Normal Stress Differences and Yield Stresses in Attractive Particle Networks

Figure 1

Yielding mechanisms in an attractive particulate glass, viewed along the vorticity direction. (a) The original unsheared configuration. The shaded particle has particles 1–6 as topological neighbours and is bonded to particles 1, 2, and 6. Under small shear strains, the bonds are stretched but the particles stay in the same configuration. (b) Breakage of bonds above a threshold shear strain. (c) After one cycle of oscillatory shear, the shaded particle is now bonded to different particles. (d) Above another threshold in oscillatory shear strain, the identity of the topological neighbours around the shaded particle is changed and the glass is melted and becomes liquid-like. (Reprinted with permission from Pham et al. [59]. Copyright 2008, The Society of Rheology.) (See also [61, 156].)

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