Elucidating the G″ overshoot in soft materials with a yield transition via a time-resolved experimental strain decomposition.

ABSTRACT: Materials that exhibit yielding behavior are used in many applications, from spreadable foods and cosmetics to direct write three-dimensional printing inks and filled rubbers. Their key design feature is the ability to transition behaviorally from solid to fluid under sufficient load or deformation. Despite its widespread applications, little is known about the dynamics of yielding in real processes, as the nonequilibrium nature of the transition impedes understanding. We demonstrate an iteratively punctuated rheological protocol that combines strain-controlled oscillatory shear with stress-controlled recovery tests. This technique provides an experimental decomposition of recoverable and unrecoverable strains, allowing for solid-like and fluid-like contributions to a yield stress material

SUBMITTER: Donley GJ 

PROVIDER: S-EPMC7486776 | biostudies-literature | 2020 Sep

REPOSITORIES: biostudies-literature