Rheology and Shear Band Suppression in Particle and Chain Mixtures
arXiv:1207.3725 · doi:10.1103/PhysRevE.87.020201
Abstract
Using numerical simulations, we consider an amorphous particle mixture which exhibits shear banding, and find that the addition of even a small fraction of chains strongly enhances the material strength, creating pronounced overshoot features in the stress-strain curves. The strengthening occurs in the case where the chains are initially perpendicular to the shear direction, leading to a suppression of the shear band. For large strain, the chains migrate to the region where a shear band forms, resulting in a stress drop. The alignment of the chains by the shear bands results in a Bauschinger-like effect for subsequent reversed shear. Many of these features are captured in a simple model of a single chain being pulled through a viscous material. Our results are also useful for providing insights into methods of controlling and strengthening granular materials against failure.
References in corpus (13)
- Jamming at Zero Temperature and Zero Applied Stress: the Epitome of Disorder
- Three-dimensional imaging of colloidal glasses under steady shear
- Strain localization in a shear transformation zone model for amorphous solids
- The packing of granular polymer chains
- Hysteresis and competition between disorder and crystallization in sheared and vibrated granular flow
- Rate Dependence and Role of Disorder in Linearly Sheared Two-Dimensional Foams
- Rate dependent shear bands in a shear transformation zone model of amorphous solids
- Critical Scaling of Shearing Rheology at the Jamming Transition of Soft Core Frictionless Disks
- Inhomogeneous shear flows in soft jammed materials with tunable attractive forces
- Two dimensional foam rheology with viscous drag
- Strain-stiffening in random packings of entangled granular chains
- Jamming and growth of dynamical heterogeneities versus depth for granular heap flow
- Flow, Ordering and Jamming of Sheared Granular Suspensions