(Solution) - In the figure shown shaft A made of AISI 1020 -(2025 Original AI-Free Solution)
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In the figure shown, shaft A, made of AISI 1020 hot-rolled steel, is welded to a fixed support and is subjected to loading by equal and opposite forces F via shaft B.A theoretical stress-concentration factor Kt s of 1.6 is induced by the 1/8-in fillet. The length of shaft A from the fixed support to the connection at shaft B is 2 ft. The load F cycles from 150 to 500 lbf.
(a) For shaft A, find the factor of safety for infinite life using the modified Goodman fatigue failure criterion.
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(b) Repeat part (a) using the Gerber fatigue failurecriterion.