Materials Group
Cait Holcomb
Brian Ervin
Zach Jaime
Blake Presson
Our Group at Nucor
Purpose
•
Our job was to come up with the main
materials that would be required for some
of the major attractions.
•
We focused our efforts on the
Rollercoaster and the Waterslide.
Rollercoaster

Materials
•
1018 Steel supports, washer plates, nuts,
and bolts
•
Concrete footers
•
Urethane coated wheels
Why 1018 Steel?
•
This alloy is relatively affordable, and it
has good weldability.
•
The latter is especially important because
the entire frame is welded together.
•
The maximum yield for this steel is 53,700
psi.
Roller Coaster Cross

Section
Mathematical assumptions
•
For the rollercoaster, the weight of one car
will be approximately 700 pounds.
•
There will be four passengers per car
weighing a combined 1000 pounds.
•
The force (F) on one wheel is half of the
total weight.
•
The total weight equals 1700 pounds and
the force will equal 850 pounds per wheel.
∑F
Y
=0
R
1

F+R
2
=0
F=R
1
+R
2
∑M
A
=0
F(l/2)

R
2
(L)=0
FL/2=R
2
L
F/2=R
2
F=2R
2
F=R
1
+R
2
2R
2
=R
1
+R
2
R
1
=2R
2

R
2
R
1
=R
2
F=R
1
+R
1
F=2R
1
Formula for Reaction Forces
F
L
R
1
R
2
L/2
L/2
1
2
Stress Calculations for
Rollercoaster Tracks
F=850lbs
L=36”
R
1
R
2
L/2=18”
L/2=18”
1
2
F=2R
1
850lbs=2R
1
R
1
=850lbs/2=425lbs
M
1
=R
1
(L/2)/2
M
1
=R
1
L/4
M
1
=425lbs(36in)/4
M
1
= 3825in

lbs
σ
=M
1
(L/2)/I
σ
=3825 in

lbs(18 in)/28.1 in
4
σ
=2450.18 lbs/in
2
Concrete
•
We will be using a fiberglass and rebar
composite concrete for the foundations of
both the Water Slide and the
Rollercoaster.
•
Concrete is strong in compression, and
the addition of both fiberglass and rebar
improve its tensile strength.
Waterslide
–
Materials
•
Epoxy coated Fiberglass for slide
•
1018 Steel for structure
•
Concrete foundation
What's with the coating?
•
The Epoxy coating is needed to prevent
the fiberglass from splintering and harming
anyone.
•
Fiberglass is a light, sturdy material used
in water slides for its ability to be molded
to just about any shape and for its
durability.
Special Thanks to…
•
Dimos Triantafillu (T.A.)
•
Daniel Yu (Nucor)
Questions?
(come on, I know you didn’t understand a
single word of that!)
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