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Dr. Ranjan

May I get the technical difference ansys is having over abaqus or Nastran. Or may I ger the URL where I can get the information.

FEM error message


I have been struggling with the following error message in FEMLAB software: "The length of fem.appl(1).equ.ind must equal the number of domains in the geometry." I don't know exactly how to fix this error message. Would you please help me?

 Thank you, Yoon

Electromechanical screw driven Tensile machine

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I would like to know what is the role of data sampling, data capture rate and bandwidth in case of electromechanical static tensile test. What are their optimum values for a static tensile test of metals according to ASTM standards.

We are deciding to buy Instron 5567 series for 50kN. But we are unable to decide whether that high data acquisition rate, bandwidth is required. Please suggest.

Muskhelishvili's method of estimating USING COMPLEX POTENTIALS

I'm looking for resources for reading and studing concerning the Muskhelishvili's method of estimating the stresses and desplacement fields for singular states of stresses using complex potentials from given boundaries as they mentioned in Timoshenko's book 'theory of elasticity ' pages:203..209.

I tried in my school library and i found nothing.

Thanks in anycase

Ilias I. T.

Viscoelasticity in Abaqus

Hi All,

 I would like to use Abaqus to model the viscoelastic material  behaviour of a polymer.

I have material data from a simple uniaxial creep experiment (nominal strain vs time).  I tried to use the viscoelastic material model in Abaqus.  I am a bit confused as to how I need to enter my data (what format). 

The manual says I have to specify the normalized bulk and normalized shear compliance

ANSYS Simulation

Dear All,

 Is there a source of free material data property files for use in ANSYS Simulation? I am looking for a file representing the properties of Neodymium Iron Boron (38) (permanent magnet material) to apply to a simulation of a motor. 

 Thanks for any help!


composite materials

how to do  analysis of cmposite by ansys


Term paper writing

   Writing!!!!!!!! Writing!!!!!!!!!!!!! Writing!!!!!!!!!!!!!!!!!


Nowadays all of the institutions demand “paper” submission; this is a part of the academy. Even in the high school student, they want to submit some writing like coursework writing, for research students, undergraduate students, and post graduate students – all of the students are suffering to submit papers within the time.


Notes on structural dynamics

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

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.


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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

Taxonomy upgrade extras: 

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

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

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.


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.


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