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Russell Foundation Monorail Support System
ME 462 Capstone Design Group Members: Kelly Moore, Bart Sudhoff, Danny Compton, Katie Iaizzo, Mary Croucher Advisors: Dr. Jie Chen and Dr. Roger Knutson 12 Decmeber 2007
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Introduction Background Design Objectives Material Selection
Cost Evaluation Concept Design Product Evaluation Conclusion Recommendations Answer Questions
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Background
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Russell Foundation Founded By Bishop Michael Russell and his Father
In 2003 Faith Based Community Development Organization Renders Self-sufficiency Programs to Help Stabilize Families and Communities Provides Jobs for Local Communities Environmentally Friendly Initiatives
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Reasons For Design Reduce Traffic Congestion around Chicago-Indiana Area Provide High Speed Transportation Create Jobs in Indiana Pioneering Environmentally Friendly Mass Transit Solutions
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Preliminary Design
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Customer Requirements
Travel 75 MPH Support Renewable Energy Source Easy Assembly Easy Maintenance Smooth Rail Transition Appearance Support 160,000 lb load Minimize Stopping Time Minimize Cost Minimize Environmental Effects
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Engineering Requirements
Minimize Resistance (Rail) Maximize Allowable Stress (Structure) Equipment Hours Labor Hours Minimize Rail Height Difference Public Appearance Rating Maximize Allowable Stress (Rail) Maximize Allowable Stopping Force Minimize Cost Minimize Environmental Effects on Material
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Concept Design
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Column Support Box beam Concrete base Bolted to cross-support
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Cross Support Box beam Bolted to column Supports rails
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Standard I-Beam W27 x 368 Standard Size
Internal height equal to inches Fits standard 22 inch tire diameter
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Column Support Assembly
All parts bolted and welded
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Full Assembly
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Material Selection
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Types of Steel Two common types used: ASTM A992 and ASTM 588
More common steel types reduce cost High strength, low alloy steel, which used recycled metals Saves on cost of manufacturing Environmentally friendly
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Physical Properties ASTM A588 ASTM A992
Contains Chromium for weather resistance Made using 95% recycled material Develops oxide coating Inexpensive 50 ksi yield strength
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Cost Evaluation
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Price per cwt from Nucor-Yamato Steel Price difference per section
Structural Steel ASTM A-588 ASTM A-992 Price per cwt from Nucor-Yamato Steel $51.10 $46.60 Price per 80ft Beam $ $ Price difference per section $512.53
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Price Comparison Consider long term maintenance and repair cost
Northwestern University experiment A992 corrodes 64% more over time than A588 A992 would last less than half as long as A588 (weathering steel)
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Nuts and Bolts Quantity Description Unit Price Total Price 48
Grade 8 Plain Alloy Steel Hex Head Cap Screw 1-1/8"-7 Thread, 6" Length $7.16 Each $343.68 24 Grade 8 Plain Alloy Steel Hex Head Cap Screw 1-1/8"-7 Thread, 5" Length $6.25 Each $150.00 15 Grade 8 Plain Steel Hex Nut 1-1/8"-7 Screw Size, 1-11/16" Width, 31/32" Height, Packs of 5 $6.12 Pack $91.80 Total $585.48
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Product Evaluation
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Loading (Structure) Deadweight Load 80,000 lbs (355868 N) per Rail
Braking Force 9.8 m/s2 * 80,000 lbs Fixed Supports Base – Ground Interface Open End Rails
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Equivalent Stress (Structure)
Maximum 5.53e7 Pa
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Shear Stress (Structure)
Maximum 2.81 e7 Pa
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Total Deformation (Structure)
Maximum 16.75 mm Location Mid-span
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Factor of Safety (Structure)
Minimum 6.15 Location Beam- Near Connection
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Fatigue Analysis (Beam)
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Loading (Beam) Deadweight load 40,000 lbs per Flange Fixed Supports
Open Ends of Beam
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Total Deformation (Beam)
Maximum 9.5 mm
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Fatigue Life (Beam) Minimum 8.03e5 cycles
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Conclusion
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Concluding Remarks Our designed is based on the customer requirements and goals of the Russell Foundation. The factor of safety meets required limit of 5-7 Fatigue life exceeded 8.0 e5 cycles A588 steel resists weathering without excessive cost Single column design minimizes footprint Designed to easily integrate renewable energy sources
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Recommendations
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Structure Span Length Preliminary Testing Larger Beam
39 in. Interior Beam height Factor of Safety Increased to 9.53 Custom Beam Standard Size Not Available
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References http://www.uspto.gov/patft/index.html
Project definition packet, Russell Foundation “IndianaFreight and IndianaMonorail,” Roger Knutson; Russell Foundation; Advance Transit Solutions, LLC, May 2007 Machinist’s Handbook 12th Edition, Lang, page 397
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Questions
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