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Chapter_1_solutions

# Chapter_1_solutions - Chapter 1 Problems 1-1 through 1-6...

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Chapter 1 Problems 1-1 through 1-6 are for student research. No standard solutions are provided. 1-7 From Fig. 1-2, cost of grinding to 0.0005 in is 270%. Cost of turning to 0.003 in is 60%. Relative cost of grinding vs. turning = 270/60 = 4.5 times Ans. ______________________________________________________________________________ 1-8 C A = C B , 10 + 0.8 P = 60 + 0.8 P 0.005 P 2 P 2 = 50/0.005 P = 100 parts Ans. ______________________________________________________________________________ 1-9 Max. load = 1.10 P Min. area = (0.95) 2 A Min. strength = 0.85 S To offset the absolute uncertainties, the design factor, from Eq. (1-1) should be  2 1.10 1.43 . 0.85 0.95 d nA  n s ______________________________________________________________________________ 1-10 ( a ) X 1 + X 2 : 12 11 22 1 2 error . xx XeX e ex x XX ee A n s      ( b ) X 1 X 2 :   1 2 . xx Xe X e x e e A n s   ( c ) X 1 X 2 :   1 1 2 2 1 2 21 . xx X e X e e x xX X X eX e e e ee X X A n s     Chapter 1 Solutions - Rev. B, Page 1/6

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( d ) X 1 / X 2 : 11 1 1 22 2 2 1 1 1 1 2 1 2 2 1 2 1 1 12 2 1 1 1 1 1 then 1 1 1 1 Thus, . xX eX e X e X ee e X e e e 2 2 e X Xe X X X X e eA n s XXX         X ______________________________________________________________________________ 1-11 ( a ) x 1 = 7 = 2.645 751 311 1 X 1 = 2.64 (3 correct digits) x 2 = 8 = 2.828 427 124 7 X 2 = 2.82 (3 correct digits) x 1 + x 2 = 5.474 178 435 8 e 1 = x 1 X 1 = 0.005 751 311 1 e 2 = x 2 X
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Chapter_1_solutions - Chapter 1 Problems 1-1 through 1-6...

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