iMechanica - classic - Comments

Two Minor Points

Ajit R. Jadhav — Sat, 19 Jul 2008 14:03:04 -0400

Guru,

1. You wrote:

...more specifically, either the cube edge direction or the diagonal direction is elastically softer as compared to the other; that is, for a given force, the atoms in the softer direction are relatively more pliable.

I would think that the direction in which the atomic density were greater would have to be elastically stiffer. Right?

(BTW, a bit about the wording: Soft/Hard is better kept for permanent deformation, not the recoverable i.e. elastic ones. Another thing. It isn't that the atoms themselves would themselves become more or less pliable; at the most, it would be that the electron cloud or gas offer a smaller or a greater resistance. The curvature at the bottom of the "pit" in the energy-distance graph would be greater or smaller, respectively.)

2. For an article of this nature, diagrams showing Eshelby's steps would be very much appreciated---indeed, they would be necessary. Please see if you (or anyone else) can supply FEM simulations (complete with the color-coded changes in the surrounding fields) for those steps; that would be very helpful to the reader.

Thanks for the pointers!

Mogadalai Gururajan — Sat, 19 Jul 2008 00:31:02 -0400

Dear Mike/Pradeep,

Thanks for the pointers; Yes; Collected works is in my wish list (though I do not see myself being able to afford a personal copy anytime soon).

Pradeep:

I agree with you; his pedagogical paper on obtaining elast fields of dislocations is one that I enjoyed a lot in the recent past. And, I think he also sets us a nice standard in terms of making our works accessible to all -- be it geologists, mechanicians, physicists or materials engineers.

Guru

good idea...

Pradeep Sharma — Fri, 18 Jul 2008 08:13:30 -0400

Mogadalai,

This carnival is a neat idea....thanks for the link. I enjoyed reading your post as well. Buying the collected works of Eshelby (expensive as it is) was the best investment I have made as far research is concerned. Some of his "lesser known" works, in my opinion, are also quite enjoyable. It used to be a constant source surprise to me that Eshelby is so well known in the condensed matter physics community as well----A good example of a mechanician who has cut cross so many disciplines.

Do you know that there is collected work of Eshelby ?

Mike Ciavarella — Fri, 18 Jul 2008 02:00:48 -0400

I know it is a little expensive.....

Collected Works of J. D. Eshelby
The Mechanics of Defects and Inhomogeneities
Series:
Solid Mechanics and Its Applications
, Vol. 133

Markenscoff, Xanthippi; Gupta, Anurag (Eds.)

2006, XL, 940 p., Hardcover

ISBN: 978-1-4020-4416-8

Online orders shipping within 2-3 days

205,67 €

/* */

About this book

Table of contents

Reviews

About this book

J.D. Eshelby's work has shaped the fields
of defect mechanics and micromechanics of inhomogeneous solids in the
last fifty years and provides the basis for the quantitative analysis
of the controlling mechanisms of plastic deformation and fracture.
Bringing fundamental concepts from physics into the analysis of the
micromechanisms of deformation in solids, including the interaction of
lattice defects and cracks, microcracks, with other defects,
inhomogeneities etc., Eshelby provided the conceptual framework for the
fundamental physical understanding and the corresponding analytical
treatment of the complex interactions at the micro-level responsible
for the mechanical properties at the continuum scale. Eshelby's work
cut across disciplines and unified fields previously disjoint, such as
materials science, fracture mechanics, plasticity, and composite
materials. His paper on the ellipsoidal inclusion is the most cited in
solid mechanics, and many of his papers are highly cited. In this
volume we present the Collected Works of Eshelby unabridged as well as
forewords by D.M. Barnett (Stanford Unviversity), B. Bilby (Sheffield),
A. Seeger (Stuttgart), and J.R. Willis (Cambridge University) as to the
impact of Eshelby's work on their own and the field.

Written for:

Researchers, graduate students in Solid Mechanics, Materials Science and Solid State Physics

most cited papers

MichelleLOyen — Mon, 05 Nov 2007 10:43:20 -0500

Is it because the list represents relatively modern literature that was published as individual papers? I keep wondering why Hertz's original contact mechanics work would not be on this list except that it is most often cited via a chapter reference to his "Miscellaneous papers" in English or indirectly via something like Johnson's contact mechanics.

This list actually was displayed on the screen at a recent symposium on "Future Directions in Solid Mechanics" held at Cambridge in October (where it was noted to have been pulled from iMech!) to illustrate that you had to get to position 17 on the list before you hit the first paper that really qualified as computational mechanics.

Utilize the interlibrary loan

Weiming Lan — Thu, 28 Jun 2007 18:45:26 -0400

Hello, Zhigang Wei,

The Thompson Library at USC provides a service, called Interlibrary load, to help all USC students and faculty to get copies of papers, books. First look up the items on USC library website, if Thompson Library doesn't have the collection you need, then you can utilize the interlibrary loan to request them. Usually you can get a copy within two weeks. Good Luck.

Weiming

Thank you, Dr Suo! It's a

Zhigang Wei — Thu, 28 Jun 2007 11:21:55 -0400

Thank you, Dr Suo!

It's a good idea to utilize the available classic channel. I did not notice it before. Hopefully more of us can use this channel in the future.

Making a repository of classics

Mogadalai Gururajan — Thu, 28 Jun 2007 10:11:41 -0400

Most of the journal papers are available thse days as pdf files; and, more and more journals are also digitising their archives. So, someday, the papers will become more readily available; in such a case, it might be sufficient to have annotated bibliographies with the papers listed along with links to their DOI's.

On the other hand, the case of books is a bit tricky; most of the scientific books are not amenable to Gutenberg type of digitisations since figures, plots, micrographs, tables and illustrations form an important part of the books. From that point of view, Google books is an ideal way, where the books can be scanned and be made available. But, I do not how old the book should be so that a scanned copy can be made available to the entire world without infringing on copyrights.

In the meanwhile, if many of us write pedagogical articles about classics in our fields with liberal quoting from the original sources, that might be allowed since it is a fair use of the material. And, classics is a great channel for doing that. It might also be an ideal place to digitise and publish books which we know to be not under copyright--however, since digitising texts might be a very time consuming (not to mention intellectually unchallenging) task, I am not sure how many mechanicians will have the resources and inclination to do that. On the other hand, writing pedagoogical articles based on classic works, though also time consuming, is at least intellectually challenging as well.

Use the channel "classic" to collect classics in our field

Zhigang Suo — Thu, 28 Jun 2007 04:41:50 -0400

Amazon lists a copy for sale at $45.
I took liberty to add the tag "classic" to your post.

Classic is a channel featured in the header of iMechanica. The channel is underused, but it may provide a way for us to accumulate the classics in our field, as suggested in your post. What do you think?

elasticity

Baljeet Singh — Wed, 20 Jun 2007 14:56:13 -0400

The work of Prof. A. C. Eringen on micropolar elasticity should be added in the list.

who is who

Henry Tan — Tue, 10 Apr 2007 15:29:37 -0400

citation number just gives you an idea of who is who; should not be too serious about that.

Timoshenko & Goodier

Robert Paynter — Tue, 10 Apr 2007 13:50:45 -0400

Timoshenko & Goodier's "Theory of Elasticity" really ought to be in the list.

Google Scholar credits it with almost twice the number of cites (3597) as Eshelby's top paper (1803). If those ratios with your numbers hold up then his other book "Theory of Elastic Stability" with JM Gere should make the list as well.

I notice you used the Web of Science; I have found it dissapointing lately compared with Google Scholar because it doesn't cover books, conference proceedings and other sources at all well. Agreed it does some things better but - I tend to go to Google first nowadays.

the list

Noel ODowd — Tue, 03 Apr 2007 17:46:08 -0400

It is interesting that 4 of the 'top 18 list' come from the somewhat specialised (?) area of Fracture Mechanics. I wonder why these papers rank so highly.

Panta Rhei - everything

Alex Liberzon — Tue, 13 Mar 2007 09:27:29 -0400

Panta Rhei - everything flows

A list of highly cited papers on poroelasticity

Zhigang Suo — Sat, 10 Mar 2007 17:43:56 -0500

Following up on a tip given by Michelle Oyen, I found this list of highly cited papers on poroelasticity identified by Alex Cheng of PoroNet.