It is known that platelet derived growth factor (PDGF) induced Rac activation depends on Src activity. However, we find that a local stress of physiologic magnitude via integrins can directly activate Rac GTPase rapidly, independent of the Src activity. Our finding on the stress-induced rapid Rac activation challenges the conventional wisdom on mechanotransduction and suggests that stress-induced signaling via focal adhesions does not follow signal transduction pathways induced by growth factors. To view the whole paper:

Hi all,

       Can Hydrostatic stress be used as a fracture criteria? If so can critical hydrostatic stress be found experimentally? Thanks.

Two post-doctoral researcher positions focusing on the two topics listed below are available immediately at Research Center for Applied Sciencs at Academia Sinica (中央研究院) in Taipei, Taiwan.

1) Ab initio MD simulations of Li ion diffusion on / inside novel electrode materials using accelerated MD. Candidates with expertises in ab initio MD, in particular, BOMD,  are highly desirable.

We present an application of ADINA in the thermo-mechanical analysis of friction welding. Please see: 



http://www.adina.com/newsgH61.shtml



You can find many other examples of applications of ADINA in the analysis of multiphysics problems here:   



http://www.adina.com/multiphysics.shtml

Civil Engineering Conference in the Asian Region and Australasian Structural Engineering Conference 2010

The 5^th International Civil Engineering Conference (CECAR5) hosted by Engineers Australia, together with the Australasian Structural Engineering Conference (ASEC 2010) will bring together a broad cross-section of the civil and structural engineering professions who want to learn, network and advance their technical skills.

Some links in imechanica website:

1. modern explosion science and engineering by Henry Tan

2. 爆炸力学的发展史 by Ying Li

3. Impact and explosion mechanics in China by Huang Peng

I am confused about the use of two-point tensors in elasticity. The deformation tensor F and first PK tensor are two point tensors, and the "two-point" property arises from use of two different Coordinate System When a continuum body is deformed, why it is necessary to move the Coordinate System as well? (or alternatively, why the coordinate system is attached to the body itself??, isn't it possible to use a general coordinate system which can represent the deformations and also account for the rigid body rotations of the continuum body?).

An old book of elasticity with excellent and precise theoretical explanations. It is still valuable and inspiring book in elasticity up to now.









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With great pleasure I inform you that Jerrold E. Marsden, of Caltech, are selected to receive the 2010 Thomas K. Caughey Dynamics Award.

I am writing on behalf of the Thomas K. Caughey Dynamics Award Committee: Zhigang Suo (Chair), Tayfun E. Tezduyar, Ares J. Rosakis, Kenneth M. Liechti, Lawrence A. Bergman, Daniel J. Inman, Krishnaswamy Ravi-Chandar, Thomas N. Farris, Wing Kam Liu, Mary C. Boyce, Paul Jennings, Geof Tomlinson, and Ali Nayfeh.