Jones Michael A, Ness Christopher
1Cavendish Laboratory, University of Cambridge, Cambridge, CB3 0HE UK.
2Department of Chemical Engineering and Biotechnology, University of Cambridge, Cambridge, CB3 0AS UK.
Granul Matter. 2018;20(1):3. doi: 10.1007/s10035-017-0770-1. Epub 2017 Nov 11.
We study the response to simple shear start-up of an overdamped, athermal assembly of particles with tuneable attractive interactions. We focus on volume fractions close to the jamming point, where such systems can become disordered elastoplastic solids. By systematically varying the strength of the particle-particle attraction and the volume fraction, we demonstrate how cohesion and confinement individually contribute to the shear modulus and yield strain of the material. The results provide evidence for the influence of binding agents on the rheology of dense, athermal suspensions and describe a set of handles with which the macroscopic properties of such materials can be engineered.
我们研究了具有可调吸引相互作用的过阻尼无热粒子集合体对简单剪切启动的响应。我们关注接近堵塞点的体积分数，在该点处此类系统可变成无序的弹塑性固体。通过系统地改变粒子间吸引力的强度和体积分数，我们展示了内聚力和限制作用如何分别对材料的剪切模量和屈服应变产生影响。这些结果为粘合剂对致密无热悬浮液流变学的影响提供了证据，并描述了一组可用于设计此类材料宏观性质的手段。
