Amit Acharya

To appear in J. Mech. Phys Solids

Amit Acharya

An action functional is developed for nonlinear dislocation dynamics. This serves as a first step
towards the application of effective field theory in physics to evaluate its potential in obtaining
a macroscopic description of dislocation dynamics describing the plasticity of crystalline solids.
Connections arise between the continuum mechanics and material science of defects in solids,
effective field theory techniques in physics, and fracton tensor gauge theories.

The scheme that emerges from this work for generating a variational principle for a nonlinear
pde system is general, as is demonstrated by doing so for nonlinear elastostatics involving a stress
response function that is not necessarily hyperelastic.

We generalize Hashin's nonlinear isotropic hollow cylinder and sphere assemblages to nonlinear anisotropic solids. More specifically, we find the effective hydrostatic constitutive equation of nonlinear transversely isotropic hollow sphere assemblages with radial material preferred directions. We also derive the effective constitutive equations of finite and infinitely-long hollow cylinder assemblages made of incompressible orthotropic solids with axial, radial, and circumferential material preferred directions.

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We currently have one opening for postdoc position at the Unviersity of Manitoba, Canada in the area of atomistic simulations of the electronic structure and physical properties of metallic systems. The position will investigate the correlation between the electronic structures and the physical properties (e.g., thermodynamics, corrosion/wear, and plasticity, etc.) of metals by using molecular dynamics and density functional theory simulations. 

Meredith Silberstein and Max Tepermeister

Cornell University, Sibley School of Mechanical and Aerospace Engineering

Ph.D. position at the Technion – Israel Institute of Technology.  The research is concerned with the modeling of failure and fracture in soft materials and biological tissues.  Preference will be given to candidates with background in nonlinear finite element methods and constitutive modeling. If you are interested, please send an email to me at: cvolokh [at] technion.ac.il (cvolokh[at]technion[dot]ac[dot]il) with a single PDF file containing

It is my pleasure to solicit nominations for the "Eshelby Mechanics Award for Young Faculty". This award, launched in 2012, is given annually to rapidly emerging junior faculty who exemplify the creative use and development of mechanics. The intent of the award is to promote the field of mechanics, especially among young researchers. While interdisciplinary work that bridges mechanics with physics, chemistry, biology and other disciplines is encouraged, the ideal awardee will demonstrate clear inspiration from mechanics in his/her research.

EML Webinar (Season 2) on 4 August 2021 will be given by Takao Someya on electronic skins for biomedical applications. Host: John A. Rogers, Northwestern University

Time: 9 am Boston, 2 pm London, 9 pm Beijing on 4 August 2021

Zoom Link: https://ter.ps/EMLWebinarS2

Live streaming on YouTube: https://ter.ps/EMLYouTubeLV

Universal deformations of an elastic solid are deformations that can be achieved for all possible strain-energy density functions and suitable boundary conditions. They play a central role in nonlinear elasticity and their classification has been mostly accomplished for isotropic solids following Ericksen's seminal work. Here, we address the same problem for transversely isotropic, orthotropic, and monoclinic solids.