We show that it is possible to distinguish between homogeneous and heterogeneous dislocation nucleation on the basis of differences in experimentally measured theoretical strengths. From nanoindentation tests, the critical shear stress for dislocation nucleation in two different Mo-alloy single crystals (Mo-3Nb and Mo-10Al-4Ni) is found to be ~1/8 of the shear modulus. The corresponding stress in uniaxially compressed Mo-10Al-4Ni micropillars is ~1/26 of the shear modulus.

Schlumberger, in relation with its R&D effort related to Co2 Storage
(http://www.slb.com/carbonservices), is looking for a highly innovative
and motivated individual with a background in geo-mechanics to join its
multi-disciplinary engineering team. A PhD in a field related to
geo-mechanics (Solid mechanics, fracture mechanics, civil engineering,
geophysics etc.) is necessary. No prior work experience is required. The
candidate must have experience in numerical  and analytical modeling:

I am PhD student and i'm working on the behavior of bonded joints under impact and i have one question :What are the differences between a cohesive element, an interface element and a embedded process zone element ?  Do they have fundamental differences or it's only a difference of the cohesive law expression.

Expected starting date: April 01, 2008 (if no issue with work VISA for international applicants) 

Salary: Negotiable

Duration: One year with a possibility of another year's extension subjected to availability of funds.

I have posted an advanced solid mechanics textbook on http://solidmechanics.org/

It works on Internet Explorer, but may not work on all browsers. Topics include: mathematical descriptions of deformation and forces in solids; constitutive laws; analytical techniques and solutions to linear elastic and elastic-plastic boundary value problems; the use and implementation of FEA; fracture mechanics; and the theory of deformable rods, plates and shells.

Please visit www.jove.com

You'll find tons of video about biological experiments you might be interested in. It is very useful for most of mechanicians who lack this kind of knowledge and experience. Enjoy yourself!

You are invited to present your research work on the mechanical behavior of nanocomposite materials (Nov. 13-19, 2009 in Florida ). This topic will be focused on systematic mechanics experiments, modeling and simulations to solve new challenging mechanics problems such the effect of nanofiller agglomeration on the stiffness and strength reduction; interfacial stress transferring and interface strength evaluation at the nanoscale.

A postdoctoral research position in first-principles based
multiscale modeling of catalysts for PEM fuel cells is available immediately at
the Richard
G. Lugar Center for Renewable Energy in Indiana University-Purdue University
Indianapolis (IUPUI). The candidate will work on a
project on developing low-cost yet high-performance low temperature fuel cells.
This project involves close collaborations with the experimental scientists.
The candidate should hold a doctor degree in a relevant discipline, such as Materials
Science, Mechanical Engineering, Chemistry, or Chemical Engineering. The ideal
candidate should have a strong background in atomistic scale simulations
(Density Functional Theory, molecular dynamics, and Monte Carlo methods) and scientific