Drucker-Prager model

[AYCA SEN]

Hello everyone, I would like to do soil interaction modelling in ABAQUS with using Drucker-Prager model. But i dont know where should ı start. Can you help me about modelling of soil with Drucker-Prager model.

 

[FEA way]

In case of Abaqus, the single best source of information is software documentation. Start from the "Extended Drucker-Prager models" chapter. It explains all details including available options, required constants and limitations. Then check the examples featured in documentation. Finally, search for some scientific papers where this model is used in Abaqus. This way you should be able to achieve your goal.

 

[IRstuff]

https://abaqus-docs.mit.edu/2017/En...-t-prpmechanicalplasticdruckerpragermodel.htm

https://www.researchgate.net/post/How_to_run_Drucker_Prager_Cap_Model_in_Abaqus2

https://classes.engineering.wustl.e...usb/default.htm?startat=pt05ch18s03abm28.html

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[STrctPono]

Are you modeling just the soil with an applied load or is this a soil-structure analysis? If you are wondering about where to start i.e. "What parameters to use for your Drucker-Prager Model" then your fist task is to establish what kind of soil you are dealing with. Soil is not just soil. I run a lot of soil-structure interaction models and the parameters change whether our structure is located on cohesive clay, cohesionless sands, fractured coral, or intact basalt. So find out what kind of soil you have! Typically the only way to do this is to take borings at the site, extract cores, and analyze the soil. And it might not be just 1 type. Most likely there will be many layers and the soil parameters for the model will change with depth. You essentially need elastic modulus, Poisson's ratio, weight density, cohesion, friction angle, and hardening coefficient. There are different documents out there that can provide guidance on these parameters if you at least know the type of soil. As FEA way stated, check with Abaqus software documentation and how they handle inputting of the parameters.

I would definitely start with a 2D model before moving to a 3D model to make sure you have the behavior of the model and soil parameters correct.

If this is a real world project, you would be foolish to take on this liability and should absolutely hire a geotechnical engineer to provide you with these parameters.