COSMOS meshing control and quality
COSMOS meshing control and quality
(OP)
Hi all,
Doing some testing with COSMOSworks (after toying with xPress a little) for the first time - going through tutorials and doing as much web scanning of any relevent tips I can find.
One issue I have is that on a part I can apply a mesh control to locally reduce the mesh size however if I want to locally increase the size of a mesh it just sticks to to the global mesh size (which is smaller).
The main reason I want to do this is for the majority of a particular part I want a smallish size mesh - however on the part I have modelled in a smooth chunk (to represent an undeformable chunk) that I want to apply a largish mesh on as it doesn't need to be as fine as elsewhere.
I think I could model the chunk as a seperate part and perform the FEA on the assembly of the two parts but I thought the mesh control should be able to handle this?
Also does anyone have some good techniques for mesh analysis - the only way I have found is to right click "mesh" and pick "details" where you can see aspect ratio above 10 and below 3 - is there any visual way to see the poor elements on the part?
Thanks heaps!
James
Doing some testing with COSMOSworks (after toying with xPress a little) for the first time - going through tutorials and doing as much web scanning of any relevent tips I can find.
One issue I have is that on a part I can apply a mesh control to locally reduce the mesh size however if I want to locally increase the size of a mesh it just sticks to to the global mesh size (which is smaller).
The main reason I want to do this is for the majority of a particular part I want a smallish size mesh - however on the part I have modelled in a smooth chunk (to represent an undeformable chunk) that I want to apply a largish mesh on as it doesn't need to be as fine as elsewhere.
I think I could model the chunk as a seperate part and perform the FEA on the assembly of the two parts but I thought the mesh control should be able to handle this?
Also does anyone have some good techniques for mesh analysis - the only way I have found is to right click "mesh" and pick "details" where you can see aspect ratio above 10 and below 3 - is there any visual way to see the poor elements on the part?
Thanks heaps!
James






RE: COSMOS meshing control and quality
RE: COSMOS meshing control and quality
have answered Q1 myself - using a mesh control COSMOS cannot locally enlarge a mesh to be larger the the global definition - it can ONLY refine. It can however using the h-adaptive strategy make a mesh both refined where it needs to be and coarser aswell.
Have still not found a nice way of showing graphically mesh quality. In reading Solidworks 2006 COSMOS notes they talk about "invisible meshing" - ie removing any need I presume for the user to even know what the mesh is like at all. Not such a good idea I feel - I think you should still have the option of choosing to see the mesh details if you want.
Anyhow - so far it seems not too bad so will progress with eval!
Cheers
James