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How to define Drucker-Prager model for soil in Abaqus

dinhvanduc's picture

Hi everybody,

I am doing a pipe-soil interaction study using Drucker-Prager model in Abaqus software. The parameters related to soil properties are presented as below:

Soil Density: 1900 kg/m3 

Young's Modulus: 400E6 Pa

Poison's Ratio: 0.3

Drucker-Prager model:

  • Angle of Soil Friction: 45 deg
  • Flow Stress Ratio: 0.778
  • Dilation Angle: 30 deg

Drucker-Prager Hardening using hardening behavior type: Shear

  • Point 1: (Yield Stress, Abs Plastic Strain)=(100 Pa, 0).
  • Point 2: (Yield Stress, Abs Plastic Strain)=(100 Pa, 0.01).

When I used Data Check in Job module to check the input data. Abaqus gived me a message like this: "The soil have an incorrect properties definition".

My CAE model is attached as the link below:

https://drive.google.com/open?id=0B4RX6-oXBQzrM014UnByd09HdUU

Please give me the instructions to fix the model.

Thank you so much!

farzad64's picture

Why did you use Eulerian domain for the soil ? won't it prevent you to be able to define a good interaction between the soil and the pipe ? I notieced you have not defined any particular type of contact property between the components

farzad64's picture

Also to add about the error, are you sure it's not the  xxx elements have missing property definitions ?

dinhvanduc's picture

When the pipe moving on the seabed (sand), the soil will be form an configuration named "soil berm". 

Please see this link to get more information:

https://www.youtube.com/watch?v=VdQpjkwNKl4

The soil bearm is as a results in extreme large deformation. So i must use Eulerian domain to solve this problem.

Can you help me to define Drucker-Prager model for soil in Abaqus?

Thanks in advance!

 

Frank Richter's picture

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Good luck

Frank

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