Soil-Tool interaction

[Poita]

Ripper.inp

Hi all,

I am trying to get my head around Granoo but get a bit stuck on the topic of bonds between elements. I am looking to simulate interaction between soil particles and a tool. The attached .inp file works in so far that the tool interacts with the particles, but the particles fly off in all directions. I have made up the domain with the cooker utility. It looks like the particles are paired, but the bond definition is either lacking or not correctly defined ?

The Granoo documentation is a bit sparse, if someone could point me in the right direction then that would be greatly appreciated !

Cheers, Peter