Need help in advanced Hex mesh

Rahul_P1

I've been studying hexa-meshing since around 6 months now. I have a problem capturing multiple fillets.. Can anyone refer to me advanced hexa-meshing tutorials?? I've tried all conventional methods to capture these fillets.. Morphing is too complicated and time-consuming.. Any ideas?? I've circled the problematic areas in the screenshots.. Mapping becomes too difficult for complicated components..  

Rahul_P1

Hi,

the component looks a bit complicated for Hexa meshing. Is there a reason why you want to use hexa elements?
have you considered tetra elements for this component (2nd order tetra elements, if accuracy of results is a concern)?

the best way which comes in my mind is split the component as mappable as possible and start meshing from smallest first. for holes you can use washers and mesh and for tiny holes you may defeature.

regarding the last component, split the fillet from the tube(s) and meshing may work. but its a little tricky. since you have to consider the mesh connectivity between the tubes and the fillet.
one more option is mesh the bottom tube with hexa elements and mesh one of the side faces with 2D elements and use mesh along the node poth and surfaces in 3D-->solid map-->general. to get proper connectivity between the elements.

Rahul_P1

ameyaforever

Please answer the questions in the previous posts, and Have you considered shrink wrap meshing?
Shrink wrap meshing is a method to create a simplified mesh of a complex model when high-precision models are not necessary, as is the case for powertrain components during crash analysis. The model's size, mass, and general shape remains, but the surface features and details are simplified, which can result in faster analysis computation. You can determine the level of detail retained by determining the mesh size to use, among other options.

Go to 2D > Shrink Wrap panel.
Here there is an option generate solid mesh – this will produce an all-hexa or all-tetra mesh based on the selected elements or geometry. The shrink wrap can thus be used as a quick mechanism to generate solid meshes.
When the generate solid mesh checkbox is active it will expose a minimum jacobian input, this option essentially will hexa mesh the part with this element quality critieria defined, it controls the hexa quality which is directly linked to the adherence to the topological features of the original component.