From impact of chain rollers with the sprocket and gear teeth meshing, the momen

Question

From impact of chain rollers with the sprocket and gear teeth meshing, the moments at C fluctuate between 65 and 85 N-m for bending, and 180-220 N-m for torsion. The gear is fixed to the shaft by means of a key in a milled keyway with standard r/d = 0.02. What is the fatigue factor of safety for the SHAFT at C, using a distortional energy ASME Elliptic criterion ? Assume notch sensitivities of q = 0.50 and q_s = 0.55, a steel material yield strength of 575 MPa and a fully adjusted endurance limit of 240 MPa. 0.48 3.87 0.82 4.25 2.11.

Explanation / Answer

The answer of following question is as follows.

The fatigue factor of saftey of for the shaft C is 3.89

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