Importing an Orphan Mesh with a Stress Field
Importing an Orphan Mesh with a Stress Field
(OP)
Hello All,
I have a successful simulation with a structure which has undergone a stretch. I would like to import that part into a new model with the stress and strain still incorporated into the part, but in a new model. I am able to import the orphan mesh, but I am trying to apply a "Predefined Field" to it. I have the nodal output of stress for each node in the part. However, I do not know how to apply these nodal outputs to the orphan mesh that I have created. Is there a way to import an orphan mesh with the stress incorporated in it? Am I on the right track? Thanks a bunch!
Thanks
I have a successful simulation with a structure which has undergone a stretch. I would like to import that part into a new model with the stress and strain still incorporated into the part, but in a new model. I am able to import the orphan mesh, but I am trying to apply a "Predefined Field" to it. I have the nodal output of stress for each node in the part. However, I do not know how to apply these nodal outputs to the orphan mesh that I have created. Is there a way to import an orphan mesh with the stress incorporated in it? Am I on the right track? Thanks a bunch!
Thanks





RE: Importing an Orphan Mesh with a Stress Field
RE: Importing an Orphan Mesh with a Stress Field
I understand what you are saying. I am running into a problem when I type the Job Name of the previous analysis job, it says it cannot find the .res file. I am wondering what this means. I have tried to find a .red file in my working directory, as well as my temp folder, and have nothing. Any help would be greatly appreciated.
Thanks,
-Alex
RE: Importing an Orphan Mesh with a Stress Field
RE: Importing an Orphan Mesh with a Stress Field
Thanks
RE: Importing an Orphan Mesh with a Stress Field
So the reason I am trying to do this procedure is because I am running an extension test, which is to be followed by a rotation. Imagine a cylinder that is stretched to a solid body. then, that solid body rotates. But when the solid body rotates, the cylinder needs to rotate with the solid body. I am trying to extend the cylinder structure to the solid body. Then have it mate at that time. THEN, i want to rotate the solid structure. But I cannot find out a way to apply a step specific tie constraint, or a couple constraint. This is why I am trying to run the extension test, then export the mesh with the stress, and then run the rotation step. If you have any input on how I should model this or other ways rather than trying to model this extension, then rotation, I would really appreciate it.
Thanks,
-Alex
RE: Importing an Orphan Mesh with a Stress Field
The easiest approach to this is through CAE, hopefully you have access to it! The approach I use is to import the INP file from the original analysis, then assign predefined fields to each part in the assembly using the initial state option. After this you can implement the new tie constraints, even if the surfaces are not in contact in the original configuration.
There are probably other ways to approach this but I think using an import analysis is a fairly streight-forward way to do it.
RE: Importing an Orphan Mesh with a Stress Field
Thanks for responding, I really appreciate the feedback. I am still running into the same problems with your method. However, I am able to import the deformed mesh into my new assembly. But I have the following problems.
1) I tried importing the INP file as you had said...But this does not provide the deformed geometry that I need...Why would I import the INP file from the initial simulation? is there something important from this file that I need to use?
2) The predefined field option is still giving me the .RES file error. I went into the step menu as you had suggested, and do not understand how to tell abaqus to create this file.
any help would be greatly appreciated.
this seems like such a basic thing...I really cannot believe I am having trouble with this. But again, thanks for all the help!!!!
Thanks,
-Alex
RE: Importing an Orphan Mesh with a Stress Field
For point 2. You tell abaqus to generate restart data in the step module by going to Output>Restart Requests and changing the number of intervals to the number of times restart data will be requested in the analysis.
Hopefully this helps...
RE: Importing an Orphan Mesh with a Stress Field
I cannot thank you enough. You have been a great Help. So i have successfully imported the predefined field. However, I am now receiving errors based on my surface ties. It doesnt like the surface tie selections I have given it...this seems odd. I was wondering if you have any input on this, or if there are special ways to define the surface interactions with an imported orphan mesh.
Thanks,
-Alex
RE: Importing an Orphan Mesh with a Stress Field
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This option is not supported for element loop parallelization. If you have specified element loop parallelization, it will be turned off for this analysis.
Material/behavior placl has been redefined in the current analysis. Care must be taken to ensure that a consistent state can be maintained during the import procedure.
For *tie pair (assembly__pickedsurf98-assembly_femur-1_acl_insert), not all the nodes that have been adjusted were printed. Specify *preprint,model=yes for complete printout.
For *tie pair (assembly__pickedsurf98-assembly_femur-1_acl_insert), adjusted nodes with very small adjustments were not printed. Specify *preprint,model=yes for complete printout.
The system matrix has 23196 negative eigenvalues.
Excessive distortion at a total of 19291 integration points in solid (continuum) elements
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the negative eigen values stay the same for a few iterations, and the excessive distortion reduces for each iteration. However, the final error is that too many increments are made for this increment. so I am unsure why this is happening.
Thanks,
-Alex
RE: Importing an Orphan Mesh with a Stress Field
Did the analysis produce any output? If you can see the analysis results then maybe you'll get an idea of which elements are most distorted?