This question is from Machine design - Shigley's Mechanical Engineering Design 9th edition SI unit - Chapter 6
Question #3 (5 Marks) A 1030 HR-steel bar has been machined to a round shaft having a shoulder with a fillet radius of 2 mm connecting a 32 mm diameter with a 36 mm diameter. It is to be placed in torsional loading for 60000 cycles to failure in an operating environment of 215 C. Using ASTM minimum properties, and a reliability of 95 %, estimate the endurance limit and fatigue at 60000 cycles.
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