Question

Given a 1030 CR steel, estimate: a) the rotating-beam endurance limit at 10^6 cycles. b) the endurance strength of a polished rotating-beam specimen corresponding to 20,000 cycles to failure. c) the expected life of a polished rotating-beam specimen under a completely reversed stress of 75 kpsi.

Name: given a 1030 cr steel estimate a the rotating beam endurance limit at 106 cycles b the endurance strength of a polished rotating beam specimen corresponding to 20000 cycles to failure c the 55682
Uploaded: 2023-05-29T10:24:08-08:00
Duration: 3 min 12 s
Channel: Madhur L
Description: given a 1030 cr steel estimate a the rotating beam endurance limit at 106 cycles b the endurance strength of a polished rotating beam specimen corresponding to 20000 cycles to failure c the 55682

          Given a 1030 CR steel, estimate:
a) the rotating-beam endurance limit at 10^6 cycles.
b) the endurance strength of a polished rotating-beam specimen corresponding to 20,000 cycles to failure.
c) the expected life of a polished rotating-beam specimen under a completely reversed stress of 75 kpsi.

Added by Alvaro M.

University Physics with Modern Physics

Hugh D. Young 14th Edition

Instant Answer

Solved by Expert Madhur L

05/29/2023

Step 1

Let's assume that the S-N curve follows the typical shape for steels, where the endurance limit is approximately 0.5 times the ultimate tensile strength (UTS). According to the literature, the UTS of 1030 CR steel is around 100-120 ksi. Show more…

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Given a 1030 CR steel, estimate: a) the rotating-beam endurance limit at 10^6 cycles. b) the endurance strength of a polished rotating-beam specimen corresponding to 20,000 cycles to failure. c) the expected life of a polished rotating-beam specimen under a completely reversed stress of 75 kpsi.