Slide 1University at Buffalo
Design Goal:
Flap Analysis (basic motion simulation, stress analysis while applying different pressure forces on flap)
Drop test of complete body
NEW USP (unique selling point) generation
Battery mechanism & Location
References:
Existing Problems:
The cell phone get fall down on floor at least 2 times in day and many were complaining about body wear and tear, LCD crack
Coming out of the battery whenever cell phone drops on floor.
Flap becomes loose after some usage or fall down.
Buttons get hang
Needs wire (port connection) to transfer the data from cell phone to computer.
Idea Generation Phase:
Parameters
5(Very High)
Mold design of such design will be little bit complicated
Flap shaft mechanism will be complicated
 
 
Moderate
Idea Generation for New Unique Selling point in Cell phone
Compact Tube Light
Retractable USB Drive
Students problem of loosing USB drive will be resolved
 
 
Users do not need to carry cable for data transfer
Cons
Care while using
Decision Making Table
25
17
45
87
 
KPOV
KPIV
Parameters
Complete Assembly Exploded View
Flap Assembly Exploded View
Start
Choose the material for Engineering Analysis
Apply the material properties on the mobile assembly in the simulation mode of SolidWorks and set the model for analysis
Set the Flap angle and apply variable pressure force on the flap
Meshing
Yes
No
Take the plot reading for Von messes stress generation and strain reading and check the major area of stresses
Update the excel sheet for von messes stress obtain at particular angle and for a particular material and repeat all the iterations from the step3
Stop
for different materials at various flap angles
Flap Angles
Pressure Force(psi)
Plots Analysis: data comparison for various plastics.
Von Messes Stresses at various flap Angles at Variable Pressure Forces
Von Messes Sress at various flap angels at variable applied pressure forces
Acrylic at 0.01 pressure force 90 º Flap Angle 110 º Flap Angle 130 º Flap Angle 150 º Flap Angle 40.4 83 77.900000000000006 76.400000000000006 Nylon 6 at 0.01 pressure force 90 º Flap Angle 110 º Flap Angle 130 º Flap Angle 150 º Flap Angle 42.2 94 88 87.3 Acrylic at 0.5 pressure force 90 º Flap Angle 110 º Flap Angle 130 º Flap Angle 150 º Flap Angle 2017.9 4147.6000000000004 3895.5 3822 Nylon 6 at 0.5 pressure force 90 º Flap Angle 110 º Flap Angle 130 º Flap Angle 150 º Flap Angle 2108 4699 4421 4365
Von Messes Stress(psi)
Von Messes Stress, Strain at 150 degree Angle at Pressure Forces of 0.5 psi.
A : Motion Simulation of Flap based cell phone
B :Pressure Force Analysis
Virtual Drop Test Simulation
Virtual Drop Test Simulation
Von Messes Stresses of body casing for shell thickness 0.03inch
With ribs addition, reduction in stresses about 40 percent (from 0.5 to 0.3 MPa).
Challenges Faced During the Project
Surfacing
Solutions
Meshing : simplification of the model
Drop Test Failures : Theoretical Hypothesis developed and 1 Newton impact force applied for analysis purpose.
Questions ?