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Aere 423 Project Composite Kneepads

Aere 423 Project Composite Kneepads. Habirah Mohd Rosli Gertude Profio Fall 08. Iowa State University. Introduction. Composite protectors used as safety gear for motorcyclist Focus on the rider knees Build and test the protector’s resistance impact. Manufacturing.

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Aere 423 Project Composite Kneepads

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  1. Aere 423 Project Composite Kneepads HabirahMohdRosli GertudeProfio Fall 08 Iowa State University

  2. Introduction • Composite protectors used as safety gear for motorcyclist • Focus on the rider knees • Build and test the protector’s resistance impact

  3. Manufacturing • Fiber orientation doesn’t matter(0o and 90o) • Impact testing • The mold based on shape and size of manufactured child kneepad • Used 6 plies of carbon fiber • Different materials to cover the mold • Release film • Wax • Release spray

  4. Manufacturing • Holes on the mold filled in by epoxy • Cured at room temperature as plastic mold might be damaged in autoclave

  5. Intended Testing • Based on national standard for cycle safety gear, the speed of impact test range between 13-23ft/s • Vertical impact • Impact for 200lb person • Adult kneepads expensive

  6. Testing • Testing was done at CNDE using impact machine • Due to equipment limitation • speed desired cannot be achieved (max 23ft/s) • 2 sets of testing • Sample attached with epoxy • Sample attached with tape • Both composite and plastic kneepad were tested

  7. Testing • We created fixtures out of wood to secure the kneepads on the machine. • We set an aluminum plate under the wood to keep the wood from being broken during the test. • Impact tester • -46.5 inch drop • -Failure test: 32.5 lb load • -Impact test: 8.4 lb load

  8. Different types of kneepad

  9. results carbon fiber, epoxy, 32.5lb

  10. Plastic, epoxy, 32.5lb

  11. Plastic, tape, 8.4lb

  12. Carbon fiber, tape, 8.4lb

  13. Plastic, no tape, 8.4lb

  14. Results Overview Note: 1 and 2 carbon fiber;tape;32lb 3 and 5 plastic; 8.4lb 4 carbon fiber; 8.4lb 5 no tape; 8.4lb

  15. Force Comparison

  16. Discussions • The used of tape doesn’t affect the impact testing results. • Deflection is low for carbon fiber kneepad. • Impact velocity is between the range of recommended testing (~15ft/s)

  17. Future WORK • Test the samples with different loads • Increase the number of plies of carbon fiber for making an adult kneepad mold and test it.

  18. Questions?

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