As you can see from Fig 1, the change in mass scaling can affect the chip forming process, but none of these 3 cases can be accepted as a solution

also with a mass scaling 10E-7 and C0=4578E3 Mie-Gruneisen EOS parameter fig2 (This change is not justified a problem of unit) but the chip is generated (even in this case the model diverges).

I would be highly grateful if any one can help me to detect the problem with this model and to present a much more accurated and detailed description in node-to-surface contact algorithm considered in this work

RE: Contact problem with SPH Metal cutting in Abaqus

Is your time step really 0.001? That's huge! Remember that the time step is a function of the square of density. So if you want to increase your time step by a factor of "only" ten (that would actually be a huge increase), you need to increase your density 100x. If you look at the mass added to your simulation to achieve the time step you want I be it's enormous. Mass scaling isn't just some option that you use to adjust how quickly your simulation runs, otherwise it would be turned on by default (everyone wants their simulation to run faster). You need to be able to justify why you are able to use it without affecting your results. So the first thing I would do is to turn that off. A large time step can also cause contact problems.

Also, none of the numbers you included have any units. As an engineer you should always properly communicate the units that you're using/assuming, especially if you're asking for help about what is wrong with your analysis.

RE: Contact problem with SPH Metal cutting in Abaqus

I changed the step time and the mass scaling but no with no result
for the unit SI(mm) only the strain rate reference had to be change from 1 to 1000 but with no effect
I try to model it with a inp file change

Bowth the tool and the workpiece were modeled with Coupled temperature-displacement elements with a node-to-surface contact algorithm. I had to define a node set for the workpiece and to assign it a dammy mass.

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