Abstract
Comparison has been made between the results obtained from the fatigue tests with several types of fatigue testing machines under different testing conditions with the same material. As the results of it, it has been disclosed that the effect of the force of inertia caused by the interposed mass between the dynamometer and the specimen becomes large enough not to be negligible.Correction factor for this effect of the force of inertia has been calcurated from simple vibration model. The corrected S-N curves of the different types of testing become in good agreement.Calculation for this correction factor has been shown for the several types of testing machines under several conditions.
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