# education

## PHD psychology

Dear sir,

i am from Pakistan . i have done M.Phil psychology. now i want to do PhD from Germany but quite free of cost . can u guide me for that.

regards

kanwal

## ES 240 (Fall 2007) Homework 22-25

This problem set is due on Nov.2, 2007.

## About SIESTA MD Package

Hi

Is there anyboby to help me. Actually I am facing some problem during the use of SIESTA (Spanish Initiative for Electronic Simulations with Thousands of Atoms) package. The problem is that How to generate the Pseudopotential file. And the use of Vibra utility. During the use of Vibra package i cant able to run it properly.

## 15. Recommend a textbook that you think will help students in this course

Theory of Elasticity by Landau and Lifshitz.

content:
1 fundamental equations
2 the equilibrium of rods and plates
3 elastic waves
4 dislocations
5 thermal conduction and viscosity in solids
6 mechanics of liquid crystals

## plane stress problem in abaqus

hi all!

i am a new user of abaqus. i am trying a simple problem of a plate. the plate is made of composite material (orthotropic). i give all the properties correctly. but after submitting the job i get an error that 'laminate type- can be used with plane stress elemnts only'. how could i rectify this? can anyone tell me how to model a plane stress problem in abaqus? what is the significance of plane stress/strain thickness ratio.

## ES 240 (Fall 2007) Lecture Notes - Plane Elasticity - Part 2

Part 2 of Plane Elasticity notes. Please see attached.

## ES 240 (Fall 2007) Homework 19-21

This Problem Set is due on Friday, Oct. 26.

## Stress and Deformation: A handbook on tensors in geology by Gerard Oertel

Despite the title, the book covers very little specifically on geology.  It works through stress, strain, and other tensor quantities, but assumes you know little about the math.  Fully worked problems make up the bulk of the book following a few introcutory chapters.  I've found it a nice review of the math, but haven't fully explored the solution sections.  I got the book from Cabot Science Library here at Harvard. I wouldn't recommend buying it on amazon it's not worth the \$72, but it is a nice addition to Timoshenko's theory of elasticity.

## ES 240 student fall 2007

My undergraduate and master major is engineer mechanics. I have took several courses about this field, like theory of elasticity and mechanics of materials. But my major during master degree is plant bio-mechanics, especially the role of water surface tension and water transport. So I deeply feel that I need to learn solid mechanics again. That is why I choose this course.

## ES 240 (Fall 2007) Homework 15-18

This problem set is due on Friday, Oct. 19

## ES 240 (Fall 2007) Lecture Notes - Plane Elasticity - Part 1

Part 1 of Plane Elasticity notes. Please see attached.

## Boundary Element for Cavity Problem

Dear BEM experts:

I am trying to find a boundary element solution for the problem of a cavity in an infinte space. The boundary condition is such that the cavity boundary is subjected to a constant radial influx. I have used the standard fundamental solution for the interior case (finite domain). The results, I obtained for the potential were reasonable for points inside the exterior region. However, on the boundary, the results for the potential were in the order of 10^12 (instead of zero value)!! Any idea what went wrong. Thanks. Husain

## Boundary Element Method for the Cavity Problem

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Dear BEM experts:

I am trying to find a boundary element solution for the problem of a cavity in an infinte space. The boundary condition is such that the cavity boundary is subjected to a constant radial influx. I have used the standard fundamental solution for the interior case (finite domain). The results, I obtained for the potential were reasonable for points inside the exterior region. However, on the boundary, the results for the potential were in the order of 10^12 (instead of zero value)!!

Any idea what went wrong. Thanks.

Husain

## ES 240 Problem 6

I have got the master degree of Solid Mechanics in University of Science and Technology of China. Actually, I have taken several courses related to this subject, such as strength of materials and the theory of elasticity. So, my strength may be that I have some  knowledge about it, but my poor ability to solve PDE or even ODE could be the specific obstacle for studying this course. I will do research in Suo’s group(http://www.seas.harvard.edu/suo/), and my research may be related to soft matters, such as gels.

## Anisotropic Green's Function

Can anybody tell whether there is any closed form solution for Green's function in an anisotropic material? If yes it would be great if you share some of the literatures on this topic.

## ES 240 (Fall 2007) Lecture Notes - Elements of Elasticity - Part 4

Part 4 of Elements of Elasticity. Please see attached.

## ES 240 (Fall 2007) Homework 11-14

This problem set is due on Friday, Oct. 12.

## ES 240 problem 6

My name's Alison Forsyth, I'm a G2 biomedical engineer at Harvard.  I did my undergrad at Syracuse University where I majored in bioengineering.  Prior courses in solid mechanics are: mechanics of materials, materials processing and properties, and advanced biomechanics.

## ES 240 (Fall 2007) Office hour change

To all students in ES 240 this semester,

Due to popular demand my office hour is moved from Tuesday to Thursday 4~5pm starting from this week. The location is changed to Rm. 123, Maxwell Dworkin (33 Oxford Street).

Nanshu

## Hello

Hi,
I am currently working as a Design Engineer-CAE in Bangalore,India.Presently interested in doing a MS/Mtech in the field of Mechanical Design and analysis through a distance learning program/part time course.It would be great if someone suggests an university(in India/abroad) where these kind of courses are offered.
Regards,
Ankita

## ES 240 (Fall 2007) Homework 6-10

This problem set will be due on Friday, Oct. 4th.

## balance the advanced discussions and teaching activities in iMechanica

Dear Moderators:
Is there anyway not to show the posts from my class (including mine) on “recent comments”?

Too many student posts (around 170 students) and my discussions with them will crowd the space of the "recent comments" section, which should be reserved for more advanced discussions that come up.

Any other suggestions on the classroom behaviours that may not be appropriate for iMechanica?