Recentl, in my research ,I need measure the deformation in the soil caused by the simulation of tunnelling construction in the labotory.In China, I have not found the proper devices to get the deformation occured under the simulation soil surface.Anyone who knows the devices or give me the advice will be appreciated!

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

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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.