Fatigue Safety Coefficients for Ultra – High Region of Load Cycles

https://doi.org/10.26552/com.C.2020.4.97-102

  • Daniel Varecha
  • Slavomir Hrcek
  • Otakar Bokuvka
  • Frantisek Novy
  • Libor Trsko
  • Ruzica Nikolic
  • Michal Jambor
Keywords: structural steels, ultra - high cycles fatigue, safety coefficients

Abstract

In this paper the authors introduce results from the field of the fatigue safety of selected steels in the region of ultra - high number of loading cycles. The fatigue tests were carried out at high frequency tension - compression loading (f = 20 kHz, T = 20 ± 5°, R = -1) in the region from N = 106 to N = 109 cycles. The fatigue safety coefficients were calculated by four methods (Goodman, Gerber, ASME elliptic and Soderberg). The percentage reduction of the fatigue safety coefficients (N = 109 vs. N = 106 cycles) was at Goodman, 7.99 ÷ 10.83 %, Gerber, 5.27 ÷ 8.26 %, ASME, 1.89 ÷ 6.42 % and Soderberg, 6.51 ÷ 10.25 %.

Author Biographies

Daniel Varecha

Faculty of Mechanical Engineering, University of Zilina, Slovak Republic

Slavomir Hrcek

Faculty of Mechanical Engineering, University of Zilina, Slovak Republic

Otakar Bokuvka

Faculty of Mechanical Engineering, University of Zilina, Slovak Republic

Frantisek Novy

Faculty of Mechanical Engineering, University of Zilina, Slovak Republic

Libor Trsko

Research Centre, University of Zilina, Slovak Republic

Ruzica Nikolic

Research Centre, University of Zilina, Slovak Republic

Michal Jambor

Institute of Physics of Materials, Brno, Czech Republic

Published
2020-10-01
How to Cite
Daniel Varecha, Slavomir Hrcek, Otakar Bokuvka, Frantisek Novy, Libor Trsko, Ruzica Nikolic, & Michal Jambor. (2020). Fatigue Safety Coefficients for Ultra – High Region of Load Cycles. Communications - Scientific Letters of the University of Zilina, 22(4), 97-102. https://doi.org/10.26552/com.C.2020.4.97-102
Section
Mechanical Engineering in Transport