Apply positive pressure towards a face or negative pressure outwards from a
        face.
        
        - 
                In the Project Tree, open the Analysis Workbench Workbench.
            
 
- 
                On the workbench toolbar, click the 
                    (Pressure) icon.
             
- 
                On the modeling window, click to select specific parts on the model.
                
                    Note: Pressure can only be applied to faces.
                 
             
- Optional: 
                Select the Add tangent faces check box.
            
 
- 
                In the drop-down menu, specify the Pressure units.
            
 
- 
                In the text box, enter the desired numerical value for pressure.
            
 
- 
                Click OK.