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Dear All When undertaking an analysis with the cap plasticity model, I get the following errors in the *msg file: ***ERROR: SYSTEM ERROR IN CAPADJ WHILE TRYING TO ADJUST THE TRANSITION SURFACE: DSCRM = -983.28 291136 4 Does anyone know what this error is caused by? I am using the...

Thanks. Having removed the comma, the analysis runs to completion. Not sure though if it is doing what I wanted!

This is my sub-routine UFIELD and relevant parts of the input file in my attempt to modify Young's Modulus with depth for a 3D block of soil. Model is 50 m in depth with vertical co-ordinate numbered from bottom up. SUBROUTINE UFIELD(FIELD,KFIELD,NSECPT,KSTEP,KINC,TIME,NODE, 1...

Hi Bartosz and Caleb I would like to vary young's modulus with depth for a 3D block of soil. I was trying to follow the recommendations on this thread but my UFIELD sub-routine is not working. Is it possible to get some help from you? Regards Aliasger

In my offshore drained clay analysis, I have been trying to vary k0 with depth in the clay to model overconsolidation. I am using the porous elasticity and modified cam clay constitutive models. However, when I run the geostatic step, even before the input file is processed, the following error...

I have a 30 m long cylinder made of 3-D shell elements. I have constructed a reference point at the centre of the cylinder at the top and kinematically constrained the surface nodes to it. I have left all degrees of freedom unchecked. Have applied a displacement boundary condition at the...

Hi Geotech 2011, I went through your input file as I would like to simulate pile driving. Is it possible for you to please explain the steps that you have used so I can understand them and apply to my model? Regards, Aliasger

I am modelling a 3D cylindrical shell embedded in solid elements around it. At the top of the cylinder at the centre, I have kinematically coupled the reference point to the shell surface and applied vertical load, horizontal load and a horizontal moment at the reference point, for transfer to...

Sorry read your earlier post about poisson's ratio.

Yes, geostatic stress is for the soil only. Do not include the pile. Gravity is for whole model so that's correct. Do you not have normal contact behaviour (hard contact and penalty constraint enforcement method)? What value of poisson's ratio are you using?

Hi Rob, I tried this but during analysis it gives an error relating to the degree of freedom of the nodes that are tied. However, when I use kinematic coupling it works. Is it ok to use kinematic coupling or does it have another function? Kind regards, Aliasger

You need to remove the pile from the geostatic stress. Just apply geostatic stress to the soil block. Also, how have you modelled your interaction. Are you using effective stress analysis?

Hi. I need to apply a moment load to the top of a hollow cylinder which is made of shell elements. I shall highly appreciate it if someone can give me some guidance on how I can apply this load in ABAQUS. Attached file shows what I need to do. Many thanks. Kind regards, Aliasger

I am modelling a geotechnical problem using a 3-D cylindrical shell (S4R) in ABAQUS. I get the section moment force (SM) output but I would like some advice on how I can obtain from SM2 the resultant bending moment with depth? Your assistance will be greatly appreciated. Kind regards, Aliasger

I have modelled, using Abaqus v6.11, a cylindrical laterally loaded pile of shell elements surrounded by a solid block of soil. Is there a way to obtain bending moments at the pile nodes using the program itself? I tried the CM output but all the values are reported to be zero. Any assistance...

Thanks!

I edited my soil set to include the soil plug and it works! Thanks for your assistance. Do you have experience in using shell elements?

I also have one material property (clay) for both soil and plug. Does this mean I do not need to define an initial stress condition for the plug even though the mesh set for my soil does not include the plug.

did u apply initial stress condition to your plug soil?

No used the same solid elements as the soil and used the same properties.