Learning Forum

[anuragk91299]

The aim of my project is to find wear on the tool for a specific parameters on a turning operation. How can that be done ?.please do let me known

[peteroznewman]

Array
Do you have access to turning machines and instrumentation to experimentally measure tool wear?

[anuragk91299]

We have access to cnc machines and in contact for a 3D Profilometer. But how can this be done on ansys
Array

[anuragk91299]

Array we're conducting experiments to compare data attained from ansys and experiments

[peteroznewman]

Array
It's best to study tool wear experimentally. You will waste a lot of time trying to make a simulation that produces a good wear prediction that correlates with experimental results. The reason is that an Explicit Dynamics model may take days to simulate just 1 minute of cutting time. Tool wear takes many hours of cutting.

[anuragk91299]

Array can the archard wear model help?

[anuragk91299]

Array

[peteroznewman]

Array
Archard wear is not appropriate for cutting. It is for sliding or rubbing.

[Costin]

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peteroznewman I face the same problem in studying the impact that asphalt has on the tool in the cutting process.

However, is there no possibility of simulating wear?

At least the beginning of the phenomenon may be.

Not unprepared to compare with the experiment. What would the procedure be like? It's a beautiful lab job that I want to do with my students.

Thank you.

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[Costin]

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[peteroznewman]

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Costin

Contact elements can compute wear using the Archard Wear equation. Note that Explicit Dynamics has nothing to do with this.

Read about Archard Wear in the ANSYS Mechanical APDL Help Manual, Contact Technology Guide, Chapter 14.1 which includes links to the Theory Manual.

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[Costin]

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peteroznewman 

Thank you very much for your promptness. I totally agree and I knew this aspect. I thought that the problem would be solved if in the explicit dynamic module I will implement Archard Wear equation through Commands (APDL). Do you think it is feasible? How else do you recommend? Thanks a lot.

obviously with the introduction of some apdl commands to restore the discretization.

In order to reduce the analysis time, I would use a flat model that can evaluate tool wear.

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[Costin]

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anuragk91299

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[peteroznewman]

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Costin

Explicit Dynamics is not an APDL solver, so APDL commands don't apply.

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[Costin]

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peteroznewman 

In order to be convincing, please consult the application MECH_TECHDEMO_043, on the ansys help page.

 we were talking about something like that.

so?

and it works very well.

so it's possible!!!

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[peteroznewman]

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Costin

Yes, in my reply to you above on January 13, I said, "Read about Archard Wear in the ANSYS Mechanical APDL Help Manual, Contact Technology Guide, Chapter 14.1 which includes links to the Theory Manual." By that I indicated that simulating wear was possible in the MAPDL solver.

This discussion is in the Explicit Dynamics category. What you don't understand is that Explicit Dynamics does not use the MAPDL solver. Explicit Dynamics uses the Autodyn solver which does not have the Archard Wear model you show above, that is a MAPDL example.

You found this link in the Structures category: /forum/discussion/comment/144081#Comment_144081

There are many links about wear using the MAPDL Archard Wear model, but none of those discussions belong in the Explicit Dynamics category. Try searching Archard Wear using this site's Search feature and you will find more discussions.

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[Costin]

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@peteroznewman 

OK thanks. another question concerns the possibility of using SPH in 2D modeling in 

explicit dynamic. As far as I know it is not possible. Only in 3D models. 

That is right?

Thanks

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[peteroznewman]

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@costin

I believe SPH is only in 3D models. I haven't personally done a SPH model yet.

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[Costin]

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Thank you ?

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