https://doi.org/10.1016/j.jmps.2020.104017

Abstract

AIAA Materials Technical Committee will present an AIAA online short course on Multiscale Structural Mechanics starting on August 5th, 2020. More details can be found at  http://aiaa.mycrowdwisdom.com/diweb/catalog/item?id=5196778

The full paper can be found at:

https://authors.elsevier.com/c/1b2plc7qwXwm0

Abstract:

Geometric incompatibilities are ubiquitous in natural structures and are recently being exploited in synthetic

structures to enhance the performance of soft systems. In this work we focus on infinitely long bi-layer

neo-Hookean tubes with radial incompatibilities, i.e. the outer radius of the inner tube is different than the inner

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

NU-TAM Webinars on Breakthroughs in Mechanics

TUESDAY – June 2nd 2020, 10 AM (Chicago)
https://northwestern.zoom.us/j/94584352713

New Perspective of Quasibrittle Fracture Mechanics Inspired by Novel Test with Crack-Parallel Compression

Zdeněk P. Bažant

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.

You're invited to a webinar this May 21st on characterizing foam materials in Simpleware software.

Please find the detailed information at http://ectm.et.tudelft.nl/Openings/vacancy.php?id=85 

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.