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Wing flutter analysis using fluid structure interaction technique


I am trying to do flutter analysis for a wing using fluid structure interaction technique. I know that I need to do simultaneous coupling but couldn't figure out how to do it. Can anyone here give some more detail guide on how I should do it. I am using ANSYS and ANSYS CFX. There is tutorial that come with the software but it is not about flutter analysis.



plate buckling problems using abaqus

hi i am doing my PG project on plate buckling analysis using abaqus but i struck in initial stage.. to do so please help me...

from NIT calicut , need help in Ansys modeling cracks in offshore tubular joints

hi everyone,

i am doing my masters in offshore structures, as part of my thesis work i am  doing fatigue analysis of offshore tubular joints. So , i have modeled the typical joints( T joint, K joint and Y joint) in ansys, now i have to model the cracks to find stress intensity factors, then i ahve to estimate fatigue life.

 Can anybody pls tell me how to model the crack in Ansys classic, if u have any tutorials or examples please send me.

my mail-id

thanking you all 

Career after the Ph.D.


I'm an Engineer and a Ph.D. student in Applied Maths, working in the field of Nonlinear Finite Elements for Elasticity. I often think about my future career since, by now, I have a strong experience with coding FE in C++/Matlab/Mathematica, but no clue whatsoever about commercial black-box softwares for FEA. I'm worried about this, since most of the job vacancies from the industry (I'm not interested in pursuing the Academic career) seem to require only experience with a specific software and application, and not to directly code FE.

Fracture toughness is equal to fracture energy in LEFM?


I am doing some test on the fracture toughness.

I am wondering if in Linear Elastic Fracture Mechanics, Fracture toughness of the material is equal to fracture energy or not?

Can anybody send me an naswer,

Thank you,


Mike Ciavarella's picture

statistics about students in world universities

dear Friend

I am comparing italian universities with Russian ones with US and with Cuban ones. Then I need some figures.

I have been able for example to find that there are about 50% of students-workers in Russia, what about US?
I mean full time workers, not just part time.

mmalekan's picture

Fatigue Crack Closure simulation with interface element

Hi Everyone,

 I'm a M.Sc. student of mechanical engineering. my thesis is fatigue crack closure simulation with interface element. I don't know how start with interface (cohesive) element. I need some fundamental text on interface element.

If anybody knows about these topics, I would appreciate for helping me.

Most thanks.

M. Malekan

Zhigang Suo's picture

PhD Winterschool on Dielectric Elastomer Transducers

I’ve just come back from a Winter School on Dielectric Elastomer Transducers, held at Monte Verità, Ascona, Switzerland, 10-16 January 2010.  Lectures were given by various people, covering the theory of electromechanical interaction, design of devices, development of materials, and technologies of manufacturing.  I was asked to give three lectures on the theory.  I attach the slides of my lectures.

Yonggang Huang's picture

NSF Summer Institute Short Course on Mechanics of Soft Materials

NSF Summer Institute Short Course on

Mechanics of Soft Materials

Co-sponsored by
The Intrenational Union of Theoretical & Applied Mechanics (IUTAM) and
The US National Committee of Theoretical and Applied Mechanics (US/NCTAM)

Organizers: Yonggang Huang and Wing Kim Liu, Northwestern University

Hilton Garden Inn, 1818 Maple Avenue, Evanston, Illinois, 60201
Dates: May 10 (Monday) morning to May 12 (Wednesday) morning 2010

ladanyi's picture

How to define pressure direction in ANSYS

Hi everyone,


I am quite new in ANSYS Classic and now I had to realize a serious problem. After building a steel frame from beam4 elements I tried to define pressure on beams.

I can not find the direction of the pressure. It could work in or perpendicular to the plane of the frame (for example).

Could anybody help me, how to define the direction?

Study Case of Crack Pipe

I want to try analyze cracked pipe based on API 579 fro my study. Is there anyone who have study case about cracked Pipe? Please send it to my email

Partial Dislocation Tutorial for FCC Metals

It is well known thatdislocations in FCC metals are composed of partial dislocations separated bystacking faults.  When consideringthe reactions of dislocations with each other, such as in DD simulations, it is necessary to determine therelative positions of the partials in order to correctly describe theconfigurations that are created in the reactions.  Here we describe a geometric method for correctly determiningthe relative positions of the partials. The results we obtain can also be found by applying an axiom, or rule,given in the book by Hirth and Lothe. At the end of this tutorial we

asit_rathod1's picture

Material Property Values

Dear All

I want to knnow what is the Strain VAlues at the SA-387(or 11/4 Cr 1/2 Mo Ni Si) plate at 940'F and in creep RAnge at time of 1000000 Hrs of to find Strain Values at SAme TEmp & Time and Diff loading of mtrls like 10,100, 1000 and So on..

Please Help...


Asit Rathod

export fe model from Abaqus to Ansys


is there anybody know how i can export a model from abaqus to ansys?

thank you Smile

best regards,

GOPALAERO2000's picture

Residual stress measurement

Hi Everyone,

 I would like to measure the residual stress imposed pattern through thickness of the plate by forming process (bending). Is it possible?

 I came to know that residual stress measurement through HOLE DRILLING METHOD offers only on the surface. That too, applicable only when residual stress imposed is uniform through thickness (like shot blasting process). If any one came across the experience of residual stress measurement, please throw some light in this regard.

 Thanks in advance

 M Gopalakrishnan

asit_rathod1's picture

Stress Defination

Hello All//

I am always confuing on that Stress is a point Function..and not Seen Physically Than Stress is a material Property or Material Behaviour?

Waiting For Answer..


Help regarding Tutorials on Creep using Abaqus

Choose a channel featured in the header of iMechanica: 

My research area is modeling of creep in MMC. I am trying to use Abaqus for this purpose but I am unable to find any tutorial that can provide me some help that how to use creep module provided in Abaqus. Will any body can help me by providing some tutorial related to that topic. It will be highly apprecioated.



Project Tuva (Feynman's lecture series)

Here is an interesting link I came across while searching for the Feynman lectures -- Project Tuva.

It provides each of Prof. Feynman's seven lectures delivered at Cornell as a part of the Messenger lecture series. This format of posting lectures by Microsoft is absolutely amazing. I hope more such lectures especially videos of keynote lectures in leading conferences and congresses can be made available online.


Apply pressure load

How can you apply a pressure, not normal to a angled face in a 3D model in Abaqus? Is that possible? See sketch:      P --> /


Multiple cracks in ansys

One way of modelling multiple cracks in Ansys.

Taxonomy upgrade extras: 

enthalpy use

respected sir/madam

                              i have probla, how we put temp. depent. enthalpy valu in material type

modelling of rectangular composite plates using ANSYS

I have to analyse the carbon/epoxy composite laminate in ANSYS,  to determine the natural frequency of rectangular composite plates. The plate is simply supported . I  am not able to model the composite lay up with the correct orientation of the fibre. so any body have the step by step procedure for modelling the composite lay up in ANSYS and how to determine natural frequencies  please give it to me on my e-mail:

Two-point Tensors

I am confused about the use of two-point tensors in elasticity. The deformation tensor F and first PK tensor are two point tensors, and the "two-point" property arises from use of two different Coordinate System When a continuum body is deformed, why it is necessary to move the Coordinate System as well? (or alternatively, why the coordinate system is attached to the body itself??, isn't it possible to use a general coordinate system which can represent the deformations and also account for the rigid body rotations of the continuum body?).

free vibration mode shapes of beam (other than pinned-pinned) and finite strip method

Choose a channel featured in the header of iMechanica: 

Hi everyone.

I'm working on my master thesis, dynamic analysis of plates using finite strip method.

I have found one problem (among others) that could be interesting to community.

In the attachment you can find example from Mathematica. There is 21 mode shapes of clamped-clamped beam. Recently i noticed that formulation given in every book about dynamics (Timoshenko, for example) isn't valid for higher modes for any beam that isn't pinned on both ends.


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