cm_pwr drop test structural fea. objectives simulate drop test from 3 feet using algor simulation...
TRANSCRIPT
CM_PWR Drop TestStructural FEA
ObjectivesSimulate Drop Test from 3 feet using Algor
simulation
Produce an accurate Finite Element Analysis of the event
MaterialsTest 1 - Aluminum
Simulated ForcesTest 1 & 2
Analysis
Analysis
Results Maximum Principal Stress – 1235 psi
6061- O temper AluminumMax Yield Strength ~ 8000 psi
6061- T6 AluminumMax Yield Strength ~ 35000 psi
MaterialsTest 2 - Delrin
Analysis
Analysis
Analysis
Results Maximum Principal Stress – 1370 psi
Delrin 500MP NC010Max Yield Strength ~ 10200 psi
CM_PWR Thermal Test
Structural FEA
Simulated Test ConditionsTransient Thermal Analysis
3 “Hot Spots” 0-6 min – 15 watts of Heat Generated 6-7 min – ramp up to 45 watts of Heat
Generated 7-8 min – Full 45 watts of Heat Generated
0 60 120 180 240 300 360 420 4800
10
20
30
40
50
Seconds (s)
Heat
Gen
era
ted
(W
)
Simulated Test Conditions Initial Temperature – 32º C (90º F)
Convection Coefficient – 3.2 J/(sºCm2)
Surrounding air at 32º C Density – 1.2096 kg/m3
Prandtl No. – 0.71 Thermal Conductivity – 0.0257 W/mºC
ResultsTest 1 –Aluminum Body & Base
ResultsTest 2 – DuPont Delrin Body & Aluminum Base
Alternate DesignHeat sink on the bottom of the base plate
5º C reduction at 6 minutes 12º C reduction at 8 minutes 48 in2 increase in area 0.038 lbm mass addition
ResultsTest 3 – DuPont Delrin Body & Aluminum (w/ Fins) Base