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More replies to Yavari, fractals, strongly emotional disputes, and what really leads to Nobel prize

Submitted by Mike Ciavarella on

Dear Yavari

I have promised more replies on Mandelbrot, fractals, strongly emotive discussions in journals, and here is a coincise statement, which I take from a Nobel prize, prematurely passed away last year.  I think it has a lot to teach (including the kind of attitude that leads to Nobel prize, i.e. close to no human weakness), you will recognize the real name of the "Caesar" in this book is somebody with a 58 pages CV on his web site, most likely.

For a better idea of fractals, read please the other attachment.

Regards

Mike

The maximum receptor-ligand bond spacing to ensure cell adhesion in ligand-coated substrates

Submitted by Yujie Wei on

Recent experiments by Arnold et al. (ChemPhysChem, vol. 5, 2004, p383 ) revealed that a distance of less than 58-73 nm between receptor-ligand bonds is necessary to ensure focal adhesion in cells adhering to ligand-coated substrate. An elegant solution to this problem is supplied by Lin, Inamdar, and Freund.

Is the limit of stress intensity factors "1" when the crack length is close to "0"?

Submitted by Zhanqi Cheng on

I have read some papers about fracture mechanics of functionally graded materials. I find there are different results for the stress intensity factors when the crack length is close to "0" . In some papers the values of stress intensity factors are "1" when the crack length is close to "0" , but in other papers the values of stress intensity factors are not "1". I obtain the stress intensity factors is "1" when the length of crack is close to "0". I hope to get the explaination about the results.Thanks a lot.

to model creep behavior in ABAQUS

Submitted by balappa on

Hiya,

I have different stress strain curves at different hours (1hr, 10hr, 100hr).  for a constant stress, the strain increases with increase in number of hours(creep)

They look like stress-strain curves at different strain rates.

now I want to define a material card with these curves with above mentioned number of hours.

I kindly request you to suggest me a CARD in ABAQUS which takes care of this behavior.

Thanks a ton for your help, in advance !

-Balappa.

Toupin-type Decay and Saint-Venant's Principle

Submitted by Jian-zhong Zhao on

Saint-Venant's Principle is important in the theory and application of elasticity and its proof or formulation is a major attraction  for authors. Among others,Toupin's Theorem plays  the most influential  role in the history of  development  concerning Saint-Venant's Principle.

Postdoctoral Position in Multiscale Mechanical Modeling at Cornell

Submitted by Derek Warner on

A postdoctoral position is available starting June 1st within the School of Civil and Environmental Engineering at Cornell University. The project entails an investigation of the key features associated with ductile fracture in aluminum alloys.  The investigation will utilize a concurrent discrete-dislocation atomistic simulation framework and will likely