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[David Zhang <question243909@xxxxxxxxxxxxxxxxxxxxx>]

New question #243909 on Yade:
https://answers.launchpad.net/yade/+question/243909

Hello everyone,

I am new to Yade. I have been working on FEM for quite a while but have little knowledge of DEM. 

There are a few nice videos of representing beams, wires, grids, with connected cylinders in the Yade/wiki/examples. I am very interested in those simulations and would like to know more, such as  the physical meaning and mechanical formulation behind them. I have searched the Yade website and couldn't find too much relevant messages. I guess my question is probably too general and let me make them more specific as below.

1) If I am correct, a wire or beam  is created by connecting a series of cylinders and particles. Apart from geometry, what is the difference between a cylinder and a particle? What are the interactions defined between a particle and a cylinder for a wire or a beam model in Yade?

2) What is the typical  length scales for a cylinder and a particle in a wire or beam model? 

3) I guess a wire or beam model  has much less elements than a solid model. Is the computation time much less as well? Is a fast desktop good enough to perform the simulations shown in the examples?

Can anyone shed me some light on these questions? 

Many thanks and best wishes,

David

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