Hi, currently I'm working on modelling the viscoplastic behaviour of solid materials by using the discrete element method. I want to use the scaling method to improve the computational time. Do you have any advice on that?
The following paper includes a review of several scaling laws for coarse-graining the particles in DEM: Article On the scaling law of JKR contact model for coarse-grained c...
Because you want to model visco-plastic behaviour, you might want to take this into account when deciding on a particular contact model and scaling method.
Hi, thank you for your advice and the article. I saw that you also deal with DEM. What is your feeling about the sensitivity of this method to model parameters?
Hello, you are welcome. I must admit that I have not yet used this scaling method and can therefore not tell you much about the sensitivity of the model parameters. Sorry not to be of more help.
Hi, wanted to let you know that I found out about a great scaling method: Article Coarse grained DEM simulation of non-spherical and poly-disp...
It seems to work for any contact model or shape, so very insensitive to the model parameters.
Hi, thank you! I see that this work concerns modelling granular materials, but I want to use DEM for solid materials. Right now I'm using mass scaling to reduce the computational time, which works. For some scaling factor values, I didn't observe any difference in results for thermal and mechanical simulations.
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