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Another "straightforward" calculation

Submitted by Biswajit Banerjee on

Following Andy's recommendation I have been reading Ellis Dill's Continuum Mechanics[1]. In page 75 of the book, we find the
well known result that the constitutive equation for an isotropic hypoelastic
material can be derived from a stored energy function only if



 

where and are the Lame constants.

The efficiency of turbines

Submitted by Ajit R. Jadhav on

Hello students (and also others) at iMechanica,

Last weekend, while channel browsing on TV, I happened to notice a documentary on the Hoover dam (in the US). It showed a number of jets of water, huge ones, forcefully springing forth out of the rock faces just downstream of the dam. These were the water jets coming off the electricity generation plant of the dam, *after* their job of generating electricity was already over.

Graduate students and publishing

Submitted by MichelleLOyen on

I just stumbled on this very interesting discussion on why science graduate students should publish, regardless of their later career intentions.  I agree with the author on most points, but believe it really comes down to two things: (1) if you aren't going to communicate your results (both good and bad!) then you might as well have not bothered to do the work, and (2) becoming a good writer is a skill that every technical person will need in any career.

modelling of friction welding process using abaqus

Submitted by venkat_dsk84 on

I am a postgraduate student studying in india.I am doing my project in friction welding . I have to create a finite element model of friction welding process and then simulate it to get the shortening distance.I am new to ABAQUS so help me by sening the procedure for creating a finite element model of friction welding process and then simulating it .

My E-mail address is

VENKAT_DSK84 [at] YAHOO.CO.IN (VENKAT_DSK84[at]YAHOO[dot]CO[dot]IN)

Theoretical Notes (ALE)

Submitted by hmdthr on

Hello,

 I need some detailed informations about topics below:

 Single material ALE

 -Advection schemes

 -Mesh smoothing algorithms

 Multi-material ALE

 -Volume fraction weighted stress

 -Interface reconstruction

 -Moving mesh techniques

 FSI

 -Constraint based method

 -Penalty based method

 -Leakage

Can anybody help me?

Thanks alot

 

Interesting Material: d3o

Submitted by Gopinath Venkatesan on

I came across this web page recently, and it talks about a novel product d3o that can control impact effects by adjusting molecular structure in case of shock loads. If this material becomes a regular apparel material, we may see many Jackie Chans in the future. The material is d3o.

Visit this page to learn more about this material, This is not a SPAM. http://www.d3o.com/index.php

I don't know if you guys knew of this. I guess you do. Is this material really the way it is advertised, or some boasting included?

Looking for suggestions and comments on PhD research Project

Submitted by shengke zhi on

Dear Researchers and Industry Engineers, 

In this letter I am looking for some comments and industrial supports for my PhD research on non-contact measurement for machinery maintenance.