Postdoctoral Positions Available: Computational Solid and Fluid Mechanics for Probabilistic Simulation and Machine Learning Applied to Performance Based Engineering. Natural Hazards Engineering Research Initiative SimCenter @ UC Berkeley
open position: Full Professorship on Applied Mechanics (Materials Theory) at the Faculty of Civil and Environmental Engineering, University of Stuttgart, Germany
Acta Mechanica Sinica (Volume 33, Issue 1, 2017 ) is online now !
Dear everyone!
The first issue in 2017 (Volume 33, Issue 1) of Acta Mechanica Sinica (AMS) is online now.
Welcome to this SCI-indexed journal http://ams.cstam.org.cn for rapid publication of your exciting results.
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We demonstrated outstanding compressibility of holey graphene nanosheets, which is impossible for pristine graphene. Holey graphene powder can be easily compressed into dense and strong monoliths with different shapes at room temperature without using any solvents or binders.
ACS Nano, Article ASAP, http://pubs.acs.org/doi/abs/10.1021/acsnano.7b00227
We are looking for highly motivated PhD candidates to study the multiscale cracking in 3D printed glass-polymer composites. The main objectives of the project are to develop a multiscale numerical modeling framework for cracking in PA12/glass beads samples obtained by additive manufacturing (Selective Laser Sintering, SLS) and to combine these numerical tools with experimental 3D imaging and in-situ mechanical testing techniques to identify the models. The PhD is part of a funded national research project involving several academic institutions and an industrial partner.
When a solid object is stretched, in general, it shrinks transversely. However, the abnormal ones are auxetic, which exhibit lateral expansion, or negative Poisson ratio. While graphene is a paradigm 2D material, surprisingly, graphene converts from normal to auxetic at certain strains. Here, we show via molecular dynamics simulations that the normal-auxeticity mechanical phase transition only occurs in uniaxial tension along the armchair direction or the nearest neighbor direction. Such a characteristic persists at temperatures up to 2400 K.
Shear banding and stick-slip instabilities have been long observed in sheared granular materials. Yet, their microscopic underpinnings, interdependencies and variability under different loading conditions have not been fully explored. Here, we use a non-equilibrium thermodynamics model, the Shear Transformation Zone theory, to investigate the dynamics of strain localization and its connection to stability of sliding in sheared, dry, granular materials. We consider frictional and frictionless grains as well as presence and absence of acoustic vibrations.
