Journal club for January 2018: Recent advances in liquid crystal elastomer
Recent advances in liquid crystal elastomer
Zhijian Wang, Shengqiang Cai
Department of Mechanical and Aerospace Engineering
Materials Science and Engineering Program
UCSD
research
Metastable phase transformation and deformation twinning induced hardening-stiffening mechanism in compression of silicon nanoparticles
The compressive mechanical responses of silicon nanoparticles with respect to crystallographic orientations are investigated by atomistic simulations. Superelastic and abrupt hardening-stiffening behaviors are revealed in [110]-, [111]- and [112]-oriented nanoparticles. The obtained hardness values of these particles are in good agreement with the experimental results. In particular, [111]-oriented particle is extremely hard since its hardness (∼33.7 GPa) is almost three times greater than that of the bulk silicon (∼12 GPa).
An inspiring seminar by Prof. Huajian Gao -- Mechanics as an Enabling tool in bioinspired materials and biological interactions of nanomaterials
Professor Huajian Gao of Brown University speaks at MIT Distinguished Seminar Series (March 2016).
It is a unique opportunity to enjoy the many important recent achievements of Huajian's group.
Mechanics as an Enabling tool in bioinspired materials and biological interactions of nanomaterials
Here.
Not to be missed!
Regarding to the effective elastic property of a double-layered perforation
Choose a channel featured in the header of iMechanica
Dear Friends, Attached please find a doc describing the problem. Any feed back is welcome. Thanks!
Papangelo's criterion for stickiness of rough (hard) random surfaces
A generalized Johnson parameter for pull-off decay in the adhesion of rough surfaces
Multiple spatially localized dynamical states in friction-excited oscillator chains
- Journal of Sound and Vibration
29th Robert J. Melosh Competition - Call for Applicants & Papers
Twenty-ninth edition of the Annual Robert J. Melosh Competition at Duke University
Duke University will host on April 27, 2018 the XXIX Annual Robert J. Melosh Competition for best papers by graduate (or recently graduated) students. The deadline for extended abstract submission is January 22, 2018.
Fontanela instability in non-linear oscillators with cyclic symmetry
I wanted to bring attention to the very important Fontanela et al recent results in vibrations of cyclic structures like in turbine engines.
Can you "chop" a mechanical wave?
In this paper we highlight several interesting phenomena that may emerge from coupling simple elastic systems like 1d bars. While in compostes we usually focus on wave propagation normal to the stratification direction (composite layers are coupled in series), here we show that extreme attenuation at multiple frequencies may emerge in linear systems that are coupled transversaly. We also introduce a simple device that act as a chopper for mechanical signals.
Poisson Contraction and Fiber Kinematics in Tissue: Insight from Collagen Network Simulations
Connective tissue mechanics is highly non-linear, exhibits a strong Poisson effect and is associated with significant collagen fiber re-arrangement. Although the general features of the stress-strain behavior in tension and compression and under uniaxial, biaxial and shear loading have been discussed extensively, especially from the macroscopic perspective, the Poisson effect and the kinematics of filaments have received less attention. In general, the relationship between the microscopic fiber network mechanics and the macroscopic experimental observations remains poorly defined.