1 From the COSMOS/Works menu, click Study. The Study dialog box opens.
2 Click the Add button. The Study Name dialog box opens.
3 In the New Study field, type Shell Study (or any other name) as the name of the new study.
4 From the Analysis Type drop-down list, choose Static (default).
5 From the Mesh Type box, click Shell using midsurfaces. A message window opens.
6 Read the message and click OK.
7 Click OK. The study name appears in the Studies list box.
8 Click OK. You will return to the Study dialog box.
9 Click OK.
Assign Material
To assign a material from the COSMOS/M Library:
1 Right-click the funnel icon in the Solids folder and select Apply/Edit. The Material dialog box opens with the COSMOS/M Library tab selected.
2 From the Material Type drop-down list, select Plastics.
3 From the Material Name list box, select Nylon 6/10.
4 From the Unit System drop-down list, click the desired system of units to use it in displaying the properties.
5 From the Property Type drop-down list, choose All.
6 Click OK.
COSMOS/Works Manager
Chapter 2 Static Analysis Tutorial n Lesson 5: Analysis of a Funnel (Shell Model)
Insert Loads and Restraints
A rigid cylindrical boss of a 121 mm radius is to fit in the cylindrical base of the funnel. As the inner radius of the base is 120 mm, this condition may be simulated by prescribing a 1 mm displacement in the radial direction.
To prescribe radial translation:
1 Select the inner face of the cylindrical base. The face highlights as shown.
2 Right-click the Load/Restraint folder and select Restraints. The Restraints dialog box opens.
3 In the Selected Entities list box, notice that one face is selected.
4 From the Type box, click On Cylindrical Face.
5 From the Displacement Units drop-down list select mm.
6 Click the checkbox associated with Radial Displacement. A checkmark appears.
7 Type in 1.0 in the Radial Displacement field.
8 Click OK.
Select this face
To fix the bottom face in the axial direction:
1 Change the view as shown and select the bottom face of the funnel.
2 Click the FeatureManager button at the lower left corner of the SolidWorks window to switch to the FeatureManager tree.
3 Press and hold down Ctrl and click Axis1 in the FeatureManager tree.
4 Click the COSMOS/Works Manager button to switch back to the COSMOS/Works Manager tree.
5 Right-click the Load/Restraint folder and select Restraints. The Restraints dialog box opens.
6 In the Selected Entities list box, notice that one face is selected.
7 In the Type box, verify that Use Reference plane or Axis is selected.
8 In the Selected References list box, verify that Axis1 is selected.
9 Click the checkbox of Axial Displacement and verify that 0 is entered in its field.
10Click OK. The restraint is applied so that this face may not move in the axial direction.
Select Axis1 from SolidWorks FeatureManager
Select this face
To make the top face immovable:
1 Change the view as shown and select the top face of the funnel.
2 Right-click the Load/Restraint folder and select Restraints. The Restraints dialog box opens.
3 From the Selected Entities list box, notice that one face is selected.
4 In the Type box, click Immovable (No Translation).
5 Click OK. The restraint is applied so that this face cannot move in any direction.
✍ Immovable and Fixed are different for shells. Fixed sets all translations and Rotations to zero while Immovable sets only the translations to zero.
6 Right-click the Load/Restraint folder in the COSMOS/Works Manager tree and choose Hide All to hide the restraint symbols.
Select this face
Mesh the Part
To set mesh preferences:
1 Right-click the Mesh icon and select Preferences. The Preferences dialog box opens with the Mesh tab selected.
2 In the Mesh Quality box, select High.
3 In the Mesh Control, select Smooth Surface.
4 In the Mesher Type box, select Standard.
5 From the Jacobian Check drop-down menu, select 4 Points.
6 Click OK. To mesh the part:
1 In the COSMOS/Works Manager tree, right-click the Mesh icon and select Create.
2 Accept the default element size and click OK. The Mesh Progress window opens and the program starts meshing.
3 When the mesh is completed, you will get the Shell Mesh completed message. Click OK to close the dialog box.
To show/hide the mesh:
1 In the COSMOS/Works Manager tree, right-click the Mesh icon and select Show Mesh. The mesh is displayed.
2 Right-click the Mesh icon again and select Hide Mesh to hide the mesh.
3 Right-click the Mesh icon and select Details to display information about the generated mesh.
Flip misaligned shells
Stresses on the top face of a shell element are, in general, different from those on its bottom face. Therefore, it is essential to align faces of adjacent shells properly before running the analysis. After meshing is completed, COSMOS/Works allows you to easily identify top and bottom faces of shell elements. After showing the mesh, top faces will be shown in the shaded color of the model and bottom faces will be shown in the selected Fill Color in the Mesh Preferences dialog box.
By visual inspection of the model, you will find that there is one face that has to be flipped. This face is shown in the above figure.
✍ You may get different misaligned shells based on the version or service pack of SolidWorks that you are using.
To flip misaligned shells:
1 In the graphics area, select the face shown in figure.
2 In COSMOS/Works Manager, right-click the Mesh icon and select Flip shell elements. The shell elements will be flipped.
You are now ready to run the analysis.
Flip this face
Before flipping After flipping
Run Static Analysis
To run static analysis:
1 Right-click the ShellStudy icon and select Run. Analysis starts. When the analysis is completed, you will get the Static Analysis completed message.
2 Click OK.