Need help in defining tie constraints in an Abaqus python script.

[onudxadjsharklasers.com]

I am trying to model an actuator that looks something like here (excluding the caps) which is inspired by fibre-reinforced actuator

I have also written a [python script](

https://hastebin.com/yorosixiwa.coffeescript)

to do the same but I am getting the following error :

Error in job myjooob: The following sets were not found when generating the surface "fibers-2_FiberSet 2_CNS_": FIBERS-2."FiberSet 2"
Error in job myjooob: in keyword *SURFACE, file "myjooob.inp", line 53059: Unknown part instance node set FIBERS-2."FiberSet 2"
Error in job myjooob: NODE SET ASSEMBLY_FIBERS-2_FiberSet 2 HAS NOT BEEN DEFINED
Error in job myjooob: THERE IS NO DATA ASSOCIATED WITH *SURFACE, NAME=ASSEMBLY_fibers-2_FiberSet 2_CNS_, TYPE=NODE. NODES OR NODE SETS ARE REQUIRED.
Error in job myjooob: THE SLAVE SURFACE ASSEMBLY_fibers-2_FiberSet 2_CNS_ DOES NOT EXIST.
Error in job myjooob: THE SLAVE SURFACE ASSEMBLY_fibers-2_FiberSet 2_CNS_ DOES NOT EXIST.
Error in job myjooob: THE SLAVE SURFACE ASSEMBLY_fibers-2_FiberSet 2_CNS_ DOES NOT EXIST.
Error in job myjooob: THE SLAVE SURFACE ASSEMBLY_fibers-2_FiberSet 2_CNS_ DOES NOT EXIST.
Error in job myjooob: THE SLAVE SURFACE ASSEMBLY_fibers-2_FiberSet 2_CNS_ DOES NOT EXIST.
Job myjooob: Analysis Input File Processor aborted due to errors.
Error in job myjooob: Analysis Input File Processor exited with an error.
Job myjooob aborted due to errors.

which leads me to believe that there is something wrong with my tie constraints.

These are the steps that describe my work:


1. Inner First Circle



1. Inner Second Circle



1. Extrude



1. Outer First Circle



1. Outer second Circle



1. Extrude



1. adding tube I as an instance



1. adding tube II as an instance




1. merging instances to make merged actuator



1. create point for fiber I



1. running fibers script (to make helix)



1. create point for fiber II



1. running fibers script (to make helix II)



1. Add fibers I and II to assembly



1. adding fiber I and II instance



1. DEFINE elastosil material



1. DEFINE kevlar material



1. creating elastosil sections (for tube I)



1. creating elastosil section II (for tube II)



1. creating kevlar/fiber section (for fiber I)



1. creating kevlar/fiber section II (for fiber II)



1. assigning sections for merged actuator



1. assigning sections for fibers



1. beam section orientation for fiber I and II



1. create inner surface for tube I



1. create outer surface for tube II



1. create step



1. Boundary conditions (??????)



1. Amplitude



1. Apply load



1. mesh control



1. mesh element type



1. set seed



1. mesh generation



1. mesh fibers



1. mesh settings for fibers



1. mesh



1. tie constraint for fiber I and tube I (outer surface)



1. tie constraint for tube II (outer surface) and fiber II


Any recommendations are appreciated

 

[Mustaine3]

Uncomment the final submit command, run your script in A/CAE and then "Submit" or "Datacheck" your job in the UI. This will show you a message with the problem.