Team Fuzzy Balls

Waqas Abbasi

Dusty Ashberry

Daniel Grant

Chadwick Harris

Gene Karshenboym

Robert Ricaud

Presentation Overview

Finished Layout Drawings Engineering Analysis

Force Analysis Deflection Analysis Required Clamping Force Buckle Tensile Strength Tolerances and Cart Force Analysis Weight and Dimensions Material Selection Analysis

Finished Layout Drawings

New layout drawings with air compressor and latches

Engineering Analysis

Force Analysis

Total Force CalculationsAPF

214in

lbF

22 in 293in 125.17 A

222

in 4106in 29314 in

lbF

Engineering Analysis Cont.

Deflection Analysis

EI

qL

8

4

in 56.8L

in

lb75.239in 125.17

in

lb14 2

2 bPq

433

in43.112

in1in125.17

12

bhI

2in

lb 2.030,116E

Engineering Analysis Cont.

Deflection Analysis Cont.

in 97.0in 43.1

in

lb2.030,1168

in56.875.239

42

in

lb

in 28.42

in 56.8L

in 16

1in 0606.0

in 43.1in

lb2.030,1168

in28.475.239

8 42

4

in

lb

EI

qL

for deflection in the center lines of all lips, this is unacceptably high change quantity of supports from 4 supports to 8 supports

Engineering Analysis Cont.

Clamping Force

Engineering Analysis Cont.

Buckle Tensile Strength Total tensile strength must be greater than 600 lb. Assume using steel

as the buckle material with a UTS of 120000 psi.

With a safety factor of 2

, d=.08 in4120000

600 2

2

d

in

lblb

lbT

6002

Engineering Analysis Cont.

Buckle Tensile Strength Cont.

Use 1/8” diameter rods for the buckles, this will give 1473 lbs of force per side, this yields a total force of 2945 lb.N 5.

Areas of Concern Solutions-Where the buckle meets the plastic -Expand Contact Area of Buckler-Deflection of the lid. -Brace Lid

- Bowing of the sides of the container -Brace sides or choose different materials

Engineering Analysis Cont.

Tolerances Around the seal, 1/32” Elsewhere on the box, 1/8” The cart tolerances are ¼”

Cart Analysis Cart Load Analysis

F = 28 lbs F/4 = 7 lbs

Compressive force on all four legs is 7 lbs

Engineering Analysis Cont.

Weight and Dimensions

H x W x D Weight-18” x 18” x 18”, Container -18 lbs for box-6” x 6” x 18” , Compressor -10 lbs for compressor-30” x 30” x 20”, Cart -30 lbs for Cart

Engineering Analysis Cont. Material Selection Analysis

Relative Price1e-3 0.01 0.1 1 10

Re

lativ

e S

tiffn

ess

1e-5

1e-4

1e-3

0.01

0.1

Polypropylene (PP)

Polyethylene (PE)

Low alloy steel

Cast iron, grey

Lead alloys

Alumina

Polyvinylchloride (tpPVC)

Zinc alloys

CES Software of Price/Density vs. Young’s Modulus (stiffness)/ Density

Engineering Analysis Cont. Material Selection Analysis Cont.

Price (USD/lb)0.1 1 10

Te

nsi

le S

tre

ng

th (

ksi)

0.1

1

10

100

Cast iron, grey

High carbon steel

Cast iron, ductile (nodular)

CFRP, epoxy matrix (isotropic)

Titanium alloys

Medium carbon steel

Low carbon steel

Low alloy steel

Polypropylene (PP)

CES software of the Tensile Strength vs. price for the latches of the buckles

Deliverables

Next Week Part Drawings

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