Materials Group Cait Holcomb Brian Ervin Zach Jaime
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.
Formula for Reaction Forces F L/2 1 2 L R 1 R 2 ∑FY=0 ∑MA=0 F=R 1+R 2 F=R 1+R 1 R 1 -F+R 2=0 F(l/2)-R 2(L)=0 2 R 2=R 1+R 2 F=2 R 1 F=R 1+R 2 FL/2=R 2 L R 1=2 R 2 -R 2 F/2=R 2 R 1=R 2 F=2 R 2
Stress Calculations for Rollercoaster Tracks F=850 lbs L/2=18” 1 2 L=36” R 1 F=2 R 1 850 lbs=2 R 1 R 1=850 lbs/2=425 lbs R 2 M 1=R 1(L/2)/2 σ=M 1(L/2)/I M 1=R 1 L/4 σ=3825 in-lbs(18 in)/28. 1 in 4 M 1=425 lbs(36 in)/4 σ=2450. 18 lbs/in 2 M 1= 3825 in-lbs
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!)
- Slides: 14