Week 5 Bending of iPhone

objective: This challenge aim to perform the static structural analysis of the iphone bending under different condition.

case1: when pushing fingers are at one of the end of the phone.

case2: when pushing fingers are at the middle of the phone.

geometry: The main component of the assembly are fingers, display, inner body and frame.

geometry consider for case1:

geometry consider for case2:

import the geometry and translate the pushing finger by x=22.5mm and z=10mm

we have made all the fingers rigid except the pushing fingers(thumb)

material:

for fingers-structural steel

for display-glass

for frame-aluminium alloy

for insider-polyethelene

properties of material are given below.

Aluminium Alloy NL

glass:

polyethelene:

structural steel:

for case2 we have to define the S-N curve for AL alloy NL in order to find out the fatique life.

contacts:

The contact between frame and display is bonded and all other contacts are frictionless. 

bonded conatct:

frictionless contact:

joints:

we have provided two Body-to ground translational joints to both pushing fingers.

we have provided fixed joints to all remaining fingers.

mesh:

we have deployed the default mesh on the component and apply the face sizing to the faces of pushing fingers only.

analysis setting:

we are going to run the simulation in 8 steps. with the following settings:

boundary condition:

fixed support: we are going to fix the insider 

displacement: we are providing the displacement to the pushing fingers.

results:

case1:

1) total deformation:

2) equivalent stress in the frame:

3) equivalent strain in the frame:

case2:

1) total deformation:

2) equivalent stress in the frame:

3) equivalent strain in the frame:

4) life of the frame 

5) safety factor:

conclusion:

The stress generated in the phone are reduced in case2 when the pushing fingers are in the middle of the phone.

In case2, the life of the frame is shown which clearly indicates that most of the area of the frame is can withstand  1e+8 cycles.

The deformation and strain in case2 also decreased.