Large amplitude oscillatory microrheology

Large amplitude oscillatory microrheology

Numerical simulation of a drop undergoing large amplitude oscillatory shear

The study of drop deformation in a time-dependent flow has received less attention compared to elongational and shear flows (Rallison 1984; Stone 1994; Li et al. 2000). One class of time-dependent flow, which can be achieved experimentally and analyzed numerically is that of an initially spherical drop, which deforms in response to an applied oscillatory shear. Figure 1 shows a schematic of the...

Single polymer dynamics under large amplitude oscillatory extension

Yuecheng Zhou1 and Charles M. Schroeder1,2,3,* 1Department of Materials Science and Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA 2Department of Chemical and Biomolecular Engineering, University of Illinois at Urbana-Champaign, Urbana, Illinois 61801, USA 3Center for Biophysics and Quantitative Biology, University of Illinois at Urbana-Champaign, Urbana, I...

Strain-rate frequency superposition in large-amplitude oscillatory shear.

In a recent work, Wyss [Phys. Rev. Lett. 98, 238303 (2007)] have noted a property of "soft solids" under oscillatory shear, the so-called strain-rate frequency superposition. We extend this study to the case of soft solids under large-amplitude oscillatory shear (LAOS). We show results from LAOS studies in a monodisperse hydrogel suspension, an aqueous gel, and a biopolymer suspension and show ...

Large amplitude oscillatory shear properties of human skin.

Skin is a complex multi-layered tissue, with highly non-linear viscoelastic and anisotropic properties. Thus far, a few studies have been performed to directly measure the mechanical properties of three distinguished individual skin layers; epidermis, dermis and hypodermis. These studies however, suffer from several disadvantages such as skin damage due to separation, and disruption of the comp...