Week 5 Bending of iPhone

#5 Week Assignment- Structural Analysis using Ansys Workbench

Objective:

• Setup and execute the cases with the prescribed materials and the other criteria.
• Simulate the setup and evaluate the results for the different parameters.
• Observe the differences and prepare a detailed report.

Case setup and Execution:

• Goto Engineering Data and create a material following values and name it as glass and click on add to library.

• Now goto geometry and view the model for any corrections.

• Now import the model into the Mechanical module and rename the components manually in the geometry based on the definition.

• Goto Contacts and rename the existed contacts based on their definition and change the types as frictionless except for the Contact which is display to frame.

• Create a face sizing under the mesh and select the faces(under the fingers,back-panel).

• Click on generate the mesh and the mesh will be same as below.

• Create the displacement under the static structural and select the faces on the body panel as selected below either of the sides.

• Set the co-ordinates as shown below.

For the Analysis settings:

No. of steps=8

Large Deflection= On

Solver type= Direct

Auto Time-stepping= Program Controlled

Directional Deformation (Y-Axis):

Equivalent Stress:

Equivalent Strain:

CASE-2:

• Now duplicate the static structural window and save the first case.
• Rename the duplicate as case-2.
• Goto spaceclaim geometry use the move option.
• Now the position of the pushing fingers is changed in the spaceclaim geometry to the given position X=22.5mm, Z=10mm.

• Goto Engineering Data and select the Aluminium Alloy.
• Create the S-N curve as follow for the Aluminium alloy.

Now without changing the previous set-up run the simulation.

Directional Deformation (Y-Axis):

Equivalent Stress:

Equivalent Strain:

Factor of Aluminium Alloy NL:

Life of Aluminium Alloy:

Comparison:

	Directional Deformation (Y)(mm)	Eq. Stress(MPa)	Eq.Strain
Case-1	Max:5.49	Max:836.64	Max: 0.1213
Case-2	Max: 4.39	Max:775.42	Max:0.0923

Conclusion: From the above simulation we can conclude that case-2 can make the model survive comparing to the case-1 as the stress and strain developed were comparitively low.