Notes on structural dynamics

If any one has notes or reference to website for learning structural dynamics, kindly help me out

Ajit R. Jadhav's picture

M Tech/ME and B Tech/BE Projects Available in Pune (Mech., CS, etc.)

I have quite a few ideas for MTech/ME/BTech/BE degree projects. The projects may be suitable in many different branches, including Mechanical, Computer Science, Metallurgical, Aerospace, Civil, etc. (In a few cases, MSc/M Phil students of departments like Physics or Computer Modeling and Simulation would be suitable too.)

All these projects are available for the new academic year (2008-09), at Pune, India.

Students from COEP and IIT Bombay are encouraged to apply. Others, please go through the document available here before getting in touch with me. In any case, there are no stipends/assistantships to go with these.


Dear All,

 I need to know which software that is better  for impact simulation of composites ANSYS or ABAQUS. Which one is more friendly to use as  I am new in software stuffs.


Thank you.



Plane stress with thickness

Plane stress with thickness

How to model a unit cell on ABAQUS

Hi. Please i want to know (from basics) how to model a unit cell and assign it properties as i need this for my ongoing dissertation.


Hello ALL,

Any sort of help related 3d fracture analysis.



Cai Wei's picture

Lecture notes on "Elasticity" and "Statistical Mechanics"

The lecture notes of the two courses I taught at Stanford University during the last two quarters, "ME 340 Elasticity" and "ME 334 Introduction to Statistical Mechanics", are available in PDF format online at:

Perhaps it could be useful to you.

Mike Ciavarella's picture

A crucial text from Jim Rice of his Timoshenko's medal speach.

It is difficult to reminisce over my own formative years without sensing
the sharp contrast with the far more difficult situation faced by the
young generation today. My generation, and especially my own narrow age
range within that generation, had things easier, I think, than any group
before or after. I entered Lehigh for undergraduate studies one year
after Sputnik. It was a time when support for science and engineering
was enlarging fast, when opportunities were abundant. There were plenty
of graduate fellowships. There were also generous loan programs, fully
forgivable for those who went into teaching. I had both at Lehigh, where
I also stayed for graduate studies. Getting a postdoc position could be

institutes eor autocad

sir, i am a student of mech engg and i want to know about the institutes in delhi that offers short term couses for autocad and proe

Difference b/w ref pt and datum pt in ABACUS??

what is the Difference b/w ref pt and datum pt in ABACUS??

MichelleLOyen's picture

Web 2.0 and Medicine

I stumbled across this interesting blog post yesterday concerning an upcoming course on medicine via web 2.0.   It appeared quite interesting from several perspectives: first, medicine is often associated with being behind the times on technology but this all looks pretty current, secondly it may be the most comprehensive listing of topics I have seen where web 2.0 is applied to a single discipline, and finally it made me wonder what more we could do with mechanics via web 2.0 beyond just the current features that drive iMechanica!

zhan-sheng guo's picture

Professor Zhigang will give lectures at Tongji University, Shanghai China

from the prof. Ying Dai:

Prof. Zhigang will give two lectures on 1:45pm, 29 May, 2008 at Tongji University, Shanghai China.

Position is the second floor meeting room of Run Run Shaw building.

 1. from Learning Harvard University to The National Academy of Engineering (NAE) of American

2.  Mechanics of Soft Active Materials

Composite Modelling in Abaqus


 Pardon my basic question.  I need to model a carbon fibre sheet using Abaqus 6.7.  I cannot seem to get the composite layup tool to work properly and I do not know how to define the material properties for carbon fibre.  Are there any good online turorials I can use to do this?  My part will be 8-ply, 125mm square, ~1mm thinck.  Any help is appreciated.





help me


i m b.e. iv year student  and i do project on fracture behaviour of joints using ansys. and i have just basic knowledge of ansys so plz provide me sufficient information.


i will be very grateful to you.   

Zhigang Suo's picture

Mechanics of Soft Active Materials

At the invitation of David Clarke on behalf of the UCSB/Los Alamos Institute of Multiscale Materials and Structures, I gave the following three lectures:

  1. Large deformation and instability in dielectric elastomers
  2. Large deformation and instability in swelling polymeric gels
  3. Mechanics and electrochemistry of polyelectrolyte gels

The abstracts follow, and the slides are attached at the end of this post.

Rotating Beams/Frequencies/Errors/Abaqus input file attached

Im trying to model a rotating uniform beam for 12 rotational speeds in Abaqus using c3d20 elements. As expected, "step 1 to step 5" the frequencies increase as the rotational speed is increased. However, for some strange reason, the frequencies stop varying from the fifth speed. I do get warning messages when running the input file but i cant intepret them well since Im new to Abaqus.

I believe the problem is elementary but i cant figure it out. Can anyone review or run the attached input file to let me know what I  am not doing or what exactly is wrong.

Many thanks.

D Jackson


Scaling of fracture strength, fracture energy and toughness is an important issue when it comes to predicting the behaviour of large-scale structures on the basis of laboratory scale measurements. Historically the work of Leonardo da Vinci and Gallileo is well known, followed by the statistical weakest link theory derived by Weibull in 1939. Weibull scaling is a statistical approach assuming instantaneous failure when the weakest link in a material structure fails.

srinivasdv's picture

how to apply cyclic loading in ABAQUS (for determing the DEFORMATION MODULUS from PLATE LOADING TEST down a DRILL HOLE

hi to all,

this is srinivas from IITROORKEE presently doing M.Tech in CIVIL Engg .

my project is

determing the deformation modulus using plate loading test down a drill hole.


Journal paper

Hi every one,

    Iam searching for the paper 

    "  charalambides P.G. ,J. Lund, A.G. Evans and R.M. McMeeking(1989),  A test Specimen for determing fracture resistance of     bimaterial interfaces . Journal of Applied mechanics, volume :56, pages 77-82. "

     Iam unable to find this paper. I need this paper for my thesis work. Is there any one find this copy please attach the copy.

Modeling DCB Specimen using Ansys to determine Energy Release Rate



         Iam working on ansys modelling of DCB specimen to determine the energy release rate. Ihave modeled a CT specimen and determined its SIF. Is it right way to model the DCB by changing the dimensions of CT specimen and making it a DCB specimen?..

How can i find out energy release rate of the specimen?

Iam pretty new to Ansys


Problem is using static/riks option

I have some problem in defining the material properties using UMAT. I want to simulate the cubic stress-strain traction-sepration law. Solution doesn't converge after max load is applied (i.e zero slope of stress-strain plot). I am using riks solver. I have written my stress -strain relationship as below in UMAT file. Please tell me how to converge the solution even after zero slope of stress-strain relationship. Can i make my load factor(lambda) negative in riks option.

Mahdi Kazemzadeh's picture


This is a great news for all students here in iMechanica! The formation of a study group which will focus on the basic concepts and the facts of daily research, the simple tools that any of us will need at a certain stage. Please see blow the formation of this idea and add your comment, it would be good to know other points of view as we can improve the initial idea step by step.

Carl T. Herakovich's picture

Berger on Video Solutions for Teaching Mechanics

Professor Ed Berger, Univeristy of Virginia Mechanical Engineering, is featured in the Chronicle of Higher Education for his use of web technologies and, in particular, "video solutions" for teaching undergraduate mechanics courses. See  Or contact Berger at  Ed hasn't used this approach for all undergraduate mechanics courses as yet, but the potential is there. 

cbrinson's picture

New Book on Polymers and Viscoelasticity

I wish to inform the imechanica community about my recent book,  Polymer Engineering Science and Viscoelasticity, Springer, 2008. THe book starts at the beginning and contains both the physics of polymers and the mathematics of viscoelasticity. It is also unique in the history of mechanics in being the (first ever?) father-daughter book. Those interested in polymer mechanics may find this a useful resource! It may be found in your library or further information can be found here

shaofanli's picture

New Graduate Textbook on Micromechanics and Nanomechanics

World Scientific Pub. Co. will soon (2008 Winter) publish a new graduate textbook on Micromechanics and Nanomechanics.  The book is based on a lecture notes that have been used in Berkeley for seven years. Reading of book requires minimum knowledge of continuum mechanics and mathematics, and the book is intended for the first year graduate students as well as those practitioners who have no time to read the literature for self-study.

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