Mesh Error with model with small holes

[rluuv]

Hi all. I will precursor this by saying I am rather new to FEA and self taught for my research projects.

This is probably a dumb question but I am having troubles meshing one of my asymmetrical models on ABAQUS. I've attached a photo for reference. I've tried both changing the seed sizes and partitioning but I keep receiving the error that it won't mesh.

For partitioning, I have tried cutting the holes in half as the model is symmetrical along the z direction and also partitioning the model along the y direction. Still no luck -- when I try to mesh it I get a ton of poor or failed elements warnings and/or by changing seed size some sizes won't even attempt to mesh. Nonetheless, when I try to run the job (simple compression) the job fails unsurprisingly.

Any suggestions would be much appreciated! Thank you all in advance!

 

[FEA way]

Add partitions in the XY plane too and try with different meshing technique/algorithm. Or, if you don’t need to use hexa mesh, switch the shape of elements to tetra.