Dear Colleagues,

I am writing to share with you my article titled, "Precipitation during creep in magnesium-aluminum alloys" , which has been published in the journal Continuum Mechanics and Thermodynamics. 

Lightweight magnesium-aluminum alloys show significant tension-compression asymmetry under creep loading. This work offers an explanation of this phenomenon.

Link to the article: https://rdcu.be/ct4zi

Dear Colleagues:

We would like to cordially invite you to attend the mini-symposium entitled "320: Mechanics and Physics of Active Materials" orinized at the 19th U.S. National Congress on Theoretical and Applied Mechanics. The conference will be held in Austin, Texas, June 19–24, 2022 (http://www.usnctam2022.org/congressMS).

Dear iMechanicians, I would like to share our recent work on a drop confined by two adhesive graphene sheets (as illustrated below). 

Amit Acharya

A formal methodology for developing variational principles corresponding to a given nonlinear
pde system is discussed. The scheme is demonstrated in the context of the incompressible
Navier-Stokes equations, systems of first-order conservation laws, and systems of Hamilton-
Jacobi equations.

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.

https://twitter.com/zhigangsuo/status/1421421505540333571

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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