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When using molecular dynamics simulations to study the variation of buckling strain versus aspect ratio of SWCNTs, is it necessary to keep the strain rate constant or displacement rate constant? Kindly appreciate your comments.

Dear all,

 My goal is the simulation of the fluid and gas flow in porus media. As the first step few CT scans using X-ray tomography where prepared. Next I have prepared the 3d geometry using ScanIP and ScanFE application. The purpose was to export direct geometry to COMSOL .mphbin format posted in node/2300 using the new feauture of Scan FE.  Unfurtunatelly I have receved an error that the object imported has no geometry. I would like to point also thank I havestrictly followed instructions in the ScanFE dialog window and I have tried all possibilites of exporting.

I have a friend who is studying to be a PHD in the Chemistry area, however, he needs to find new sponsorship to finalize his research, which is about AIDS.

Can anyone give him some ideas?

thanks

 <a href=http://www.erandolph.com>Chicago Resident</a>

It is a 3D cubic cell model out of a whole material,  and it is necessary to make sure that this cell can represent the whole material so the node forece of the corresponding nodes on the opposite surface should have the same value and opposite direction, but I have no idea about how to control the nodes force (maybe *EQUATION ?), because untill now all the boundary control method is about controlling the displacement. Does anybody know how? Thank you guys so much!

Hi,

with the Ansys Help I can see the graphic modes. But I need them as a vector (or the modal matrix) to get with the eigenfrequencies the mass matrix and the stiffnessmatrix of a dynamic system.

How can I import those modes for example into Matlab or into an excel program.

Can anyone explain what is main difference between Linear Viscoelasticity vs qlv (Quasi linear Viscoelasticity) proposed by Fung.  As far as I understand stress relaxation function and elastic response functions separated and given in convolution form which provides "strain rate independent" results in qlv application.  



Is linear viscoelastic description is strain dependent?

I love seeing the applications of our engineering accomplishments. The new KERS systems in the Formula 1 racing cars will hopefully bring interest to the common masses in regards to engineering, mechanics, electrical energy and hybrid technology development. Having this technology in the high visibility realm is sure to create positive ripples in our direction. They are adding a 80hp electrical motor between the fuel system and engine to add small bursts of power. This is powered generated from braking and stored in a ion-lithium battery pack. 

thanks a lot

Iam beginner in ansys, so i have problem in enter the steps of cyclic load to a plate as solved in ansys to get the deformation with time curve.

can any help me??