Finite Element Analysis by Pro Mechanica MAE 4980 Fall 2006 Instructor: Dr' Sherif ElGizawy

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Finite Element Analysis by Pro- MechanicaMAE
4980Fall 2006Instructor Dr. Sherif
El-Gizawy
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Steps in FEA using Pro-Mechanica

• Step 1 Draw part in Pro-Engineer
• Step 2 Start Pro-Mechanica
• Step 3 Choose the Model Type
• Step 4 Apply the constraints
• Step 5 Apply the loads
• Step 6 Assign the material
• Step 7 Set up and run the Analysis
• Step 8 View the results by post-processing

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Step 1 Creation of the part

• Use Protrusion by Sweep to create this part
  (bar.prt) as shown in Figure 1.
• Dont forget to set the working directory before
  you open the drawing

Figure 1
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Step 2 Starting Pro-Mechanica

• In Pro-Engineer window with bar.prt open, go to
  Applications? Mechanica to start Pro-Mechanica.
  This will load up Pro-Mechanica inside
  Pro-Engineer (since this is Integrated Mode
  Pro-Mechanica)

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Step 3 Choosing the model type

• You will get a window as shown in Fig 2
• Select Structure, Advanced and 3D
• and click Ok
• The part (bar.prt) will be loaded in
  Pro-Mechanica with a new set of icons for
  Structural Analysis

Figure 2
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Step 4 Applying the Constraints

• Create a new constraint by
• Insert? Displacement Constraint
• In the window, give a name
• for the constraint (fixed_face)
• and select the surface to be
• constrained and click Ok in
• surface selection window
• Specify the constraints (in our
• case will be fixed for
• all degrees of freedom)
• Click Ok
• You should be able to see
• constraints added to the part
• Check if the constraints are correct

Figure 3
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Step 5 Applying the loads

• Similar to Constraints,
• create a new load by Insert ? Force
• Give a name for the applied load (endload)
• Select the surface where the
• load will be applied
• Click ok for surface selection window
• Specify the loads (Fx500, Fy-250, Fz0)
• Preview and press Ok
• Check how forces are acting in
• part file.
• Edit the forces if the direction of forces
• are in wrong orientation

Figure 4
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Step 6 Assigning the material

• Properties ? Materials
• Add Al2014 to right side and
• assign it to the bar by selecting
• it from model tree or graphics
• window
• You can click on Edit
• if any change in material
• properties are to be made.
• Press Close

Figure 5
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Modeled part with constraints and loads
Figure 6
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Step 7 Running the Analysis

• To start a new analysis Analysis ? Mechanica
  Analysis/Studies
• Select File ? New Static in Analysis and Design
  Studies dialog box and give a name for the
  analysis.
• The constraints and loads we had created earlier
  are automatically loaded.
• In Convergence tab, select Quick Check to check
  for errors and then select Multi-pass adaptive
  for the reliable and accurate results. Change the
  order of the polynomial and percentage of
  convergence as required.
• Finally, click on Run icon (Green flag) to start
  the analysis (click on Display Study Status in
  Figure 7 to view the current status and
  completion of the analysis)

Figure 7 8
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Step 8 Viewing the results

• For post-processing, select Results from
  Pro-Mechanica window (Figure 7)
• A new window will open (Figure 9), and result
  files would be loaded automatically. If its not,
  select the folder where the analysis is saved.
• Select Fringe (contour) as Display type, Stress
  as Quantity and von-mises as the stress component
  to display
• Similarly, other quantities can be displayed in
  one window.

Figure 9
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Post-processing Results