Static and cyclic strength of structural carbon and modified steels

  • Mindaugas Kazimieras LEONAVIČIUS VGTU
  • Gediminas PETRAITIS VGTU
  • Eugeniuš Stupak VGTU
  • Stanislav STUPAK VGTU
  • Jelena SELIVONEC VGTU
Keywords: steel, fatigue, fracture, threshold.

Abstract

In the article there are presented the results of experimental analytical study of the similar chemical composition but differently heat-treated structural steel: mechanical properties and resistance to cyclic loading. The indicators of strength, plasticity and cyclic failure process were determined. Fracture analysis of compact specimens (CT) was performed with SEM. It was attempted to validate the relation of mechanical properties (Rm = 500 MPa and Rm = 700 MPa) with stress intensity factor (ΔKth = 18 MPa∙√m and ΔKth = 10 MPa∙√m).

DOI: http://dx.doi.org/10.5755/j01.mech.23.6.17629

Author Biographies

Mindaugas Kazimieras LEONAVIČIUS, VGTU
Dept. of Strength of Materials and Engineering Mechanics, prof. dr.
Gediminas PETRAITIS, VGTU
Dept. of Strength of Materials and Engineering Mechanics, assoc. prof. dr.
Eugeniuš Stupak, VGTU
Dept. of Strength of Materials and Engineering Mechanics, assoc. prof. dr.
Published
2018-01-04
Section
MECHANICS OF SOLID BODIES