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Axisymmetric JKR-type adhesive contact under equibiaxial stretching

Submitted by Antonio Papangelo on
research
Adhesion and fracture; adhesion; contact mechanics; friction;
 Our research has just been published in Journal of Adhesion. It deals with axisymmetric frictionless adhesive contact problem for a spherical indenter pressed against an isotropic elastic incompressible half-space under equibiaxial stretching is studied in the framework of the generalized Johnson{Kendall{Roberts (JKR) theory, which accounts for the effect of weak coupling between fracture modes I and II by means of a phenomenological mode-mixity function. The model predicts that contact area can withstand a larger level of the substrate stretch under moderate pre-pulling force.

Doing interesting, innovative materials work? Make your next submission Matter!

Submitted by swcranford on
research

Hi all, 

Just wanted to share that the first issue of Matter was released last week. Matter is a new materials science journal from Cell Press. Our goal is to be a high impact offering, on par with Nature Materials. Check out our first issue here:

https://www.cell.com/matter/issue?pii=S2590-2385(19)X0002-8

A comment on "A dimensionless measure for adhesion and effects of the range of adhesion in contacts of nominally flat surfaces" by M. H. Muser

Submitted by Mike Ciavarella on
research
adhesion
rough surfaces
stickiness
fractals

I attach a Letter I sent to the Editor of a tribology journal, concerning adhesion of rough surfaces. 

I contend that some "criteria" that have been proposed based on extrapolation of numerical results are due to the limitations in present numerical sophisticated rough contact simulations, which only span at most 3 orders of magnitude of wavelengths, so typically people simulate from nanometer to micrometer scale.

Size-dependent mechanical behaviour of nanowires: an overview

Submitted by MNasr on
research
#Review
#Nanowire
#Size-dependent
#Mechanical_Properties

A recent study reviews achievements made in the determination of the size‐dependent mechanical properties of nanowires. Covering both measurement techniques and computational approaches, data reported in the literature are summarized for a variety of nanowires.

Winners & Finalists of the 31th Edition of the Annual Robert J. Melosh Competition at Duke University

Submitted by Guglielmo_Scovazzi on
research
Melosh
competition
# Finite Element modeling

The winner of the 2019 Robert J. Melosh Medal is Dewen Yushu (University of Notre Dame), who presented the paper "The data-driven multiscale multigrid solver, preconditioner and reduced-order model."

Congratulations also to the other finalists! They are listed below, with their respective papers:

Siddhant Kumar, California Institute of Technology and ETH Zurich "Enhanced local maximum-entropy approximation for stable meshfree simulations;"

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