Application of variable equivalent amplitude for determination of fatigue life of elements subjected to block loading

• Main Authors: Obrał Justyna, Kurek Marta, Łagoda Tadeusz, Głowacka Karolina
• Format: Article
• Language: English
• Published: EDP Sciences 2021-01-01
• Series: MATEC Web of Conferences
• Online Access: https://www.matec-conferences.org/articles/matecconf/pdf/2021/07/matecconf_prmr21_01020.pdf

This paper contains a proposition of a new method of determining the fatigue life of elements subjected to non-stationary loads. The model was based on the determination of the time-variable equivalent weighted amplitude. This amplitude is derived on a continuous basis as the arithmetic mean of nth root of the amplitudes that occur up to a given time. The analysis of the proposed model was carried out on the basis of selected literature insights based on specimens made of P91 and P92 steels. The experimental tests were performed under block loading with a zero mean value in the conditions of tension-compression with a small number of cycles.