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Unformatted text preview: 2 (661.67 kg·m/s 2 )/(9.81 m/s 2 ) = 67.4 kg = 148.6 lbs. So, if you weigh 148.6 lbs. or less, according to LEFM, you could win $10 Million! Question 3 A fatigue test is made with a mean stress of 15,000 psi and a stress amplitude of 20,000 psi. Calculate the maximum and minimum stresses. ) ( 5 ); ( 35 40 20 2 30 15 2 min max min max min max min max min max n compressio ksi tension ksi ksi ksi ksi ksi amplitude mean= = === = + = + = σ Question 4 From the SN curve: Cycles σ ampl N f 100,000 40ksi infinite 20,000 60ksi 10 6 let y = number of years; set Miner’s Law equal to 1 at failure ( 1 ) 020 . 10 000 , 20 000 , 100 6 = + = + ∞ = ∑ y y N n i y = 50 years to failure under the given loading conditions....
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This note was uploaded on 06/29/2009 for the course CEE 3020 taught by Professor Moser during the Spring '09 term at Georgia Tech.
 Spring '09
 MOSER

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