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!)