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)

Jason Harris

• 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

Jason Harris

• 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

15092

170

50

462

0100200300400500

Hours

Number of Hours

Jason Molina

• W. L. Gore donated steel• Facility Services donated a vehicle

– Daihatsu• C&D Mold, Steel donated• Big thanks to Don McCallum

Jason Molina

1981 Daihatsu Hijet

Engine: 547 cc, 2 cylinder gasolineWheelbase: 70.75 inchesBed: 72 inchesClose match to original design

Jason Molina

Jason Molina

Bill of materials for prototype

ChassisSteel frame materialFrame fabrication Panel materialBrakes, SuspensionWheels and tiresDrive trainSeatsMirrors, accessoriesControlsPaint $12.00Engine

Total $12.00

Jason Molina

Jason Molina

Greg Gonzales

Where we started

Greg Gonzales

Greg Gonzales

What we added

Greg Gonzales

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

Ben Breazeale

• Gusset close-up 300 lb load– Moves stress concentration away from the weld

Ben Breazeale

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