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A new window Mechanical Modeler will open. We will start with the default mesh generation method. Under Outline, right click on Mesh and  click Generate Mesh. This will give us mesh that ANSYS mesher thinks appropriate for our geometry. We see that ANSYS is smart enough to create a mesh that sweep across the cross sectional area of the crank. This is the type of mesh is what we are seeking for our geometry. However, sizing wise, the mesh is too coursecoarse. We will have to increase the number of elements.

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You should have 18205 nodes and 3582 elements for your mesh. Click on Statistics under Details of "Mesh" to see that.

For future reference,  the default mesh might not produce the desirable mesh that we want. To specify our own mesh control, right click on Mesh and select Insert. This way, we can insert meshing type and control that we desire. To learn more about different meshing methods, please refer to the Mechanical Help at the top menu.