Week 5 Bending of iPhone

Objective:

In this analysis study, we going to simulate bending of iPhone using hand fingers and we going to calculate fatigue life and directional deformation.

1. Analysis System: Static Structural
2. Material Properties:

• Display – Glass

• Frame – Aluminium Alloy NL

• Inside – Polyethylene

3.Mesh:

4. Contacts:

• Bonded Contact between display and frame

• Frictionless contact is given at all contact region

5. Joints

• Fixed Joint on upper fingers

• Translational Joint to Pushing Fingers

6. Analysis Setting

No of Steps: 8

Large Deformation: ON

7. Fixed Support is given as per below image on Inside to give stability to whole model while bending operation.

8. X and Z directional deformation is locked for frame.

9. Joint Load

• Translational Displacement load is given in 8 steps as 2,4,6,8,6,4,2,0.

Result Plot:

Case_1

Overall Equivalent Stress
Equivalent Stress of Frame
Y Directional Deformation of Frame
Factor of Safety
Fatigue Life

Case_2

Overall Equivalent Stress
Equivalent Stress of Frame
Y Directional Deformation of Frame
Factor of Safety
Fatigue Life

Conclusion:

Sr. No	Result Plot	Case_1	Case_2
1	Overall Equivalent Stress(Mpa)	960.61	480.33
2	Equivalent Stress of Frame(Mpa)	629.38	390.51
3	Y Directional Deformation of Frame(mm)	7.1893	5.0247
4	Factor of Safety	0.44	0.72

• it is observed that maximum equivalent stress of Aluminium Alloy Frame is in Case 1 around 629.38 Mpa.
• As well maximum Y directional deformation is also observed in Case 1 around 7.2 mm.
• Factor of safety is more in case 2 as compare to case 1.