question archive A solid round bar, 25 mm in diameter, has a groove 2
A solid round bar, 25 mm in diameter, has a groove 2
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A solid round bar, 25 mm in diameter, has a groove 2.5 mm deep with a 2.5 mm radius machined into it. The bar is made of AISI 1018 CD steel and is subjected to a purely reversing torque of 165 N middot m. For the S-N curve of this material, let f = 0.9.
a) Estimate the number of cycles to failure.
b) If the bar is also placed in an environment with a temperature of 450 degree C, estimate the number of cycles to failure.
Number of cycles to failure =
Number of cycles to failure at 450 degree C =
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