Team Wrecked Week 9 Deliverables: Engineering Analysis.
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Transcript of Team Wrecked Week 9 Deliverables: Engineering Analysis.
Team Wrecked
Week 9 Deliverables: Engineering Analysis
Energy Experiment
h = 3 ft
w = 2.5 lb
d = 25 ft
Weight was dropped from a fixed pivot point like a pendulum
Wanted to achieve a distance of 25 ft.
Experimental Results
4
5
6
7
8
9
10
11
10 15 20 25 30 35
Distance (ft)
Pot
entia
l Ene
rgy
(lbf*
ft)
Spring-loaded Arm - FBD
Shear and Bending Diagrams
Powered Arm - FBD
Shear and Bending
Governing Equations
I
My
bhI
FrT
kxF
kxmghU
spring
3
2
2
1
2
1
EES Equations
Important EES Results
• Spring constant, k = 129.7 lbf/in.
• Max spring force = 152.8 lbf
• Torque required by motor = 229.2 lbf-in.
• Max beam stress, σ = 24.7 ksi
Material Selection
Tensile Yield Strengths
σ (ksi)
Engineering Plastics ~ 2.5-17
Wrought Aluminum Alloy ~ 5-73
Aluminum Casting Alloy ~ 9-30
Copper Alloys ~ 10-60
Cast Iron ~ 47-120
Stainless Steel ~ 40-195
Carbon Steel ~ 26-118
New Design