Skip to main content

Metastable phase transformation and deformation twinning induced hardening-stiffening mechanism in compression of silicon nanoparticles

Submitted by mohsenzaeem on

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

Submitted by Mike Ciavarella on

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!

Call for abstracts, WCCM 2018 MS411: Concurrent multiscale modeling in solids and structures: coupling methods from micro to macro scales.

Submitted by Alejandro Mota on

Dear colleagues and friends,

 

On the occasion of the 13th World Congress on Computational Mechanics (WCCM 2018, http://www.wccm2018.org) to be held in New York City on July 22-27, 2018, we are organizing the mini symposium

 

Concurrent multiscale modeling in solids and structures: coupling methods from micro to macro scales (MS 411).

 

Fracture mechanism in notched metal

Submitted by Jabar on
Choose a channel featured in the header of iMechanica

G'day all

Having a metal element with a notch like crack (assume sharp one, exhibits plasticity),  what are the actual fracture mechanism (the phases the crack goes through) in the total fatigue-life. 

please comment on these scenarios:

1- crack initiation life calculated from the (S-N, e-N), then using LEFM/EPFM to determine the cycles for the crack propagation to failure...

Q/ how to find the crack length between the two phases, I mean from which stresses and at which crack length we start the crack propagation life estimation.

IUTAM Symposium on Architectured Materials Mechanics: Call for abstracts

Submitted by Francois Barthelat on

This "Architectured Materials Mechanics" IUTAM (http://iutam.org/) Symposium will take place September 17-19, 2018 in downtown Chicago, Illinois. It aims to provide a state of the art on the engineering science (design, fabrication, mechanics) of architectured materials including (but not limited to): lattice materials, metamaterials, origami, topologically interlocked materials and bioinspired materials. The list of invited speakers can be found on the symposium website:

Two new PhD positions in bioinspired architectured materials and structures, McGill University

Submitted by Francois Barthelat on

We have new openings for two PhD students –fully funded - in the Laboratory of Advanced Materials and Bioinspiration at McGill University, starting Fall 2018 (Application deadline: 01/15/2018)

OPEN ACCESS - Modelling deformation and fracture of Gilsocarbon graphite subject to service environments

Submitted by shavijabranko on

Dear all,

Our article on experimentally-informed modelling of deformation and fracture of Gilsocarbon graphite subjected to service environments, published in the Journal of Nuclear Materials, is now available as open access. You can download it at: https://www.researchgate.net/publication/320925660_Modelling_deformatio…;

Regards,

Branko