Remeshing on Abaqus\Standard

[Imed]

Hi Friends,
I was trying for long to remesh a 2D model for metal cutting , but I could'nt. On Abaqus \Satandard.Please can anyone explain me the right procedure :
1-To extract the deformed object.
2-To remesh this deformed object ( for the moment I prefer to do this manually)
3-For relancing the calculation I am using the *MAP SOLUTION , do u have any other suggestions.

On Abaqus\Exolicit exists the *adaptive meshing , but I am using an option ( *debond) which is not available in the Explicit.So is there method to make the *adaptive meshing option available in the standard module.
Thanks for your reply.



Lot of thanks.

[Jorgen]

Hello Imed,

Here are a few answers. You can extract the deformed mesh, for example, by writing a rather simple abaqus python script that extracts the nodal coordinates and connectivities. See the scripting manual for exampels.
You can then manually remesh your object and run whatever simulation you need. Your approach to use *Map solution is fine. I have used that method many times in the past. The are currently no easy what (what I know of) to do the adoptive remeshing in ABAQUS/Standard.

Best of luck,
Jorgen

[Imed]

Hi ,
I/
Thanks a lot for your intresting reply. I found two ways to extract Data from an .odb file
1-The first way a manual one using the probe values (Tools-->Query-->Probe values) .it needs to choose nodes one by one .it seems too long especially for complex model. It generates an .rpt file
2-The second one is automatic one using a script written in the script manual it is named odbElementConnectivity.py but the problem that I couldn’t run it.
I opened an odb file ,I go to run script and located this script but there was an error message:

Error: you must supply the name of an odb on the command line
File “c:/ABAQ/odbElement Connectivity.py”,line21,in ?
sys.exit(1)
Exit code:1

I tried many ways to give the odb path file but it doesn’t accept any path I entered.Have you tried this script before(Can it contain errors) ?What is the write way to enter the odb path name?

II/
Something is foggy for reusing odb .Once I get a file containing the following data:

Part Instance Node ID Original Coordinates Deformed Coordinates
X Y Z X Y Z

PART-1-1 189 6.686 2.2 0. 6.36755 2.15563 0.

I don’t know how will I use it to remesh the deformed shape Do u have any idea, to use this information to get a new meshable geometry?I mean an object that I can mesh it using abaqus capabilities.
Sincerely.

[Jorgen]

The second option that you mention: using a script to extract information from the odb, is very powerful, and actually not that difficult (if you know the computer language Python).

I have not used the script that you mentioned, but I have written many scripts in Python for extracting and manipulating data from odb-files. If you want to learn more about this approach I suggest that you read the manual about scripting and that you try it out. Since Python is an interpreted language it is easy to debug your program. Simply start abaqus python and then type in your commands at the command prompt.

The way to remesh using this technique is to extract the coordinates and the element connectivity information and then recreate the input file from that data.

This approach works, but can be somewhat tricky :wink:

[Imed]

Hi,
Thanks for reply. For the script I am still trying, I know little about the Python language. But I'll do it.
I have an approach I 'll explain it and I want to see if it's correct:
1-I have the node deformed shape coordinates.
2-I choose only the contour coordinate nodes (one by one)
3-using the sketching module on abaqus cae I enter(manually) the contour trajectory node by node(point by point)
this step takes too much time. especially for huge number of contour's node.
4-I use ABAQUS capabilities to get a new mesh of the got geometry.
5-I generate the New nodes coordinate and new elements definition.
6-I reimplant these data in the original file
7-I restart calculation
I want to know if this is the used method or there’s other(s) one(s).
Yours sincerely.

[Jorgen]

Your approach sounds OK, exept that I think that you can make it more automatic. If I remember right, you can directly read in the deformed contours into ABAQUS/CAE and then just remesh what is inside the exterior contour. This can be further automated using a Python script.

[Imed]

Hi,
Can u give me more details how the way to make it automatically.I Think that the manual mode is boring and needs lot of care .Results are not so encouraging.
Can I get an idea about your own method to remesh using Abaqus \standard
Sincerely.

[sps_004]

Hello,
I am pursuing masters and I have chosen the orthogonal cutting
simulation as my project.
I am looking for the FEA simulation of the same operation. (The parameters I am interested in
are Chip Morphology, Cutting Forces & Residual stresses in the
component)

I am just going to use explicit first time and I am looking for some
reference doc. & input file.

Any help in this regard would be highly appreciated.

Thanks a lot.
Have a great day ahead.
Warm regards,

[Jorgen]

What material are you studying for the cutting?

[sps_004]

Numerical simulation of the orthogonal cutting using a finite strain fully coupled thermo-mechanical equations with ductile damage for 30 wt% carbon-fibre-reinforced polyetheretherketone composite (PEEK-CF30).

[Jorgen]

That certainly sounds like a challenging project!!

I would start with a general reference search for carbon fiber reinforced PEEK, I would look for both mechanical and failure data. I also assume that you will need to run a bunch of experiments on that material in order to understand its behavior and help develop a model.

- Jorgen

[sps_004]

10x u very much 4 ur help

[sps_004]

I would like to know if you have some tutorials about the orthogonal cutting for a metal for exemple
thanks in advance :o

[Jorgen]

I am afraid that I don't have a tutorial :(