Hi Azadeh

1- an attaching file can be useful for define soil as  Mohr-Coulomb

2- i think mostly mohr-coulomb used for Perfect-Plastic(Mohr-coulomb) and Drucker-prager used for (Hardening -Plastic )

Best Regards

Alireza 

My Thesis was about interaction between Soil-Tire.

I used Drucker-prager.

What do you want to simulate exactly?

it's better you use of Eulerain-Langrangian  Coupled for soil ....

I have experimental data but if you have Tension-Strain curve for soil, you can get properties of soil in Abaqus through ABAQUS's HELP (ANALYSIS).

GOOD LUCK

Dear student: 

Use your experimental data specific to your problem and start from the basic. Download and run simple tutorial as plasticity in material property have no of options in ABAQUS modules even for rubber/hyper elasticity etc and could be confusing for new students. Run simple tutorial with prescribed data input. best of luck 

Well.. what model u wish to use depends on the available inputs you have. Provided you have inputs for both the material model, I would suggest you to go with DP model as some convergence issues are always there with MC model because of the corners.  

Hello Alireza

Thank you very much about your attached file.It was very useful.I think it's reference book.Would you please tell me about the title of book?

Best

 Hello Mr Hojjat Jafari

Thanks for your response.

My Thesis is about interaction between Soil-Structure-foundation.

I saw the manual, but it's general.I'm very thankful If you send me your experimental data.

What do you mean about this "Eulerain-Langrangian Coupled for soil"?

Many Thanks

Hi Mr Umar Farooq.

Thanks for your suggestion.

Best

Hello Tanmoy Deb

Thanks for your advice.

Would you please tell me more about "DP model" & "MC model"?What do you mean exactly?What should I do?

Sincerely

You can refer to some books dealing with such models. One is constitutive modeling in geomechanics by A.M.Puzrin and some theory along with them.