The OpenSees Community

Hi all,

I want to use nDMaterial PM4Sand.
Although the material is in the source code and there are two examples on the website, I'm getting a warning saying "could not create nDMaterial: PM4Sand".
Any ideas?

I just want to control the displacement so I wouldn't get huge displacements resulting in convergence problems.

Hi, Suppose I have a zerolength element with Elastic Perfectly Plastic (EPP) or Steel01 (with a minuscule hardening ratio). If I load my material, after I'd reach the yielding force, I'd get huge displacements due to plasticity. Is there any possible way that I can limit these displacements? Or alte...

An update: I tested a couple of scripts and the conclusions are as follow: The zerolengthContact act as a zeroLength element with an ENT material in the direction normal to the frictional plane. If both the elements are used, they act parallel. Under the same load, the stiffness doubles and the norm...

Hi, What are the correct element recorder tags for zerolengthContact3D material? I have used 'force', 'forces', 'globalForce' and these just record bunch of zeros (while there is a force in the element, I've checked this by using a simple zeroLength element). I used 'deformation', 'stiff' and 'stiff...

How about the recorders of the element (zeroLengthContact3D )?
I cannot record the forces!

Hi All, I want to define the interface between soil and shallow foundation. Suppose the followings are my soil and foundation nodes. Both nodes have 3 DOFs. Foundation: node 1 0.0 0.0 10.0 Soil: node 2 0.0 0.0 10.0 I want to have frictional behaviour in lateral DOFs (X- and Y-direction) and elastic ...

You're right Frank. There was a problem with their compilation and they've fixed it now.

Hi, I have a large model and I'm using OpenSees on an HPC platform. My analysis script consists of two phases: static and transient analyses. Since my model is large I cannot use any system solver other than Mumps or the analysis would crash. If I use Mumps in both phases, the transient analysis doe...

I would appreciate if somebody can answer to this, is it do to Mumps?

Hi, I want to run my script on an HPC (NeSI Pan cluster). When I run my script on Pan cluster with more than 1 cpu, I confront an error saying: "Input Error: Incorrect ncuts. DomainPartitioner::partition - too few elements for model to be partitioned WARNING before analysis; partition failed - too f...

Hi,

I want to model a 3D retaining wall while having pore pressure.
Since there is retaining wall in addition to soil, all 6dofs are needed.
Considering the fact that modelling pore pressure requires an additional dof, can this model be built?
Any recommendations and guides are truly appreciated.

Hi,

I want to know if the Gauss point location is dependent and same is numbering order of quad element nodes or Gauss point 1 will always be on bottom left corner, 2 on bottom right, 3 on top right and 4 on top left?

I don't know whom I should ask this question and I have emailed code developers but got no answers so far.

Hi, I have modeled a simple medium sand soil column with PDMY material using four 1x1m quad elements which is fixed at based and constrained at 1st Dof (horizontally) at both sides. A series of loading/unloading vertical load is applied on upper surface nodes. This is like compression test (Oedomete...