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fatigue limit Vs endurance limit

fatigue limit Vs endurance limit

fatigue limit Vs endurance limit

(OP)
Is there any difference between the fatigue limit and endurance limit???

Best regards,
ct

RE: fatigue limit Vs endurance limit

Limct;
I have seen the terms used interchangeably in reporting of fatigue test data for ferrous (steels) material, so I would have to say they mean the same thing.

RE: fatigue limit Vs endurance limit

As a follow-up, for some non-ferrous material where the S (stress amplitude)/N (cycles) graph does not flatten beyond a certain number of cycles, the endurance limit of 10^8 cycles is specifically used to define the fatigue strength for the material.

RE: fatigue limit Vs endurance limit

As a follow-on to metengr, I would add that the flattenning of the S/N cyrve is characteristic of materials which strain harden, such as carbon steel. This is due to the interstitial-dislocation interaction arresting the dislocation propagation which would otherwise lead to failure.

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