An immediate opening for a Ph.D. student in Solid/Structural Mechanics is available at Swinburne University of Technology, Melbourne, Australia. The successful candidate will work with Prof. John Beynon, Prof. Guoxing Lu and Dr. Tracy D. Ruan to investigate the structural components made of aluminium and/or with metallic foams, with enhanced crashworthiness performance under several typical static and impact loadings.   (*Please note that IELTS score is a MUST for this position.*)

After I put down the phone, my heart never felt so heavy. I just called my parents in my hometown, Chengdu,  a city with 12 million people, which is just 90 kilometers away from the center of the strong earthquake at a magnitude of 7.9.  It has killed more than 10,000 people so far. The death toll is still rising hour by hour.

Fig. 1 Earthquake map by the United States Geological Survey

The number of registered users of iMechanica reaches 7000 on 11 May 2008. So far, our fellow iMechanicians have contributed 3172 posts and 7425 comments.  The evolving statistics of iMechanica
(see the latest updates here and here) shows a steady growth with no sign of slowing down. 

Check out the earlier milestones of iMechanica when the number of registered users reached:

6000

How to caculate stress? thanks

I am confused about apply BC of a model in abaqus. because I find that if I apply the accelaration of earthquake on BC, I must remove the fixed constraints applied on BC in previous step in abaqus. so the model become a free body without any constraints.

 any expert can give me some detailed suggestions?thank you very much!^_^

In the attached paper (accepted for publication), we present enriched FE formulations to impose Bloch-periodic boundary conditions. Bloch-periodic BCs arise in the description of wave-like phenomena in periodic media: periodic composites, Schrodinger equation in quantum mechanics, photonic band-gap materials, etc. For a perspective, see the J-Club on elastodynamic bandgaps and metamaterials that was organized by Biswajit Banerjee

 in B. D. Reddy (ed.). IUTAM Symposium on Theoretical, Modelling, and Computational Aspects of Inelastic Media, 99-105. Springer Science, 2008.

I am using Meshless Petrov-Galerkin Method(MLPG) for non-rectangular domains. There is a flexibility of using any shape for weight function and also for local quadrature  domain. Here in my case case weight function domain and local quadrature domains are same.

 I want to know that  , for non-rectangular domains,how the different shapes of weight functions (specially circular or rectangular) will affect accuracy of the result  ?