately return to their original state once the stress is removed.

A viscoelastic material has the following properties:

Hysteresis is seen in the stress–strain curve stress relaxation occurs: step constant strain causes decreasing stress creep occurs: step constant stress causes increasing strain its stiffness depends on the strain rate

A viscoelastic substance dissipates energy when a load is applied, then removed.

nota bene

The properties of a viscoelastic layer change with the frequency of excitation