materials group
DESCRIPTION
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. - PowerPoint PPT PresentationTRANSCRIPT
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!)