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We have studied the scaling of controlled nonlinear buckling processes in materials with dimensions in the molecular range (i.e., ～1 nm) through experimental and theoretical studies of buckling in individual single-wall carbon nanotubes on substrates of poly(dimethylsiloxane). The results show not only the ability to create and manipulate patterns of buckling at these molecular scales, but also, that analytical continuum mechanics theory can explain, quantitatively, all measurable aspects of this system.

PRL 101, 145501 (2008)      http://www.nature.com/news/2008/081010/full/news.2008.1164.html, http://www.sciencenews.org/view/generic/id/34974/title/Carbon_tubes,_bu…

Dear Prof. Dolbow

 In your 1D efg program, you have used u=d(1:nnodes). I think, you should calculate "u" by summing after multiplying with the shape functions and "d". Because in the figure 2 phi(x) is not equal to one at the node. Phi(x) satisfies the partition of unity.

Please clearify my doubt if I am wrong.

Best regards

krishna

venkatakrishnaraop [at] gmail.com (venkatakrishnaraop[at]gmail[dot]com)   

I would like to invite everyone attending the 2008 ASME IMECE next week in Boston to attend a keynote lecture given by Prof. Ted Belytschko of Northwestern University.  The lecture will occur at 1:45 PM on Tuesday, November 4, and will be entitled "Multiscale Computations of Fracture - When Does Flaw Tolerance Occur?" 

Further information on Prof. Belytschko's talk can be found here: 

http://www.asmeconferences.org/Congress08/PlenarySessions.cfm

I am reading the paper of Prof. Nishioka (2001) (Int. Jour. of Solid and Fracture, Vol. 38, 5273-5301). He said that "At the earlier stage of crack deceleration, dot(KID) is positive and linear relation with crack tip velocity". I do not understood that meaning. This is from mathematical, right? If after the earlier stage of crack deceleration, which relation between dot(KID) and crack tip velocity?

Can anyone provide some guidelines regarding  CFD based aeroelasticity? And if possible some references as well.  

Hello everyone,

When you create the model (for example a rectangle sample) in abaqus, I don't understand how you apply a crack and how you have a stress distribution in all the sample. Can somebody advise me ?

Thanks in advance.

 Infinity.

Hi

Can everybody explain me about "eigensolver , eigenfrequency , eigenmode , eigenvalue , ..."?

Thanks in advance

Ho1mo

CMIS09

5^th Contact Mechanics International Symposium

April 28-30, 2009, Chania, Greece

www.cmis2009.tuc.gr

 organized by

Prof. G.E. Stavroulakis

Technical University of Crete