Requirements for Creating Valid Thin Solid Regions
To define a thin solid AutoGEM control, the selected surfaces in the model must meet certain criteria:
• When you select the Split Surfaces check box, the following criteria must be satisfied:
◦ The selected top and bottom surfaces must be of the same type. That is both must be either curved or planar surfaces.
In the following figure, the top surface is planar and the bottom surface is curved. Hence you cannot create a thin solid mesh control for this model.
1. Planar top surface
2. Curved bottom surface
◦ For planar surfaces, the angle between the top and bottom surfaces must not exceed 30 degrees. In such cases, you can select almost parallel top and bottom surfaces.
◦ For a thin solid control all the surfaces selected as the top surface must have the same parent surface. Similarly all surfaces selected as the bottom surface must have the same parent surface. This ensures that you do not create multi-constant thickness pairs.
◦ The selected surfaces must be solid faces of the same part.
• When you clear the Split Surfaces check box, the following criteria must be satisfied:
◦ The selected surfaces must be solid faces of the same part.
◦ AutoGEM must create compatible surface mesh for the two selected surfaces without splitting them.
◦ The numberof holes or contours on each surface of the thin solid pair must be the same.
• You cannot create thin solid regions for models with geometry on side surfaces.
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