iMechanica - job - Comments

Re: study mechanics at Harvard

Zhigang Suo — Thu, 09 Feb 2012 05:47:06 -0500

Hi: I have not worked in the area you've mentioned. But many areas of theoretical mechanics are interconnected. Skills picked in doing one project will be useful in doing other projects.

Each year we have a large number of applicants, but we only have space to admit a small fraction of applicants. The admission is done on a competitive basis.

Stable Time Increment

M. Jahanshahi — Wed, 08 Feb 2012 01:46:38 -0500

A stable time increment is the one that leads to the convergence of algorithm. So if the algorithm does not converge you should consider a smaller time step. If the algorithm does not converge by consecutively cutting time steps then you should expect some sort of instability in your model.

Mohsen

stable time increment

cmksiva — Wed, 08 Feb 2012 00:28:02 -0500

Dear All,

Could anyone explain what is stable time increment in explicit, why it is used?

Regards,
Shiva

stable time increment

cmksiva — Wed, 08 Feb 2012 00:28:01 -0500

Dear All,

Could anyone explain what is stable time increment in explicit, why it is used?

Regards,
Shiva

Central Difference

M. Jahanshahi — Tue, 07 Feb 2012 06:12:11 -0500

Dear Shiva,

The role is to use the expressions

df/dt = [f(t_n+1) - f(t_n)]/h or df/dt = [f(t_n) - f(t_n-1)]/h

d^2(f)/dt = [f(t_n+1) - 2f(t_n) + f(t_n-1)]/(h^2) with h being the step size

to approximate the derivatives of a function with its differences and thus
replace a given differential equation with its difference equation. In this
manner you can turn a system of differential equations into a system of
algebraic equations in the value of function at various time steps and
therefore obtain an approximate solution. This method or variations of it are
used in commercial softwares to solve the set of governing differential
equations.

Mohsen

My question is what's the

cmksiva — Tue, 07 Feb 2012 00:23:44 -0500

My question is what's the role played by central differnce operator in dynamic explicit analysis?

Regards,
Shiva

Re: Could you please give me a PHD position?

ULB-BATir — Mon, 06 Feb 2012 03:25:05 -0500

Dear Sir,

We do not have open PhD positions now, but please have a regular look at our website for any new positions:

http://batir.ulb.ac.be/jobs.html

Best regards,

Prof. Rajan Filomeno Coelho.

Hello Sir, wanting to know about PhD study more

tanmay-mandal — Sat, 04 Feb 2012 05:21:16 -0500

Hello Sir,

The thread is much more than just useful which prompted me to write in to you.

I will be completing my master's this year and is enthusiastically in search of researchers who are working in theoretical aspect of solid mechanics. What I learn till now is that this field is gradually becoming saturated, though there might be areas that are yet untapped. Do correct me if I am wrong. Sir, my master's thesis focuses on studying the effect of nonlocal elasticity to predict the vibrational mechanics in single-walled carbon nanotubes (cylinder and sphere).

Please let me know of any oppurtunity for me to work on theoretical area at Harvard.

Tanmay Mandal

IIT Kanpur (India)

about your question

Hengxu Song — Sat, 04 Feb 2012 01:48:40 -0500

I don't understand your question. central difference method is the foundation of explicit analysis, it's nothing to do with abaqus. i suggest you to read more about explicit analysis, you should know what is explicit well first.

for xplicit dynamics

cmksiva — Thu, 02 Feb 2012 01:31:48 -0500

Dear Muzamil,

Can you please tell me what are all the process occuring during explicit analysis like why we are giving stable time increment?for what mass scaling is used?

Regards,
Shiva

For explicit dynamics, you

muzamil72003 — Wed, 01 Feb 2012 23:30:28 -0500

For explicit dynamics, you can define explicit under mesh section (element type).

You can select either standard or explicit.

Thanks for sharing

PhD student in mechanical

pschiavone — Wed, 01 Feb 2012 12:15:31 -0500

PhD student in mechanical engineering sciences

applied mathematics; solid mechanics

pschiavone — Wed, 01 Feb 2012 12:14:50 -0500

Looking for a PhD student in Mechanical Engineering Sciences

We only accept applications for admission in the Fall

Zhigang Suo — Mon, 23 Jan 2012 07:38:56 -0500

We only accept applications for admission in the Fall.

Last calls - only 3 days left to apply:9phd positions in Bari!

Mike Ciavarella — Sun, 22 Jan 2012 21:49:58 -0500

Please send us the application urgently using this format .

Notice that it implies paying eu25.82 of tax, by bank transfer. And that you must apply specifying the chosen field PHD PROGRAM IN MECHANICAL AND MANAGEMENT ENGINEERING, that you take the test online (provide us the skype data) and the application form requirements.

DEADLINE 26 January do not forget. In emergency, send us the application via fax +390805962811 or via email at mciava @ poliba . it

Michele Ciavarella, Politecnico di BARI - Italy, Rector's delegate.
http://poliba.academia.edu/micheleciavarella