Design Analysis

1
Design Analysis

• The Simple Lever Arm

2
System Representation
3
Free Body Diagrams

• Develop Differential Equations
• Neglect Mass of Lever
• Analysis of Design Variable
• Mass of Lever is needed

4
Analysis

• Optimization of Response
• Optimal force input 72 N
• Length 1.5 meters, extension of 0.5 meters
• Design Variable
• Distance R2
• Analysis
• Weight 58.79 lbs
• Max Stress 200 Mpa
• Actual Max Stress 20.4 kPa
• FS over 1400

5
Conclusions

• Cast Iron Rod
• Part 8923K38
• Price 99.17
• McMaster-Carr Supply Company
• P.O. Box 4355
  Chicago, IL 60680-4355
  [phone]
  
  Fax [phone]

6
Continued

• Error
• Mass Moment of Inertia
• Large Density Large Mass
• Large Density Large Strength
• Large Strength Well Over-Designed
• Changing the inertia changes everything.