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 R1R1 R2R2 L/2 12

Stress Calculations for Rollercoaster Tracks F=850lbs L=36” R1R1 R2R2 L/2=18” 12 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= 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!)