In the Design workspace, on the Mesh tab, select Modify > Shell . The Shell dialog displays. In the canvas, select a mesh body.

Click Design > Solid > Modify > Shell . The Shell dialog displays. Select a shell Type: Sharp Offset: Creates sharp offset corners.

For exact shelling of a closed T-Spline, convert it to a solid and use Shell in the Design workspace, Solid tab.

Selecting the face of a body shell removes that face and shells the inside.

Click OK to complete the operation and close the Shell dialog. Note: Now that you have created the shell , you can include the rest of the features in the timeline.

In the dialog, select a separation Type: Mesh Shells : Separates all mesh shells into independent bodies.

You can create a hollow solid body, or remove faces to form an opening. When you shell a body, a Shell feature appears in the Timeline.

You can create setting presets in the following tools: Extrude Rib Web Boss Snap Fit Emboss Thicken Shell Draft

Tips Assign plastic rules prior to adding parametric features like Shell or Thicken to ensure those features inherit settings and parameters from the plastic rule.

Reset Utility now removes shell extensions: The Reset Utility now properly removes shell extensions such as drag and drop handlers during the reset process, ensuring a more complete cleanup.

Tips The Parting Line Split tool works best on shelled bodies.

One of the most common errors occur when using the Shell feature. In the example below, you can see a Fillet was added after the Shell feature resulting in losing the solid edge.

Opacity: Adjust the opacity of the mesh body to investigate issues more easily. Small Shell Threshold: Specify the maximum size of small shells to repair.

Geometry Thickness = 100 mm Equation of smaller curve: (Y/2)2 + Z2 = 1 Equation of larger curve: (Y/3.25)2 + (Z/2.75)2 = 1 Study Type Static Stress Mesh Parameters Mesh Type = Solid (Tetrahedral) Element Order = Parabolic Mesh Size = 150 mm, absolute Adaptive Mesh Refinement: None Material Properties Modulus of elasticity = 210 X 103 MPa Poisson's ratio (v) = 0.3 Constraints X direction only fixed at points A, B, and C (vertices on back face of the solid model) Y direction only fixed at left (AB) face Z direction only fixed at bottom (CD) face Load Pressure = -10 Mpa Comparison of Results Tangential Edge Stress (σzz) at D (MPa) - Maximum value along 100 mm long edge of the solid element corresponding to point D of the benchmark shell element model. NAFEMS Fusion % Difference 92.7 92.83 0.14% Reference NAFEMS Publication Test No.

Geometry Thickness = 40 mm Mean Radius = 10 m (to midplane of solid hemisphere) Study Type Static Stress Mesh Parameters Mesh Type = Solid, Tetrahedral Mesh Size = 10%, Model-based Size Element Order = Parabolic Adaptive Mesh Refinement: Enabled, with slider in High position Material Properties Young's Modulus = 68.25 X 105 MPa Poisson's Ratio (v) = 0.3 Constraints Frictionless Constraints at AE and CE edge faces Fully fixed at top vertex (Point E) Loads Force 1 = 2,000 N in the X direction at Point A Force 2 = 2,000 N in the -Y direction at Point C Comparison of Results X displacement at point A (mm) NAFEMS ( Shell ) Fusion (Solid) % Difference 185 185.1 0.05 % Reference NAFEMS Publication Test No.