What failure percentage would be expected

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Reference no: EM131376839

Assume that the failure rate calculated in Problem 6.41 is unacceptable.

(a) To what value would the standard deviation of shaft strength have to be reduced in order to give a failure rate of only 3%, with no other changes?

(b) To what value would the nominal shaft strength have to be increased in order to give a failure rate of only 3%, with no other changes?

Problem 6.41

A shaft is subjected to a maximum load of 10 kN. It is designed to withstand a load of 15 kN. If the maximum load encountered is normally distributed with a standard deviation of 2.5 kN, and if shaft strength is normally distributed with a standard deviation of 2.0 kN, what failure percentage would be expected?

Reference no: EM131376839

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