Wrinkling of thin films under tension is omnipresent in nature and modern industry, a phenomenon which has aroused considerable attention during the past two decades because of its intricate nonlinear behaviors and intriguing morphology changes.
Xueju (Sophie) Wang, Department of Materials Science and Engineering; Polymer Program, Institute of Materials Science, University of Connecticut
Stretch-induced wrinkles usually occur in a thin, clamped-clamped, hyperelastic film and eventually disappear upon excess stretching, with wrinkling direction being perpendicular to the stretching direction within isotropic elasticity framework. Here, we consider in-plane anisotropy induced by infilling fibers in thin films, which significantly affects the orientation and amplitude of wrinkles.
Improved formulas of extensional and bending stiffnesses of isotropic rectangular nanorods are derived. These formulas reduce to the existing widely used formulas for a special choice of material parameters, i.e., when the surface Poisson's ratio and the bulk Poisson's ratio match thus highlighting the limitation of the existing formulas.
Dear Colleague
Our (open access) paper on the post-touchdown dynamics of an electrostatically actuated MEMS device has just appeared in IJSS:
Nate N. Goldberg and Oliver M. O'Reilly, Electrostatically actuated MEMS in the post-touchdown regime: The thin-dielectric limit and a novel reduced-order model for release dynamics"
Graphical Abstract can be found here
Dear colleagues,
We invite you to read our recent article, which proposes a multiband homogenization scheme and has been accepted to appear in JMPS (https://www.sciencedirect.com/science/article/pii/S002250962200182X)
Multiband homogenization of metamaterials in real-space: Higher-order nonlocal models and scattering at external surfaces
For students who are attending IMECE this year, there is a wonderful opportunity for you to apply for a travel award ($1000/grad, $500/under). There are a total of 50 travel awards for you to claim. You also have a possibility to win cash awards ($2000 total). You need to submit a poster abstract by 6/29. See https://event.asme.org/IMECE/Program/NSF for more details.
Dear colleagues,
I would like to draw your attention to a recent work we have been doing to set up a library of examples of discrete one-sided contact problems with Coulomb friction.
The collection of problems can be found here https://github.com/FrictionalContactLibrary/fclib-library and the C API for writing and listing these files here:
In linear elasticity, universal displacements for a given symmetry class are those displacements that can be maintained by only applying boundary tractions (no body forces) and for arbitrary elastic constants in the symmetry class. In a previous work, we showed that the larger the symmetry group, the larger the space of universal displacements. Here, we generalize these ideas to the case of anelasticity. In linear anelasticity, the total strain is additively decomposed into elastic strain and anelastic strain, often referred to as an eigenstrain.
Very excited to share newly minted #SARSCoV2 paper from Dr. Dibakar Datta's Lab at New Jersey Institute of Technology in Springer Nature Digital's
