EFFECTIVNESS OF THE FATIGUE CRITERIA FOR COMBINED BENDING – TORSION LOADING
Journal Title: Materials Engineering - Materialove inzinierstvo (MEMI) - Year 2010, Vol 17, Issue 4
Abstract
Most of mechanical components in the engineering are frequently subjected to combined loading, which can lead to sudden fatigue failure. In present work the fatigue life of plasma-nitrided and virgin specimens is studied. Specimens made of low-alloy high-strength steel. Specimens were subjected to an in-phase combined bending-torsion loading. The plasma-nitrided specimens have significantly improved fatigue resistance. The most relevant goal of this paper is to verify the efficiency of classical and advanced stress based multiaxial criteria. The criterion proposed by McDiarmid was found to be the most precise in the fatigue life prediction for virgin specimens. On the other hand, the Matake criterion was the most successful for nitrided specimens.
Authors and Affiliations
Štepán Major
Keywords
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