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[img_assist|nid=4271|title=Finished Bashring|desc=|link=popup|align=right|width=100|height=75][img_assist|nid=4272|title=Unfinished Bashring Mounted on Crank|desc=|link=popup|align=right|width=100|height=75]

Project Description:

The biology of the inversion process in Volvox carteri is examined, and a coupled mechanical and kinetic model is proposed.  See attached proposal for details. The presentation given is also attached here, as well as the final paper.  Also, a movie of the simulation that made all of the work wroth while, the inversion of a half-sphere, is attached here as well.  Note: The file inversion2bw.doc is a movie, just download it and change the extension to .avi.  This has to be done since iMechanica doesn't allow attachment of .avi files directly.

Dear every body,

I want to make experiment to find out cofficient of friction between two metal (steel), what is the ASTM code accord with that case?

Please help me

Regards,

Joni Jon

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. 

Hello!!I am a new user of ABAQUS. I have a question about obtaining of the frequency response function in ABAQUS. In the first step I calculate the natural frequency using the step linear perturbation(procedure type)/frequency.I think that obtaining the frecuency response function, I need to use in the second step the steady-state dinamic,modal.I don`t get to plot the amplitude of modal-frequency graphs.I would apreciate much if someone could help me about this question.

I am modeling a RBC(red blood cell) membrane using shell181 element and
using neo hookean model. But when I try to solve it, it gives error. I
couldnt figure out the cause. Please help me.
This is my input file for creating the model.
/com,structural,,,
/clear,start,,,
/prep7,,,,
k,1,0,0,0.000000405
k,201,0,0,-0.000000405
k,2,0,0.00000005,4.06E-07
k,202,0,0.00000005,-4.06E-07
k,3,0,0.0000001,4.07E-07
k,203,0,0.0000001,-4.07E-07
k,4,0,0.00000015,4.10E-07
k,204,0,0.00000015,-4.10E-07
k,5,0,0.0000002,4.15E-07
k,205,0,0.0000002,-4.15E-07
k,6,0,0.00000025,4.20E-07
k,206,0,0.00000025,-4.20E-07
k,7,0,0.0000003,4.27E-07
k,207,0,0.0000003,-4.27E-07
k,8,0,0.00000035,4.34E-07
k,208,0,0.00000035,-4.34E-07
k,9,0,0.0000004,4.43E-07
k,209,0,0.0000004,-4.43E-07

Computer assignment #2 : natural frequency problem

due on Monday (Nov. 17, 2008)

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

Thanks to Marino, I have found the reason for the difference in our bending stiffness calculation. The original discussion is here:
node/4029

Can any body give me source links to the basic formulation of the angle term of Modified Morse Potential, which gives the bond energy due to bond angle bending.

Angle term of the Modified Morse Potential is provided through the below paper.

I have been working in Numerical Simulation for sometime and would like to work with people who are familar with numerical simulation and are working for a certain paper right now or planning to work. I am located in Ethiopia. I am not  familiar with the research community, and instructor in one of the  university  in the country. If you are interested, I am eager to work. As it is one way of helping me  to introduce my self to the research community, while working on a certain paper, and further opens a way for addition works. 

Thanks 

My own DEM(Discrete Element Method) program's solution for static problem seems strange.

I use my program to calculate the displacement of a cantilever under static pressure:

1. it seems my program shows convergence for static problem as the mesh gets denser. As the mesh grows denser(that means the particle becomes smaller), the displacement(of y direction)  of the free tip becomes smaller.

Hello,

I have to design the body of a truck. I need some documents such as standards, practical recommendations, papers that could help me for the calculation of different type of loads applied to the structure of the body. This could be wind, gravity, acceleration, etc. Could you please help me by giving some information.

Thanks in advance,

Goli

Hello,

I try to enter a triangular load on an area. I have entrered the gradient information in settings. But when I try to apply load on area, it does not take it in triangular form, but in constant form. It works  with apply on nodes. But, is the result correct with this option?