Search:

Hi Dr. Jorgen and all other FEM mates,

I have an elastic model under poking. I was wondering, by output variables, field and history data, how can I evaluate which sections (a single element or a...

May be my surface is not enclosed?
Anyhow I am using axisymmetric elements by CAX8R and abaqus automatically creates FAX2 for fluid, so this shouldn't be the problem?

I get these warnings, I...

Hi Dear All and Dr. Jorgen,

I re-post my previous problem in this new thread with the input file. Hope I can have some suggestions to tackle this weird problem.
I have an axisymmetric ball, with...

Hi Daniel,

It is very clearly discussed in the manuals, for different situations. But in general,


Internal energy

"The internal energy is the sum of the recoverable elastic strain...

And I think there is no point in fixing the reference point, since it just doesnt move but the cavity moves relative to it and hence it wont be anymore in the center. In other words, even though that...

Hi All,

I am modeling a fluid filled cavity. Simply it is a ball, 2D axisymmetric, filled with water.
CAX8R and Neohookean is used for the wall. Cavity reference node defined on the axis of...

Hi All,

In what case the bulk relaxation is considerable and not be to disregarded? Is there any simple scientific explanation behind this volumetric relaxation that you mentioned for ''highly...

Hi Jorgen,

I have given it a look but couldn't find anything relevant. The E and Nu (Poisson's) are for the solid matrix. So the solid matrix and the wetting fluid could be both incompressible...

Hi Gian,

I am not an expert in this field, but I guess your question may be a bit too general. Here is a paper that I coud know about, it has used Yeoh hyperelastic model for static...

I am not sure but I think Abaqus may use relaxation characteristic time in prony series - I dont know about experimental test data- hence if you have the creep data you may need to convert it. This...

Hi Dan,

It can be any value. But beforehand one needs to make sure if the tau_i which you gonna use as input is from relaxation or is from the creep point of view. They can differ very much and...

Hi All-,

I am trying to model a sponge like material fully staurated with fluid in Abqus. Preferably with a strain hardening behaviour as in hyperelastic models.

I have heard that, it is...

Hi Dr. Bergström and All my FEM mates,

I was not sure if it was the right place for this post.

Anyway, I am trying to model a poroelastic material deformation in Abaqus under a two phase...

I guess you want to remesh your object. if so, in STANDARD,you have to do it manually in abaqus, otherwise you'll have to try your own script. for this, refer to mesh to mesh solution mapping in...

Thanks Dr Jorgen. I do appreciate all your enthusiasm and contributions in FEM and materials.