Morphable 3D mesostructures and microelectronic devices by multistable buckling mechanics
Reconfigurable electronic devices that can be shaped in two or more stable geometries modifying their functionalities have been realized, as highlighted by the Cover of March 2018 Issue of Nature Materials.
Employment Opportunity for an Associate Program Director Position, National Science Foundation
CMMI 18-003Dear Colleague Letter: Directorate for Engineering (ENG), Division of Civil, Mechanical and Manufacturing Innovation (CMMI) - Employment Opportunity for an Associate Program Director Position (Open Until Filled)
February 20, 2018
Dear Colleagues:
The Division of Civil, Mechanical and Manufacturing Innovation (CMMI), within the Directorate for Engineering (ENG), at the National Science Foundation, announces a nationwide search to fill an Associate Program Director position.
Modeling rate dependent damage in polymer networks with sacrificial bonds
Mechanical Response of Two Dimensional Polymer Networks: Role of Topology, Rate Dependence, and Damage Accumulation
From 3D Images to Models - Introduction to Simpleware Software Workshop, Nuremberg, March 14th
Date / Time: Wednesday, March 14, 2018 / 1:30 pm - 4:30 pm
Location: Nuremberg, Germany
Fee: Free-to-attend. Pre-registration is required as places are limited
Fatigue Fracture of Self-Recovery Hydrogels
Dear Colleagues,
Here is our recent paper “Fatigue Fracture of Self-Recovery Hydrogels”. To the hydrogel community, this paper distinguishes the fatigue fracture and the self-recovery of a hydrogel. To the mechanics community, we show that, for the first time in hydrogels, the fatigue threshold depends only on the covalent network, but not on the noncovalent interactions that provide dissipation.
https://pubs.acs.org/doi/abs/10.1021/acsmacrolett.8b00045?journalCode=a…
Multiscale constitutive modeling of composite- SwiftComp
AnalySwift provides an efficient high-fidelity composite modeling tool-SwiftComp. You may check these links to get more on SwiftComp and tutorials.
http://analyswift.com/composite-analysis-software-applications/
http://analyswift.com/gmsh4sc-swiftcomp-standalone-gui-video-tutorials/
On the connection between Palmgren-Miner’s rule and crack propagation laws
M.Ciavarella, P.D’Antuono, A.Papangelo
Politecnico di Bari, 70125 Bari, Italy. mciava [at] poliba.it
Abstract
Congratulations to Prof. M. Ciavarella, new member of IJMS editorial board!
Congratulations to Prof. M. Ciavarella for having been nominated a new member of the International Journal of Mechanical Sciences (IJMS) Editorial Board! IJMS is a well-established Journal published by Elsevier. With its Impact Factor being 2.884 in 2016, IJMS ranks No. 15 among 133 journals in the field of Mechanics!
https://www.journals.elsevier.com/international-journal-of-mechanical-s…
Congratulations!
Antonio
Stress is defined as the quantity equal to ... what?
In introducing the very concept of the stress tensor to the beginning student, text-books always present only indirect relations involving the concept. Thus, you have the relations like "traction = (stress-transposed)(unit normal)" (i.e. Cauchy's formula, for uniform stress), or the relations for the coordinate transformations of the stress tensor, or the divergence theorem (for non-uniform stress). These are immediately followed or interspersed with alternative notations, and the rules for using them.
But what you never ever get to see, in text-books or references, is this: a *direct* definition of the stress tensor, i.e. an equation in which there is only the stress tensor on the left hand-side, and some expression involving some *other* quantities on right hand-side. Why? What possibly could be the conceptual and pedagogical advantages of giving a direct definition of this kind, and its physical meaning? I would like to ponder on these matters here, giving my answers to these and similar questions in the process.