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3D modelling of a pile in soil
Posted: Wed Mar 29, 2023 3:31 pm
by chill
Hi I am trying to model a pile as 3D in a Drucker Prager soil (model attached), but I am having convergence issues (the model is not partitioned in the form sent, but that is not the issue, its within the analysis itself as it runs the first 2/3 stages when I partition it) and connot see what I have done wrong, would you be able to help please?
Thanks.
Re: 3D modelling of a pile in soil
Posted: Thu Apr 13, 2023 7:55 am
by STKO Team
Here's a working file:
You are using the "From Local Axes" option in contact, but you didn't assign any local axes to the interaction. Therefore, they will have their default one, with Normal = global Z (0,0,1):
- contact_N_wrong.png (50.67 KiB) Viewed 547 times
In this way, the contact is not working fine, and you experience penetration of pile into soil:
- penetration.png (121.16 KiB) Viewed 547 times
Instead you need a Cylindrical local axes, with center at the center of the pile, so that the Normal vector will be radial (from master beam to slave soil):
- contact_N_correct.png (56.91 KiB) Viewed 547 times
In this way it works fine:
- no compenetration.png (192.77 KiB) Viewed 547 times