Learning Forum

[2198215399]

Hi, which contact keyword should I use for the BEAM cell and SPH particle coupling process?

Please reply when you see it
Thank you!

[Alex R.]

Hello, 

It seems the current contacts do not account for node-to-beam contact. An alternative is to wrap the beams with null shells and use the node-to-surface contact between the sph nodes and the null shells. Another approach would be to change SPH to DEM; there is a keyword that allow coupling DEM-BEAM (*DEFINE_DE_TO_BEAM_COUPLING).

Alex 

[2198215399]

Thank you very much for your answer!
I would like to know if I set up the shell wrapped beam unit, will the reinforcement still have the effect of bond slip?
I will try the DEM below, will there be a significant difference between it and SPH?
Thank you

shuaipeng

[Alex R.]

Hello, 

I would like to know if I set up the shell wrapped beam unit, will the reinforcement still have the effect of bond slip? - Could you elaborate a little bit more about it? 

I will try the DEM below, will there be a significant difference between it and SPH? - DEM is implemented for calculations involving discrete spherical elements. It supports only spherical particles, each consisting of a single node with its mass, mass moment of inertia, and radius defined by the input. Initial coordinates and velocities are specified using the nodal data. While the SPH is a continous method developed to avoid the limitations of mesh tangling encountered in extreme deformation problems with the finite element method.

Please look at the examples: https://www.dynaexamples.com/sph and DEM: https://www.dynaexamples.com/dem

Alex