Materials Group
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Transcript of Materials Group
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.
∑FY=0
R1-F+R2=0
F=R1+R2
∑MA=0
F(l/2)-R2(L)=0
FL/2=R2L
F/2=R2
F=2R2
F=R1+R2
2R2=R1+R2
R1=2R2-R2
R1=R2
F=R1+R1
F=2R1
Formula for Reaction ForcesF
L
R1 R2
L/2 L/2
1 2
Stress Calculations for Rollercoaster Tracks
F=850lbs
L=36”
R1 R2
L/2=18” L/2=18”
1 2
F=2R1
850lbs=2R1
R1=850lbs/2=425lbs
M1=R1(L/2)/2
M1=R1L/4
M1=425lbs(36in)/4
M1= 3825in-lbs
σ=M1(L/2)/I
σ=3825 in-lbs(18 in)/28.1 in4
σ=2450.18 lbs/in2
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!)