Hello,
I found a good resource regarding the implementation regarding periodic boundary conditions: https://nottingham-repository.worktribe.com/output/850080/an-excursion-into-representative-volume-elements-and-unit-cells
While I understand the equations , I am not sure how to implement the "relative displacement boundary conditions." in Abaqus and how to support the RVE to prevent rigid body motion.
I tried using canonical equations (and using the retained corner nodes to apply the displacments but this led to overconstraints once I got to the verticies).
Does anyone have a tip for me?
Do I have to use "control nodes" that are not part of the structure to apply the load strains/displacemnts? And which corners/face do have to be supported?
Ultimately I want to apply longitudanal shear and stress simulatinously to a Unit Cell of a fibre composite.
Regards
Michael
Hi Michael,
I hope all is well!
As an alternative, I would suggest the work
Article A complete implementation methodology for Asymptotic Homogen...
which presents a complete implementation methodology for Asymptotic Homogenization using ABAQUS.
Since the application of periodic boundary conditions are not straightforward on ABAQUS, the work describes their implementation in details for the vertices, inner edges, and inner face nodes of a 3D representative element. Additionally, it also includes the respective Python codes, which are very helpful.
I hope this can be useful for you.
Regards,
Thiago.
Hi Thiago,
thank you. It is a shame, that I did not come across your article earlier, because in the meantime I have written a python script myself. But I will take a closer look at your work, which sounds very interesting. I am suprised I did not come across it during my research.
Kind regards
Michael
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