If this is a 3D solid then it would be coloured. As it is it looks like a shell model. Check to make sure you have made a solid. If it is a solid then it should be a swept region and coloured solid yellow, or green to show it is a structured region. I would partition each of the radii from the centre point to the tangent point, and then partition the remaining region by drawing lines from each of the centres you have just created. You should have a hexagonal region left with sharp edges. which could be partitioned into triangular regions. Extrude all the lines created to partition the solid. These should be coloured green, but a better option maybe to leave it as swept regions

Hello,

if I understand correctly, you want to split hexagon with these curved edge. If your part is solid type you can't use highlighted edge for partitioning, because it doesn't cuts entire part through its thickness.

Try to use different strategy e.g. "Define cutting plane with use of three points". Firstly choose point in the corner and project it on the curved edge on opposite side of the solid. Then you have to choose three points. Do the same on the other side and you will get your partition (attachment jpg) - now you can mesh it with structured hex.

I hope it's what you wanted to create, if not tell exactly how you want to split your part and I'll try to give same advices.

Good question… Please check references below.. hope it will be helpful for you…

Regards…

https://www.4realsim.com/pdf/Abaqus-CAE-Geometry-Import-and-Meshing.pdf

https://intranet.birmingham.ac.uk/collaboration/hpc-research/documents/public/fem/ABAQUS-CAE-Workshops-by-tyler.pdf

Try the link below:

https://www.eng-tips.com/viewthread.cfm?qid=390004