Reconsidering the Role of Fatigue Irregular Testing in Scientific Conclusions About the Fatigue Limit
DOI:
https://doi.org/10.13052/jgeu0975-1416.1014Keywords:
Mechanical fatigue, endurance limit, block loading, Linear damage summation, statistics.Abstract
We propose using the irregular loading fatigue testing to study the cru-
cial topics of the subject, for instance, concerning the fatigue limit. This
characteristic is important to know (1) for test accelerating; (2) To guar-
antee stable, reliable service. Comparative studies under block and random
loading present an opportunity to draw conclusions without the ultra-sound
frequencies loading, which are at some extend controversial. We present
an example of proposed method application. The second stage of fatigue –
namely, the crack propagation stage, is also considered (in reference). There
the main idea is similar – the irregular testing provides an opportunity to
judge about the maxim among the small amplitudes, which are not harmful.
Direct experimental estimation of true fatigue limit requires the testing under
ultra-sound frequencies, which is not under the questions nowadays
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