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.
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.
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 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:
EML Webinar on May 6, 2020 will be given by Prof. Xuanhe Zhao at MIT via Zoom meeting.
Title: Extreme Mechanics of Soft Materials for Merging Human-Machine Intelligence
Time: 7 am California, 10 am Boston, 3 pm London, 10 pm Beijing on May 6, 2020
Zoom Link: https://harvard.zoom.us/j/271079684
Zoom ID: 271 079 684
