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Introducing a new website for the Society of Engineering Science (SES)

Submitted by vicky.nguyen on

Dear iMechanica Community,

 

It is my pleasure to announce that SES has a new online home. Please visit us at https://socengsci.org to learn more about SES and its activities.

 

 

Best Regards,

 

Thao (Vicky) Nguyen

President of SES

Professor

Department of Mechanical Egineering

Johns Hopkins University

Faculty Position in "Sustainable Materials" at EPFL, Switzerland

Submitted by Pedro Reis on
job
EPFL
faculty opening
materials
europe
Switzerland

The School of Engineering at EPFL invites applications for an industry-sponsored tenure track assistant professor position in Sustainable Materials within its Institute of Materials. We seek exceptional individuals who will develop and drive a research program at the forefront of the discipline, who have a strong dedication to teaching at the undergraduate and graduate levels, and who will be proactive members of their professional and university communities.

 

Plasticity without phenomenology: a first step

Submitted by Sabyasachi Cha… on

Sabyasachi Chatterjee, Giacomo Po, Xiaohan Zhang, Amit Acharya, Nasr Ghoniem

A novel, concurrent multiscale approach to meso/macroscale plasticity is demonstrated. It utilizes a carefully designed coupling of a partial differential equation (pde) based theory of dislocation mediated crystal plasticity with time-averaged inputs from microscopic Dislocation Dynamics (DD), adapting a state-of-the-art mathematical coarse-graining scheme. The stress- strain response of mesoscopic samples at realistic, slow, loading rates up to appreciable values of strain is obtained, with significant speed-up in compute time compared to conventional DD. Effects of crystal orientation, loading rate, and the ratio of the initial mobile to sessile dislocation density on the macroscopic response, for both load and displacement controlled simulations are demonstrated. These results are obtained without using any phenomenological constitutive assumption, except for thermal activation which is not a part of microscopic DD. The results also demonstrate the effect of the internal stresses on the collective behavior of dislocations, manifesting, in a set of examples, as a Stage I to Stage II hardening transition.

Journal Club for May 2020: Correlative microscopy reveals deformation mechanisms of polycrystalline metals using AZ31 Mg alloy as a model material

Submitted by kelvin_xie on
research
jClub

Dexin Zhao , Kelvin Xie 

Department of Materials Science and Engineering, Texas A&M University, College Station, TX 77843, USA.

Abstract

Modeling and simulation for Covid-19 using machine learning and computational methods

Submitted by marco.paggi on
research
Covid-19; SIR models; machine learning; modeling and simulation

The full video of a recent symposium organized by the Young Academy of Europe on Covid-19 epidemiology is now online on YouTube, see: https://www.youtube.com/watch?v=Sy1qVBs6fHI

Virtual testing and digital twin models for Industry4.0 - PhD positions and industrial cooperations

Submitted by marco.paggi on
industry
PhD positions; Industry4.0; Digital twins; Virtual testing

Virtual testing is an established methodology in computational mechanics to accelerate the design of new materials and components. Nonetheless, there is plenty of room to transfer such methods in R&D departments of SMEs.

Recently, digital twin models come into play, and they are opening even more perspectives to incorporate computational mechanics and optimization towards the realization of digital models of real production lines. 

A recent demonstrator of those technologies has been recently realized in Italy, see: 

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