Publication detail

Improved description of low-cycle fatigue behaviour of 316L steel under axial, torsional and combined loading using plastic J-integral

SLÁVIK, O. VOJTEK, T. POCZKLÁN, L. TINOCO NAVARRO, H. KRUML, T. HUTAŘ, P. ŠMÍD, M.

Original Title

Improved description of low-cycle fatigue behaviour of 316L steel under axial, torsional and combined loading using plastic J-integral

Type

journal article in Web of Science

Language

English

Original Abstract

Low-cycle fatigue behaviour and fatigue crack kinetics of the 316L austenitic stainless steel were studied under cyclic axial, torsional and in-phase combined loading using hollow cylindrical (tubular) specimens with a small hole for crack initiation. The concept of plastic. J-integral was used, which was shown in previous studies to unify the crack growth rate data for several different materials. Dependencies of Jp on crack length were determined by extensive finite element modelling considering non-linear material behaviour according to the cyclic stress–strain curve. Locally deflected cracks were modelled in accordance with amplitudes of the axial and torsional components of combined loading. The measured crack growth rate diagrams for all types of loading and for various loading amplitudes were unified using amplitude of Jp. Fatigue lives under torsional loading were much longer than under axial loading for the same equivalent plastic strain amplitude, which was explained by higher crack driving forces in terms of Jp under axial loading than under torsional loading. Fatigue lives estimated by crack propagation based on a master curve in terms of Jp,a were in a good agreement with those obtained experimentally under all types of loading. The used concept can reduce the experimental program to obtaining of material data only for axial loading, which can then be used for prediction of behaviour under in-phase multiaxial loading. The von Mises formula for multiaxial low-cycle fatigue loading εeq,p2 = εp2 + γp2 / 3 was modified so that the fatigue lives under axial, torsional and combined loading were characterized in a matching way. Using the formula εp,Nf2 = εp2 + γp2 / 25, the fatigue life data fell on a single Coffin-Manson curve.

Keywords

Austenitic stainless steel Equivalent plastic strain Low-cycle fatigue Multiaxial loading Plastic J-integral

Authors

SLÁVIK, O.; VOJTEK, T.; POCZKLÁN, L.; TINOCO NAVARRO, H.; KRUML, T.; HUTAŘ, P.; ŠMÍD, M.

Released

1. 4. 2022

Publisher

Elsevier

Location

Amsterdam

ISBN

0167-8442

Periodical

Theoretical and Applied Fracture Mechanics

Number

118

State

Kingdom of the Netherlands

Pages from

100

Pages to

112

Pages count

13

URL

https://www.sciencedirect.com/science/article/pii/S0167844221003086

BibTex

@article{BUT177164,
  author="Ondrej {Slávik} and Tomáš {Vojtek} and Ladislav {Poczklán} and Hector Andres {Tinoco Navarro} and Tomáš {Kruml} and Pavel {Hutař} and Miroslav {Šmíd}",
  title="Improved description of low-cycle fatigue behaviour of 316L steel under axial, torsional and combined loading using plastic J-integral",
  journal="Theoretical and Applied Fracture Mechanics",
  year="2022",
  number="118",
  pages="100--112",
  doi="10.1016/j.tafmec.2021.103212",
  issn="0167-8442",
  url="https://www.sciencedirect.com/science/article/pii/S0167844221003086"
}