# education

## Help Regarding PhD opportunities

Hi Suo and other guys,

I am Chennakesava. I am new to this site. I have completed my Masters in Mechanical Engineering from Indian Institute of Technology, Kanpur, India. (IITK) . Year of study is 2006-08. My specialization is Solid Mechanics & Design. Right now am working in GE, India. I want to pursue doctoral degree in the field of Dynamics and Vibrations and related issues like, Rotor dynamics, Smart structures, MEMS, Nonlinear dynamics and Chaos. Its kind of a dream to me.

## Query on transformation representing deformation fo space , change of basis and orthogonal nature

Hello All
I am trying to read the text book Tensor analysis by IS Sokolnikoff and stuck in
chaper 1, there is some confusion in my mind regarding orthogonal transformations,
change of basis and and a transformation representing deformation of space.
Please bear with me if my confusions are unfounded.
1) Is is safe to say that transformation representing deformation of space acts on
vectors where as transformations representing the change of basis acts on
components?. (if yes then the following questions are resolved and need not be
looked)
2) Sokolnikoff builds up the reasoning for orthogonal transformations based on
deformation of space (i.e orthogonal transofrmations keep the length of vector

## Strain Energy Derivation

Dear Sirs,

I'm trying to derive an strain energy in a small volume 2a x 2b x 2t.

I can derive "The rest terms are ommited" by myself .

By the way, I can't derive the DT2 term in the 2nd row of the figure.

Thanks,

Jin Kim

## Modeling bone and implant

I'm working with multiple meshed items and attempting to cut them using the Instance boolean operation. My parts include parts I've sketched & meshed in Abaqus and a 3D object I imported from MIMICS (.inp file). When I attempt to selectively cut the instances that overlap, Abaqus failed. Any suggestions on the modeling of bone and implant with a reasonable fit in geometry?

## Composites modeling

Hi i want to model a compsoite shaft of glass/epoxy .i am having all material properties .i want to know how to model it .and in another case there is adhesives between the two.

Thanks,

pankaj

## suggestion on a project.............

hii every one ... i am an  undergraduate student in mechanical enggineering . can any 1 suggest me a good project which includes  1.both computer oriented and also lab oriented project.

2.  also a  project in fatigue analysis.

## Different Stress Values between brick, beam and hand calculation?

Hello Everyone,

I have run a simple beam simulation of a cantilever pipe. I calcualted it with 8-Node brick elements, beam elements and hand calculation. At the up and low edge of the beam connection to the wall, I got maximum stress values as expected. While the beam and hand calculation results are similar  (40 MPa), brick element calculation is higher. (50Mpa). Interestingly the finer the mesh of brick elements the higher the stress values. I couldnt figure out the reason of it. Can any one say a comment?

Murat

thanks a lot

Iam beginner in ansys, so i have problem in enter the steps of cyclic load to a plate as solved in ansys to get the deformation with time curve.

can any help me??

Hi everyone,

I am working on a personal Fatigue Analysis code that read nodes and stresses from FE processors. I would like to read the NASTRAN .op2 output  file. Does anyone know about the structure of this kind of file?

Thanks,

## concrete model does not converge

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Hello,

I am working on a simple concrete model. The model fails
to converge for relatively smaller loads. I am not very proficient with
abaqus. If someone can tell me what to tweak to get it running, I'll be
grateful.

Please take a look at the inp file attached.
regards
Dinesh

## FEA of Crack Propagation

Hi all,I'm a student of of Madras Institute of Technology, Chennai.I'm trying to do stress intensity based crack propagation in metals. I’m using Abaqus/CAE. I’m following the abaqus 6.5 documentation, I have completed upto Contour integral evaluation,” (Section 7.10.2).

## Partial Differential Equations for Scientists and Engineers

Hello,

I am an instructor who teaches the partial differential equatioin for mechanical engineering students at Myong Ji University in South Korea using the book, "partial differential equations for scientists and engineers" written by Prof. Stanley J. Farlow.

Luckly our department professor handed me over a copy of solution manual but which was not completed. Thus I wonder if anyone has a complete solution manual for this book. It will be grateful if I may be able to obtain a complete solution manual.

Thank you very much,

Young June Yoon

## Mixed formulation

Dear All

Does anybody have this paper?.

On some variational principles in the theory of elasticity and the theory of plasticity

HC Hu - Scientia Sinica, 1955

Thank you

Sreekanth