In this video, learn about the different meshing controls in SOLIDWORKS Simulation.
- [Lecturer] We've seen that creating a mesh in a CAD model is a compromise between a number of elements, the element quality, and putting a fine enough mesh in regions of high stress gradient. SOLIDWORKS has a range of tools to allow finer control over the meshing process. We're first going to look at the curvature based mesh control. Now we're going to save this model straight away. So File Save As. We're going to call this baseline 10.
Again it's asking us if we want to copy the result files. The only result files we have are the mesh representation of the quality, the jacobian and the aspect ratios, so they're being called result files by SOLIDWORKS. So we want to keep hold of those for the moment. Now the reason for saving the database now is that the mesher can be unstable and occasionally it can hang the database. If this occurs in your work then abandon this version and revert back to baseline nine. Curvature base meshing recognizes only curvature on surfaces and edges, and increases the mesh locally in these regions.
Right mouse click on the mesh icon again and say, create mesh. Now click the mesh parameters option, they're open here and check the radio button for curvature based messing. The global size is still set roughly to out value of point four. We can see if we hover over the icon here, called the maximum element size. Come down here we can see, this is the minimum element size, and what we want to do is to use the spin wheel to come down to the smallest possible value, which is around about .0134.
If we go to the next control, if we hover over it. It's the minimum number of elements in a circle, so any kind of arc or circle that we have, saying how many elements can we have around that feature. At the moment the default is set to eight. We want to push that all the way up. So use the spin wheel, go up to the maximum which is 36. So wherever it sees curvature or an arc it's going to try and put a minimum of 36 elements around that feature. We're going to leave the growth ratio default at 1.5.
So check okay. Let's select the little end view. Looking at the little end we can see that the curvature based meshing has been applied to the inside of the base here and also to the outside face here. It's also picked up the curvature in these machine pocket regions around here. Let's go back to the standard view. We can see the same thing has happened at the big end, around these pocket regions here where there is curvature, you've got saturated mesh, again we have more elements on the outer surface and the inside surface.
Let's go to the little end. Now the curvature on the inside and the outside faces the little end, is given a different mesh density on each. That's actually making mesh transition quite awkward through the thickness. We also know that increasing the mesh density of the vertex of the fillet radius is not a good idea in this particular case, we're going to get collapsed elements. Because there's curvature here the curvature based meshing will tend to give us smaller elements in this region in here.
Also curvature based meshing hasn't been very useful in this case, it can be a very powerful tool. I wanted to demonstrate its usage. It's always worth trying curvature based meshing to see if it can improve the mesh. So in conclusion, curvature based meshing is very powerful, but it will affect all curved surfaces. Sometimes if we're interested in a feature down say the little end, we do pick up curvature based meshing at the big end, and at the pockets as well. There's no particular distinction on which curvature it's going to be using.
But as I said before, it's always worth trying to see if it will produce an efficient mesh, again very quickly.
- Setting up Simulation properties and defined views
- Preparing the geometry
- Setting up a local coordinate system
- Splitting surfaces
- Defining the constraint and the loads
- Running analysis
- Contour control
- XY plots