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Mechanical Engineering Analysis. Material Selection Process. Engineering Assumptions. Aluminum 1100 O ν = .33 E=10.1 Msi T=.09 P= 7.5 lb Yield Strength= 20ksi Loading case 1: 2- 1” hinges applied 2in from each end Loading case 2: 1 3/8” wide welded rail holding a total of 1.94 lbs.
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Engineering Assumptions • Aluminum 1100 O • ν= .33 • E=10.1 Msi • T=.09 • P= 7.5 lb • Yield Strength= 20ksi Loading case 1: 2- 1” hinges applied 2in from each end Loading case 2: 1 3/8” wide welded rail holding a total of 1.94 lbs
Engineering Analysis • Leg analysis • Maximum stress: 455.9psi • Maximum deflection: .00185in in z-direction • Rail analysis • Maximum stress: 30.632psi • Maximum deflection: .322X10-5in
Engineering conclusions • The stresses and deflections incurred for both the leg and rail are well below the maximum allowed tolerances for the individual parts. • This indicates that the thicknesses assigned and the materials selected fit well with our design. And confirms that the mechanical design is sound.