Thank you for your reply.
General comments:
1) The problem is pipeline buckling:
2) I've decided to plot all available energy outputs when discovered that the ETOTAL is not constant and a lot much higher than the IE. I thought it would help to identify some "energy leakage" but for the moment...
Hello,
I have a question about energy history output.
Short description of the mechanical problem:
1) Static analysis;
2) Pipe31H elements;
3) Elastic-Perfectly plastic material (no UMAT, just two point *PLASTIC definition)
4) Pipeline is laying on a flat surface (+friction interaction);
5)...
Yes, thank you, I've looked the documentation already of course, and tried to run too. In this simple case results in explicit (1 second load) and implicit dynamic (1 second also) are almost the same. Implicit dynamic solver works longer (2 min against 20 seconds in explicit) and final reaction...
According to documentation only hybrid with constant pressure elements can be used with hyperelastic material (so CAX4H or CAX4RH in mya cese). It doesn't work, stable time increment decreasing dramatically.
Truly speaking I've never used implicit dynamic solver, and I can't find a lot of...
Hi,
Yes I am using a double precision and yes for the case(b) (10 seconds) number of increments is very high (about 2 millions).
I didn't use mass scaling this time. What is better in this case: increasing of a deformation rate or increasing a mass?
In CAX4RH from Standard library for problem...
Hello everyone.
I wanted to make a very simple simulation - compression of cylindrical specimen. I was very surprised, when the solution was not converging.. and it is when more complex models work quiet well.
It is a second day, but still I didn't found completely the reason of this strange...
Some elements are not great from the beginning. Adjusting leads to "zero volume element" error (more precisely: "The volume of XX elements is zero, small, or negative.")
What is the difference?
Hello everybody,
I came here to share my experience and get some view from a side: maybe someone give good idea, suggestion will see my mistakes.
So, I am simulating compression of RVE: hyperelastic matrix (cube 70x70x70 mm with holes for inclusions) filled with spherical rigid (compared to...
Hello everyone.
I have a question concerning "Mesh-to-mesh solution mapping". In the Abaqus manual it is clearly explained how to do remeshing, using "Mesh-to-mesh solution mapping". There are even two examples can be found. However, all examples are based on using of .inp files. The only thing...
Thank you for your suggestions. I have few additional questions:
to corus: why 3 node elements are bad and useless? Are they less stable in the meaning of possibility of distortion?
to IceBreakerSours: what do you mean under "high quality" element? Fine meshing?
to all:
1) I understand the...
Hello everyone!
I am doing a nonlinear simulation of a compression test of a 2D geometry with round inclusions.
Matrix is modeled as hyperelastic material, material of inclusions is chosen to be a lot stiffer then matrix. Geometry is compressed between two analytical rigid horizontal lines...
I am sorry about the links, I tried another image storage. Here are direct links on images.
Fitting curve
Boundary conditions and loading
Free bottom surface:
--- UX
--- UY
--- SX
--- SY
Fixed bottom surface:
--- UX
--- UY
--- SX
--- SY
Hi, everyone
Currently I am working with rubber, trying to get characterize its behaviour during compression and implement this information to FEM software (ANSYS in my case). So, I made a series of compression tests with[/sup] cylindrical samples and two types of boundary conditions: one...
