iMechanica

Dear all

I am searching for procedure to calculate stress intensity factor of bonded repair of cracked plate, so any one has any idea how to calculate stress intensity factor in 3D crack model By ANSYS, please guide me. I need your help.

Looking for your help.

Please share your valuable documents at:-

himanshu@iitp.ac.in

hpiitp@gmail.com

Once every four years, the International Union of Theoretical and Applied Mechanics (IUTAM) holds a Congress, the International Congress of Theoretical and Applied Mechanics (ICTAM). 

Important dates: 

31 July 2010 Abstract submission (abstract on one page)   

15 Aug. 2010 Abstract acceptance  

30 Aug. 2010 Early registration  

30 Sept. 2010 Full manuscript submission (full paper on six pages)

Dear iMechanica commmunity,

we are looking for 3 PhD students at Oxford, starting from the 1st of October 2010 or as soon as possible thereafter. The closing date for the application is the 26th of July. The 3 students are required for two different research projects, namely:

1) Underwater blast on composite structures - open only to EU nationals; 2 PhD students are required. The studentships are advertised here

Dielectric elastomer, as an important category of electroactive polymers, is known to have viscoelastic properties that strongly affect its dynamic performance and limit its application. Very few models accounting for the effects of both electrostatics and viscoelasticity exist in the literature, and even fewer are capable of making reliable predictions under general loads and constraints. Based on the principals of nonequilibrium thermodynamics, this paper develops a field theory that fully couples the large inelastic deformations and electric fields in deformable dielectrics.

The Piezoelectric Device Laboratory has immediate opennings for recent PhDs.  We are engaged in researchs in piezoeelctric acoustic wave resonators with supports from government and indsutry.  The Laboratory has been grwoing and we would like to have new members to accelerate the pace and expand collaborations with the fast growing piezoelectric acoustic wave device industry in China and other countries.

Hi friends,

I am studying about cyclic behaviour  of steel-concrete composite column. When i am giving material properties of steel, i have doubt  about Isotrophic Hardening and Kinematic Hardening, which one i have to use to get cyclic behaviour of column.

 Thank You

R.Velmurugan

Hello All,

I am modeling helical spring wounded on the surface of cylindrical shell. High aspect ratio of helical wire creates problem in meshing. please help me in selecting the element and meshing.

Thanks

J. M 

Hello to all the research scholars. Sir, I am a Phd student in computational fracture mechanics. Right now i am stuck with a problem where i am not able analyze SIF (K1, K2, K3) for a 3D crack in ansys. Ansys asks the path for K value and i am choosing 5 nodes along the 2 crack edges for a full crack model and I also went for both global coordinate system and local coordinate system for finding K. Finally when i went to nodal calc and SIF then it is giving only plane stress and plane strain conditions with full or half crack models. But I am not able to get SIF on the crack front as i am not choosing the path along the crack front. It is only giving SIF at the crack tip considering only the area. Am i not correct or does ansys has limitations on this. Please guide me in this.

Where I can find the subroutine of a user material Fortran code for Viscoelastic constitutive model?

Does anyone has the subroutine for LS-DYNA ?

Can anyone help me?

HI！

CSTAM ASC  IEEE
2010 Symposium on Piezoelectricity, Acoustic Waves, and Device Applications

December 10-13, 2010, Xiamen, Fujian,
China

Website：http://piezo.xmu.edu.cn/spawda10

HI,

     I was just wondering how many S-N curves would i need to  define the fatigue properties of an anisotropic material. For an isotropic material we just use 1-curve. Would that also  be enough  for an anisotropic material? We need 21 elastic constants to define anisotropic material. Would the number of SN curves be similar or be somehow related to the number or would the number of S-N curves required would be probabilistic in nature. i.e. we find the S-N curves along several planes and get a some sort of probabilistic distibution. 

Atul Jain

I'm trying to understand elastic deformation using the Lie derivative. I've read a good summary on Wiki but want other sources to review. Can anyone offer any sources &/or explanations. I need something fairly basic. Thanks, John.

 I hope that the mecanicians can help me to solve my problem.

 Is there any possibility to match the frequences of the physical model to the mesurement data?

Hi, I'm Pietro, a short term Italian incoming student at VT (virginia tech).

My advisor, in order to start my thesis there about skin friction coefficients in a scramjet combustion chamber, gave me a Modal analysis to do on a gage described as follow:

a cantilever beam  (1mm diameter and 3cm long cylindrical shape) with 1mm depth and 1cm diameter cylindrical flat "hat" attached upon.

Base constraints: zero displacements, zero rotation

Two positions are currently opened in Cardiff: http://www.cardiff.ac.uk/jobs/engin/lecturer-in-civil-engineering-2-post...

 I strongly encourage imechanicians to apply.

 Best wishes,

Stephane

http://dx.doi.org/10.1088/1757-899X/10/1/012175

Abstract

Hello all,

I want to simulate Rolling Contact Fatigue in Ansys Multiphysics. I am
not sure whether we can perform this task in Ansys Multiphysics. Can
anybody help me regarding this? Is that possible to get S-N Curve as
result? Please help me..

-Anoop

Dear Colleagues,

Dear members,

I am a newbie in FEAP and I would like to perform transient heat transfer analysis followed by a series of static analysis using FEAP.  Where does FEAP save the temperature history from the transient analysis and how to use this as input for the static analysis? I am using user constitutive model and most of the material parameters are temperature dependent. Which file do I need to include?

Best regads,

Vivian Tini

Xiaodong Li, of the University of South Carolina, has graciously agreed to be a new Editor of the iMechanica Journal Club.  iMechanica has now over 20,000 registered users.  Xiaodong is one of the earliest active users (user number 48), and has played a large role in shaping the development of iMechanica.  He has been advocating for strong participation from experimentalists, and for highlighting significant applications of mechanics.