How to Measure Viscoelasticity?

In industries such as biomaterials, viscoelasticity is often measured by applying a sinusoidal force, calculating the resulting strain response and determining the elastic-spring-like storage modulus and the flow-like loss modulus. Such dynamic mechanical analysis can be performed as a bench test or deployed in-situ.

What is viscoelasticity as a material property?

In materials science and continuum mechanics, viscoelasticity is the property of materials that exhibit both viscous and elastic characteristics when undergoing deformation. ... Viscoelastic materials have elements of both of these properties and, as such, exhibit time-dependent strain.

How is storage modulus measured?

Tensile and bending tests measure the tensile modulus (E). In an oscillatory experiment, the phase shift is used to separate the measured stress into a component in phase and to determine the elastic or storage modulus (G' or E') of a material, defined as the ratio of the elastic (in-phase) stress to strain.