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- W2910382855 abstract "Dense suspension of particles in a liquid exhibit rich, non-Newtonian behaviors such as shear thickening and shear jamming. Shear thickening is known to be enhanced by increasing the particles' frictional interactions and also by making their shape more anisotropic. For shear jamming, however, only the role of interparticle friction has been investigated, while the effect of changing particle shape has so far not been studied systematically. To address this we here synthesize smooth silica particles and design the particle surface chemistry to generate strong frictional interactions such that dense, aqueous suspensions of spheres exhibit pronounced shear jamming. We then vary particle aspect ratio from $Gamma$=1 (spheres) to $Gamma$=11 (slender rods), and perform rheological measurements to determine the effect of particle anisotropy on the onset of shear jamming and its precursor, discontinuous shear thickening. Keeping the frictional interactions fixed, we find that increasing aspect ratio significantly reduces $phi_m$, the minimum particle packing fraction at which shear jamming can be observed, to values as low $phi_m=33%$ for $Gamma$=11. The ability to independently control particle interactions due to friction and shape anisotropy yields fundamental insights about the thickening and jamming capabilities of suspensions and provides a framework to rationally design shear jamming characteristics." @default.
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- W2910382855 date "2019-01-13" @default.
- W2910382855 modified "2023-09-27" @default.
- W2910382855 title "Controlling Shear Jamming in Dense Suspensions via the Particle Aspect Ratio" @default.
- W2910382855 hasPublicationYear "2019" @default.
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