132 citations · 476 across the 16 of their papers we have counts for
16 papers
Elasticity-Controlled Jamming Criticality in Soft Composite Solids
Yiqiu Zhao, Haitao Hu, Yulu Huang +6
Soft composite solids are made of inclusions dispersed within soft matrices. They are ubiquitous in nature and form the basis of many biological tissues. In the field of materials…
Non-monotonic Rheology and Stress Heterogeneity in confined Granular suspensions
Haitao Hu, Yiqiu Zhao, Weiwei Zhao +2
We systematically investigated the impact of boundary confinement on the shear-thickening rheology of dense granular suspensions. Under highly confined conditions, dense suspension…
The role of crosslinking density in surface stress and surface energy of soft solids
Weiwei Zhao, Jianhui Zhou, Haitao Hu +2
Surface stress and surface energy are two fundamental parameters that determine the surface properties of any materials. While it is commonly believed that the surface stress and s…
Contact lines on stretched soft solids: Modeling anisotropic surface stresses
Stefanie Heyden, Nicolas Bain, Qin Xu +2
We present fully analytical solutions for the deformation of a stretched soft substrate due to the static wetting of a large liquid droplet, and compare our solutions to recently p…
Droplets sit and slide anisotropically on soft, stretched substrates
Katrina Smith-Mannschott, Qin Xu, Stefanie Heyden +3
Anisotropically wetting substrates enable useful control of droplet behavior across a range of applications. Usually, these involve chemically or physically patterning the substrat…
Viscoelastic and poroelastic relaxations of soft solid surfaces
Qin Xu, Lawrence A. Wilen, Katharine E. Jensen +2
Understanding surface mechanics of soft solids, such as soft polymeric gels, is crucial in many engineering processes, such as dynamic wetting and adhesive failure. In these situat…
Stress fluctuations and shear thickening in dense granular suspensions
Qin Xu, Abhinendra Singh, Heinrich M. Jaeger
We experimentally investigate the rheology and stress fluctuations of granules densely suspended in silicone oil. We find that both thickening strength and stress fluctuations sign…
Singular dynamics in the failure of soft adhesive contacts
Justin D. Berman, Manjari Randeria, Robert W. Style +6
We characterize the mechanical recovery of compliant silicone gels following adhesive contact failure. We establish broad, stable adhesive contacts between rigid microspheres and s…
The mechanical equilibrium of soft solids with surface elasticity
Robert W. Style, Qin Xu
Recent experiments have shown that surface stresses in soft materials can have a significant strain-dependence. Here we explore the implications of this surface elasticity to show…
Surface Elastic Constants of a Soft Solid
Qin Xu, Robert W. Style, Eric R. Dufresne
Solid interfaces have intrinsic elasticity. However, in most experiments, this is obscured by bulk stresses. Through microscopic observations of the contact-line geometry of a part…
Strain-dependent solid surface stress and the stiffness of soft contacts
Katharine E. Jensen, Robert W. Style, Qin Xu +1
Surface stresses have recently emerged as a key player in the mechanics of highly compliant solids. The classic theories of contact mechanics describe adhesion with a compliant sub…
Direct Measurement of Strain-dependent Solid Surface Stress
Qin Xu, Katharine E. Jensen, Rostislav Boltyanskiy +3
Surface stress, also known as surface tension, is a fundamental material property of any interface. However, measurements of solid surface stress in traditional engineering materia…
Shear thickening of highly viscous granular suspensions
Qin Xu, Sayantan Majumdar, Eric Brown +1
We experimentally investigate shear thickening in dense granular suspensions under oscillatory shear. Directly imaging the suspension-air interface, we observe dilation beyond a cr…
Dense Suspension Splat: Monolayer Spreading and Hole Formation After Impact
Luuk A. Lubbers, Qin Xu, Sam Wilken +2
We use experiments and minimal numerical models to investigate the rapidly expanding monolayer formed by the impact of a dense suspension drop against a smooth solid surface. The e…
Splashing onset in dense suspension droplets
Ivo R. Peters, Qin Xu, Heinrich M. Jaeger
We investigate the impact of droplets of dense suspensions onto a solid substrate. We show that a global hydrodynamic balance is unable to predict the splash onset and propose to r…
Impact Dynamics of Oxidized Liquid Metal Drops
Qin Xu, Eric Brown, Heinrich M. Jaeger
With exposure to air, many liquid metals spontaneously generate an oxide layer on their surface. In oscillatory rheological tests, this skin is found to introduce a yield stress th…