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Can anyone give a definition about strain energy density for a plate? When a plate under a uniform stretch s, some gives an equation like ek=Es2/2(1+μ)(1-2μ), some gives ek=Es2/2. What are the difference of these two definition? Please note both of the cases are for plane stress conditions. If under plane strain conditions, what is the definition for its strain energy density? Thanks for help.

Hi, dear friends,

 I am new  to i-mechanica and working for a reaserch institute for steam and Gas turbine in Aachen,Germany. I am doing Modal  analysis of a Gas turbine matrix burner and want to find out the diffrent mode shapes and the frequency. My problem is, I want to impose a temperature field of round about 1800°C which I will extract from CFD results. SO I would be grateful if any one can tell me how can I impose temperature field to get this modes and frequency because this things are influenced by temperature.

Have a nice day 

Thanking you ,

Hi,

I am uisng ABAQUS 6.7/Standard to simulate gear pairs (only static). At a moment I am only taking 2D, so I am using plane strain with quad elements. My problem is how to chnage the mesh refinment with respect to the gears postion, specially on the contact area? 

Thank you in advance for any help 

salut, je veux des docs que m'aide à maitriser le logiciel ABAQUS, est ce vous pouver m'aider,,, merci d'avance

hi,

i am satish. i am trying to calculate interference stress in interference fit with following dimensions.there is a difference b/w analytical and simulated results. here i am giving dimensions kindly inform to me the values of von misses and pressure at intereference.

shaft od=938.7378, core id=937.8, and core od=1138.2

E=2.1e5,m=.29and coe.of friction=.14

please... help me...

Thanks

satish

I am a second year undergraduate student of IIT Bombay (www.iitb.ac.in).In the coming summer, we are supposed to undertake an internship with an industrial establishment or a research lab of repute, in or out of India.

NANOSHEL makes more than 50 types of products, among which the main products are nanotubes, SWCNT´s, MWCNT´s, nanoparticles,. These products are widely used in the fields such as textile industry, ceramics, chemical fiber, plastics, coatings, cosmetics, rubber, electrical and electronic equipments, electric power generation and boiler and so on.

Hi,

 I have cyclic uniaxial compression data of a PU.  When I look at nominal stress vs nominal strain then the relation is clearly nonlinear (increasing stiffnes with increasing  strain).  When I convert to true stress vs true strain I still have a nonlinear relation, however, not as strong and the stiffness decreases with increasing strain.
When I look at true stress vs stretch, however, the relation seems to be almost (I'm only talking about the first loading cycle) linear. Nominal stress vs stretch is still nonlinear. 

I plan to use UMAT to do some simulations on soft tissue. Since I do not have experiences on this, I hope to find some example UMAT code to start with, especially on the thermo-elasto-pelastic models. I searched from google.com, but can not find useful information. Is there any resource on UMAT fortran code for downloading? Thank you very much.

what softwares can be used to predict the fatigue in Multi body dynamics problems

the information is needed for the post graduate thesis work