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May be a simple Problem-about fourier transformation in Li shaofan's book

Submitted by T.ZENG on

Hi, thanks for your attention!!!

I have recently read the book, Introduction to Micromechanics and Nanmechanics, written by ShaoFan, Li. This is
really a good book for the freshmen who are interested in
micromechanics area. 

But one problem puzzled me for along time,  the puzzlement i have put it in the attached file.

If you know the answer,please tell me. You kindly reply will be great appreciated! Thank you very much!!!

How we can calculate stress intensity factor for bimaterial interface

Submitted by kaslantas on
research

Hi friends,

I would like to calculate stress intensity factor for bimaterial interface using finite element method. Do you have any suggestion about it? Actually I know a method. According to this method,

1-obtain crack face displacement using numerical solution

2- use dundur parameter 

 

Is this method is correct/enough?

 

As you know Franc2D code calcuate SIF for mode I and mode I. But I do not know this code can calculate SIF for bimaterial interface? 

Thanks 

Book Review

Submitted by Pradeep Sharma on
opinion
micromechanics
book

Micromechanics---loosely speaking, is the study of heterogeneities in materials and its consequences for material or continuum behavior. This encompasses studies of inclusions, dislocations, cracks or more generally defects. A related problem is that of "coarse-graining" or in other words the effective homogenized properties of a heterogeneous material. The latter is a recurring theme in all of physical sciences not just solid mechanics. Micromechanics, a formidable subject by all means, dominated a substantial part of the history of solid mechanics. Several of our Timoshenko awardees have been associated with this subject, e.g. Eshelby, Hill, Keller, Irwin, Rice among others.

Writing a Main program to test UMAT

Submitted by nitinchandola on

Hi Mechanicians,

 I have written a UMAT for single crystal plasticity analysis but it is not running properly. I want to debug it. Is there anyway to do that with Abaqus? In order to debug it in a Microsoft VC++ environment I decided to write a main program for the UMAT subroutine. Does this approach seem valid? Also what type of variables should be passed into the UMAT subroutine from the Main program?  

 

Any help would be appreciated.

Thank you

Nitin

50 Post-Doctoral Positions available at the new Research Center of Excellence in Mechanobiology

Submitted by Chwee Teck Lim on
job
Post-Doctoral fellows

 

A new $150M Research Center of Excellence (RCE) on Mechanobiology has been set up at the National University of Singapore  (http://newshub.nus.edu.sg/headlines/0209/TRCE_20Feb09.php).  We are now in the process of hiring 50 good post-docs. 

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