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Project Rampway

Project Rampway. ME 450–Finite Element Analysis Spring 07 Aaron Emmons, Bryce Young and Eric Bush Professor Dr. K. Nema Monday – April 30 th , 2007. Presentation Summary. Eric Objective Introduction Theoretical Concepts Model Details / Material Properties / Cost Aaron Loading Cases

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Project Rampway

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  1. Project Rampway ME 450–Finite Element Analysis Spring 07 Aaron Emmons, Bryce Young and Eric Bush Professor Dr. K. Nema Monday – April 30th, 2007

  2. Presentation Summary Eric • Objective • Introduction • Theoretical Concepts • Model Details / Material Properties / Cost Aaron • Loading Cases • Results and Discussion Bryce • Finish Results and Discussion • Impact Statement • Present Conclusions

  3. Objectives • Utilize knowledge learned through Mechanical Engineering to obtain experimental results on a real-world example • Examine two different materials to optimize a motorcycle ramp for structural integrity and usability • Accomplished by structural Finite Element Analysis of both aluminum and steel ramps through Pro/E and Pro/E Mechanica

  4. Introduction Project Background / Goal • To produce the groundwork for material selection and load limits for a motorcycle loading ramp. (pickup truck) • Use Finite Element Analysis to understand performance of aluminum and steel • Compare Weight and Cost Previous Work • Finite Element Analysis of experimental objects in ME 450

  5. Theoretical Background Displacement in terms of Cartesian components: Von Mises Stress in 3 dimensions:

  6. Theoretical Background Cont. Factor of Safety: Relation between Von Mises, Yield Strength, and factor of safety:

  7. Model Details • Table 1: Ramp Dimensions

  8. Model Details II • Table 2: Material Properties

  9. Model Details III • Table 3: Steel vs. Aluminum Properties

  10. Model Details IV Mesh • Automatically generated by Pro-Mechanica at 1300 elements • Multi-pass adaptive solution

  11. Model Loading • Uniform Pressure Load, Central Localized Load and Off-centered Localized Load • Ramp is fixed for zero displacement at the base as well as the top angled flange to simulate ground and truck bed loading conditions

  12. Loading Conditions • Uniform Pressure Load – used to establish initial maximum load and force per unit area • Central Localized Load – set at approximately 60 inches (average wheel base of motorcycle) to simulate motorcycle tires • Off-Center Localized Load – real world condition of loading motorcycle up ramp under the assumption tires will not follow center of ramp

  13. Results and Discussion • Von Mises Stress and Displacement Analysis for Aluminum vs. Steel • Uniform Pressure Load • Central Localized Load • Off-center Localized Load

  14. Uniform Pressure Load Aluminum • Von Mises Stress Analysis (Load = 16000 N/m^2)

  15. Uniform Pressure Load Steel • Von Mises Stress Analysis (Load = 17500 N/m^2)

  16. Uniform Pressure Load Aluminum • Displacement (Load = 16000 N/m^2)

  17. Uniform Pressure Load Steel • Displacement (Load = 17500 N/m^2)

  18. Results of Uniform Pressure Load Aluminum Steel

  19. Central Localized Load • Von Mises Stress Analysis (Load = 4479 N) Aluminum Steel

  20. Central Localized Load • Displacement (Load = 4479 N) Aluminum Steel

  21. Results of Central Localized Load Aluminum Steel

  22. Off-Center Localized Load • Von Mises Stress Analysis (Load = 4479 N) Aluminum Steel

  23. Off-Center Localized Load • Displacement (Load = 4479 N) Aluminum Steel

  24. Off-Center Localized Load • Bending due to off-center loading

  25. Results of Off-Center Localized Load Aluminum Steel

  26. Impact Statement • This project is simulates a material selection and design validation process that a manufacturer would use in choosing a material and verifying the functional limits of a design prior to production. • An FEA analysis aids in producing a product that performs as advertised, which allows the production a safe and cost effective design that fulfills the needs of consumers. • Due to familiarity, Pro/E Mechanica was used to as the FEA software to perform the described analysis.

  27. Conclusions • The highest magnitude of stress occurred at the intersection of the angled flange • The largest displacements occurred at the center of the ramp. • Cost - Aluminum cost less than steel by more than $240 • Weight – Steel out weighs aluminum by more than 100 lbs increasing the difficulties associated with normal use and transportation

  28. Conclusions Cont. • Strength – For the same design, steel’s structural properties are superior to aluminums allowing for higher load limits and smaller displacements under the load conditions produce by a 1000lb motorcycle. • Consider weight, cost, and loaded performance, aluminum proved to be the superior material for the motorcycle ramp. • Aluminum motorcycle ramps are widely produced, indicating that manufacturers arrived at similar conclusions.

  29. References • http://www.realclassic.co.uk/ridesfiles/rides05011401.jpg • http://www.horizonsunlimited.com/newsletter/images2003/2003-04-01_Maarten-TwoWheeler.jpg • ME450 – Lecture Notes via Oncourse

  30. Questions???

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