Rok 2024

• Determination of safety indicators of the freight wagons by mobile systems

  Publikacja

  • O. Fomin
  • P. Prokopenko
  • I. Medvediev
  • L. Degtyareva

  - Procedia Structural Integrity - Rok 2024

  The organization of the movement of freight trains in Ukraine is an important factor in integrating the country’s railway transport into the European system. A situation that requires a significant renewal of the freight wagon park with modern wagons to meet the freight transportation requirements has arisen. Also, a significant drawback of railway transport in Ukraine is the limitation of the speed of trains, which include freight...

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• Fatigue behaviour of SLM maraging steel under variable-amplitude loading

  Publikacja

  • Z. Marciniak
  • R. Branco
  • W. Macek
  • C. Malça

  - Procedia Structural Integrity - Rok 2024

  One of the most challenging issues for additive manufactured materials is fatigue endurance. Engineering components often operate under complex, variable amplitude loadings, in which existing technological imperfections promote fatigue cracks growth and damage of elements eventually. In this study the effects of different variable-amplitude strain levels on fatigue life, 18Ni300 steel was tested. The work presents various behaviours...

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• On the use of uniaxial one-parameter damage laws for estimating fatigue life under multiaxial loading

  Publikacja

  • R. Branco
  • J. D. Costa
  • L. Borrego
  • Z. Marciniak
  • W. Macek
  • F. Berto

  - Procedia Structural Integrity - Rok 2024

  The goal of this paper is to evaluate the capabilities of different one-parameter fatigue laws to estimate crack initiation in notched components under multiaxial loading. Fatigue damage is accounted for through stress-based, strain-based, and energy-based approaches while the cyclic plasticity at the notch-controlled process zone is estimated using linear-elastic simulations. The results show that energy-based formulations established...

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Rok 2022

• Effect of elliptical defect orientation on the durability of specimens subjected to cyclic bending

  Publikacja

  • Z. Marciniak
  • R. Branco
  • R. F. Martins
  • D. Rozumek
  • W. Macek

  - Procedia Structural Integrity - Rok 2022

  This work presents the effect of elliptical defects orientation on the durability of specimens made of C45 steel. Three kinds of specimens with elliptical defects in the form of a one-sided notch oriented at different angles 45, 60, and 90 degrees were subjected to cyclic bending (R=-1). The stress state analysis was performed using local and non-local methods to determine an equivalent amplitude of stress, and then the results...

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