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Thin Material

Submitted by Masayuki Wakamatsu on Sat, 06/07/2008 - 21:17

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Intefacial Fracture

Hello, imechanicians,

If you are (or to be) an experimentalist and have a good idea, please help me!

I have a Si - Si DCB and would like to initiate a crack and hold it as it is (similar to a crack initiated in mica with a razor blade) According to my calculation, I need something like 1 to 5 um thickness. It could be sometime like a wedge shape.

If you have any good idea, please give me a suggestion!

Thank you,

Masa

Effect of Elastic Anisotropy on Surface Pattern Evolution of Epitaxial Thin Films

Submitted by Rui Huang on Sat, 06/07/2008 - 00:37

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thin film

R. Huang Group Research

surface pattern

anisotropic elasticity

epitaxial film

Young Modulus versus temperature

Submitted by Martin Della Torre on Thu, 06/05/2008 - 20:25

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Hi.

This is a material's problem.

I'm trying to simulate in FEA (Ansys) a part of a rectangular duct. this duct works with a flue gases qith elevated temparature (aporx 300°C).

Does anyone knows any standard (ASTM or similar) or any bibliography who gives data in form of tables or graphics that shows the variation of young modulus against temperature variation for materials?

Thanks

Martin

Does a scientist who has had three patents in the past five years, but only three papers, each cited just three times, deserve m

Submitted by Mike Ciavarella on Wed, 06/04/2008 - 18:05

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publications

From the blogosphere

Nature 453, x (2008). doi:10.1038/7196xc

Does a scientist who has had three patents in the past five years,
but only three papers, each cited just three times, deserve more
recognition than one with five Nature papers and 1,000 citations?

Can anyone download the full paper I have no access to Nature!!!!

Why Google SCHOLAR will stop this oligopoly of publishers

Submitted by Mike Ciavarella on Mon, 06/02/2008 - 22:20

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decline of publish or perish

And read why Google Scholar will silently stop this crazyness

Scientometrics
Vol: 74, Issue: 2, February 2008
pp. 273 - 294

Maximum entropy coordinates for arbitrary polytopes

Submitted by N. Sukumar on Mon, 06/02/2008 - 20:52

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barycentric coordinates

arbitrary polygons

maximum entropy

In the attached paper, we construct new generalized coordinates for arbitrary polytopes in d-dimensions (polygons and polyhedra in 2- and 3-dimensions, respectively) using the principle of maximum entropy. The paper is to appear in Computer Graphics Forum and will be presented at the SGP'08 Conference in Denmark.

Journal Club Theme of 1 June 2008: Magnetic resonance imaging in biomechanics

Submitted by Valentina Taviani on Sun, 06/01/2008 - 19:03

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Load-displacement curve for concrete

Submitted by Gouse on Sun, 06/01/2008 - 13:01

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crack propagation

smear cracking model

I am trying to predict load-displacement curve for concrete cube numerically through ABAQUS. I am just beginer with ABAQUS, I have gone through the concrete material models available in ABAQUS. I found that smeared crack model well suite for analysis. Initially I am simulating a 2D model, I am using plane stress elements with static, Riks options, even I could able to complete the analysis, I am confused how to view the cracked elements and how to plot load-displacement curve.