Capstone Design ME 4182
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This 0 page Class Notes was uploaded by Chloe Reilly on Monday November 2, 2015. The Class Notes belongs to ME 4182 at Georgia Institute of Technology - Main Campus taught by Staff in Fall. Since its upload, it has received 13 views. For similar materials see /class/234252/me-4182-georgia-institute-of-technology-main-campus in Mechanical Engineering at Georgia Institute of Technology - Main Campus.
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Date Created: 11/02/15
Outline New Design Considerations Engineering Analysis KinematicsStability Analysis Strength of Materials and Material Selection Fatigue Analysis During Performance Finalizing the Design Zmltlt Umw 366 303 Engineering Analysis Structural Analysis ofthe Side Beams Therapst pulling at max 30 lb a wexgqts on Frame mass Lhaanklesl lb 35 lb Fy oat L F F F175 a 4 153 7 Bodymass 30 lbs 600 lb m m Fx max therapist FX max therapist 18 lb Fy oat 115 lb with safety factor of 52 T FM oat 67 lb with safety factor of 89 T Engineering Analysis Structural Analysis ofthe Front Beams 1753 Hand pulling 15 lb Ankle weight 5 lb Frame mass 35 lb Body mass 30 lb 71ft 125 4l Body mass Sh ed 30 lb Fy oat 85 lb with safety factor of 35 When body mass at center FM oat 89 lb When body mass shifted FM oat 23 lb with safety factor of 13 Materials Selection Framing Objectives Maximize strength stiffness Minimize cost density Limits Max density 175 lbinquot3 about 3x water density Max price 2lb material lt75 for machine Minimum Strength 5 ksi SF 3 when analyzed for failure in bending gtAverage durability in fresh water elastic limit Density Price Yield Ma rial elec on 1e73 Young39s modulus Density Price Material Selection Top Materials from Analysis Aluminum Alloys Magnesium Alloys Bamboo Wood Carbon Fiber RP SnthDNT Material Selection Magnesium Alloys Difficult machinabilitywelding expensive compared to aluminum Bamboo Strange material for application unwanted aesthetics cannot be welded Wood Splinters unwanted aesthetics low fracture toughness Carbon Fiber RP Difficult to make custom parts and work with Material Selection Ideal material Aluminum Alloys Easily available Bendable Weldable Inexpensive 125b High strength and stiffness Best Alloys 1100Exceent Corrosion Resistance Excellent Forming Excellent Welding 6063 Excellent Corrosion Resistance Fair Machineability drilling Good Forming Excellent Welding much more expensive Material Selection Ideal material Aluminum Alloys Could add paint or protective spray to prevent corrosion in pool environment Material Selection Also worth mentioning tpPVC Polyvinyl Chloride Polypropylene Polycarbonate Very easy to work with inexpensive and can meet strength and stiffness requirements for the design Potentia use for Prototype build o 331 Engineering Analysis Structural Analysis ofthe Top Bar 151b 151b 00873 in4 EN 10E6 psi EPvc 0 48E6 39 5 FWdOLZ 7 412 pSI maxamzvmzv 24H ESteeI 29E6 psi Smax AI 0007 In 5maxPVC 0142 in 5maxteei 0003 in Engineering Analysis Structural Analysis ofthe Bottom Bar 101b2001bmar 00873 in4 EN 10E6 psi EPVC 048E6 psi ESteei 29E6 psi Smax AI 028 in 5maxPVC 59 in ede ection 8 5maxteei 0098 in 3 5 FboayL But not including the upward forces mm 24E by the floats Fatigue Analysis Pulleys for Belts lE pmnms match your selections SVstemulMeasurement lnch P rPullEVs FurEeltTyDe FlatEeltPullevs eTYDE Panama PulleyMzterizl Nylnn Lifetime depends on how often and how it is used Cost very cheap about 2 so easily replaceable
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