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Revolutionizing Bicycle Wheels: TweelTM Composite Project by Katarzyna Szemplinska

Explore the innovative Michelin TweelTM concept applied to bicycle wheels, with a focus on composite materials and performance enhancements. The project involves analyzing feasibility, manufacturing processes, and testing results to improve maintenance costs and performance. Discover the potential of combining tire and wheel into one for a better biking experience.

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Revolutionizing Bicycle Wheels: TweelTM Composite Project by Katarzyna Szemplinska

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  1. Composite TweelTMfor a Bicycle Aer E 423 Project KatarzynaSzemplinska 12/13/2008

  2. Background • Michelin’s product development • Tire and wheel combined into one – TweelTM • TweelTM objectives • Replace conventional tires • Reduce maintenance costs • Improve performance

  3. Project Description • Apply TweelTM concept to bicycle wheels • Analyze TweelTM feasibility and performance

  4. Project Design • Different spoke designs • Multiple composite materials combinations • Assumptions: • Load is split equally between the two wheels • Load is applied vertically • Initial configuration: • Outer Rim Diameter = 24 in. • Inner Rim Diameter = 4 in. • Load per Wheel = 90 lbs.

  5. Manufacturing • Spokes: Carbon fiber prepreg • 4-ply layup • Cured in an autoclave • Warping • Outer and Inner Rim: Fiberglass with Epoxy • 4-ply hand layup • Cured at room temperature • Spoke Reinforcement: Fiberglass with Epoxy • 2-ply hand layup • Cured at room temperature • Mold Structure: Styrofoam • Hand cut

  6. Final Product

  7. Testing • Compression testing • MTS testing machine • Preliminary testing: Spoke

  8. Testing • TweelTM Compression Testing

  9. Testing

  10. Results • Spoke bending was successful • Rim/spoke interface strength was not sufficient • Outer rim flexibility needs to be eliminated • Load transfer to spokes • Concept is feasible • Performance evaluation with improved design

  11. Questions?

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