y 1. Given a 10 mm diameter steel bar with S = 1200 MPa and S = 950 MPa, with a machined surface, assuming 90% reliability and operating temperature of 200 °C. a) Construct the log log S vs. log log N curve b) What is the fatigue strength corresponding to 2×10° cycles? c) Estimate the number of cycles that the part will last for if the loading is completely. alternating (o = 0) with o = 550 MPa. mean alternating d) If you want a safety factor of 2 and infinite life, what is the completely alternating stress that can be allowed?

Elements Of Electromagnetics
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y
1. Given a 10 mm diameter steel bar with S = 1200 MPa and S = 950 MPa, with a machined
surface, assuming 90% reliability and operating temperature of 200 °C.
a) Construct the log log S vs. log log N curve
b) What is the fatigue strength corresponding to 2×10° cycles?
c) Estimate the number of cycles that the part will last for if the loading is completely.
alternating (o = 0) with o
= 550 MPa.
mean
alternating
d) If you want a safety factor of 2 and infinite life, what is the completely alternating stress that
can be allowed?
Transcribed Image Text:y 1. Given a 10 mm diameter steel bar with S = 1200 MPa and S = 950 MPa, with a machined surface, assuming 90% reliability and operating temperature of 200 °C. a) Construct the log log S vs. log log N curve b) What is the fatigue strength corresponding to 2×10° cycles? c) Estimate the number of cycles that the part will last for if the loading is completely. alternating (o = 0) with o = 550 MPa. mean alternating d) If you want a safety factor of 2 and infinite life, what is the completely alternating stress that can be allowed?
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