Capstone Design Presentation April 20, 2001
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Transcript of Capstone Design Presentation April 20, 2001
Jason Harris
Capstone Design PresentationApril 20, 2001
Jason Harris
Jason Harris Ben Breazeale Greg Gonzales Jason Molina (Analysis) (Team Leader) (Web/Graphics) (Secretary)
Jason Harris
Presentation Outline• Introduction & Background• Logistics• Design • Analysis• Wrap-up
Jason Harris
• Sponsored by the Institute for Affordable Transportation (IAT)
• Performance requirements• Cost requirements• National competition in Indianapolis
May 26th
Jason Harris
Requirements• The top speed should be 25 mph• Carry a four-person load or 770 lbs• Minimum range of 120 miles• Production version should cost less than
$1200 to produce (modified design)
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• Design and build a working prototype of a BUV
• Provide a full engineering report• Provide CAD drawings and digital video
clips of the vehicle to the public• Complete a financial analysis• A web page that includes all of the
above for judging
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• Focus on the end user• Enhance the quality of life for the
operator• Components should be made from
generic steel stock so that the operator can repair it without a parts store.
• The vehicle should also be made so that other manufacturers can copy it.
• The goal of this project is to help developing countries.
Jason Molina
MilestonesDesign Review Presentation March 13Design Review Report March 13Capstone Conference April 20Web Page due May 4Design Document due May 4Graduation May 11National Design Competition May 26
Jason Molina
150 92170
50
462
0100200300400500
Hours
Number of Hours
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• W. L. Gore donated steel• Facility Services donated a vehicle
– Daihatsu• C&D Mold, Steel donated• Big thanks to Don McCallum
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1981 Daihatsu Hijet
Engine: 547 cc, 2 cylinder gasolineWheelbase: 70.75 inchesBed: 72 inchesClose match to original design
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Jason Molina
Bill of materials for prototype
ChassisSteel frame materialFrame fabrication Panel materialBrakes, SuspensionWheels and tiresDrive trainSeatsMirrors, accessoriesControlsPaint $12.00Engine Total $12.00
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Jason Molina
Greg Gonzales
Where we started
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Greg Gonzales
What we added
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Greg Gonzales
• Volume assumption of 100,000 units annually
• Based on the Daihatsu Chassis and our modification kit
• Tooling Cost approximately 2.25m• Produced in Africa (close to test
market Ghana)• Purchase Steel from Brazil (low
cost)• Cost per unit<$1200
Greg Gonzales
• Vehicle will tip fully loaded at 290
Dean’s Spot hehe ;)
Ben Breazeale
FEA model:Type: Frame undergoing a large negative acceleration (such as a collision or a fast stop); Static nodal stress.
Load: 300 lbs on roof rack
Material: 1.5 inch box steel (assumed mild steel 1020), same as the frame material. Yield strength is 294.8 MPa
Ben Breazeale
Case 1:• Frame joint• Result: Stress of 350
MPa• Factor of safety <1
Ben Breazeale
Case 2:Frame with gusset plate•Result: stress of 180 MPa•Factor of safety 1.64
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• Gusset close-up 300 lb load– Moves stress concentration away from the weld
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Ben Breazeale
Ben Breazeale
Ben Breazeale
Ben Breazeale
Ben Breazeale
The Dean’s Car…DOH!!
Ben Breazeale
• Finish Web page by May 4th
• Compete in the national design competition in May via website
• Submit design to IAT May 26
Ben Breazeale