We want four layers of mesh elements to span the thickness of the crank, so the desired element edge length in the sweep direction is (0.5 /4) = 0.125 in. Click Set next to Global under Element Attributes. This ensures that the nodes around the circumference of the circle on the two parts will match up and may prevent problems in sweeping the volume elements.īring up the MeshTool again. However, we have found that for other crank geometries, when meshing using the MESH200 elements, it is a good idea to choose the two back faces of the crank arm and pedal shaft that are flush with each other (i.e. In the above, we chose the front faces of the crank arm and pedal shaft as the surface meshes for sweeping. As a veteran in these things, I can attest that ignoring warnings can come back to bite you in incovenient parts of the anatomy. In general, it is always a good idea to pay close attention to the warnings and understand their effect on your solution. Here it is a minor concern since only 1 element out of 682 is causing the warning. Pick the front face of the crank and the pedal shaft.Įlements that exceed shape warning limits can lead to degraded accuracy. Select Areas to be meshed with a Quad shape using the Free mesher. The goal is to obtain a solution that doesn't change as you refine the mesh. You should experiment with different settings for these parameters to study the effect of the mesh on your solution, as discussed in Step 9. The specified smart size of 4 and edge length of 0.12 are the result of an iterative process. Enter an element edge length of 0.12 and click OK. U nder Size Controls, click the Set button next to Global. Smartsizing will take this starting element size and modify/vary it over the geometry to account for curvature and corners. In order to have a little more control over what mesh ANSYS creates for us, we will set the starting element size for SmartSizing rather than use the default. Drag the slider to a size of 4 to get a finer mesh than the default. The edge lengths on these lines are then refined for curvature and proximity of features in the geometry." To turn on SmartSizing, check the box next to Smart Size. The SmartSizing algorithm first computes estimated element edge lengths for all lines in the areas or volumes being meshed. SmartSizing gives the mesher a better chance of creating reasonably shaped elements during automatic mesh generation. Set the TYPE to MESH200 and click OK.Īccording to the ANSYS manual, "Smart element sizing (SmartSizing) is a meshing feature that creates initial element sizes for free meshing operations.
We'll first mesh the two front surfaces using MESH200. Main Menu > Preprocessor > Meshing > MeshTool
Validate the results Step 5: Mesh geometry
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