Week 5 Bending of iPhone

I-PHONE BENDING CHALLENGE

OBJECTIVES

            In this challenge, simulate the bending of iPhone as per the given cases below

Case 1: Simulate the model as it is given in the video

Case 2: Move the bottom fingers from their defined position to the given position X= 22.5mm & Z= 10mm and obtain the results for the simulation. Also define the S-N curve for the Aluminium Alloy material as per values given below and determine the fatigue life results for the same.

Stress, MPa	Number of Cycles, N
225	10000
175	100000
143	1000000
110	10000000
80	100000000

 

PROCEDURE

• First, we have to input the engineering materials with required properties or else by creating with required properties.

 

• Then we have to import our model into ansys, import the model and open it in space claim so that ansys will read it.

• Make sure except the pushing finger all the finger stiffness is rigid.

• Then assign required connections in this assignment we will use bonded contact between the frame and glass, frictional joints between the phone and the finger and translational joint for the pushing fingers.

• Then mesh the component with required mesh size in this assignment we will use
  • Mesh               – default
  • Sizing              – 4mm
  • Nodes              – 21499
  • Elements          – 8981

• Analysis setting assign fixed support for the inner body of the phone, directional load with free Y and translational displacement.

• Then give the required solution parameters then solve.

RESULTS

CASE1:

Directional deformation

Equivalent strain

Equivalent stress

CASE2: Move the bottom fingers from their defined position to the given position X= 22.5mm & Z= 10mm and obtain the results for the simulation. Also define the S-N curve for the Aluminium Alloy material as per values given below and determine the fatigue life results for the same.

Directional deformation

Equivalent strain

Equivalent stress

Life

Safety factor

CONCLUSION

	Total Deformation (mm)	Max Equivalent strain	Max Equivalent stress (MPa)	Life
Case 1	8.20	0.0088	620.09	1E+08
Case 2	7.989	0.0085	475.6	1E+08

 

From the above stimulation the life of the frame is 1e+08 and the safety factor of the frame is 15, the max stress is greater when the fingers are at the corners than middle and the strain in both the cases are found to be equal.