Publication detail

Determination of fatigue crack growth in the near-threshold regime using small-scale specimens

BLASÓN, S. WERNER, T. KRUSE, J. MADIA, M. MIARKA, P. SEITL, S. BENEDETTI, M.

Original Title

Determination of fatigue crack growth in the near-threshold regime using small-scale specimens

Type

journal article in Web of Science

Language

English

Original Abstract

A complete description of the experimental procedure for characterizing the intrinsic fatigue crack propagation threshold (ΔKth,eff) as well as the fatigue crack growth rate (FCGR) in the near-threshold regime using small-scale specimens is presented. A comparative study is carried out on the high strength steel S960QL considering different single edge notch bend (SENB) specimen geometries. On one hand, the reference dimensions of 6 mm thickness (B) and 19 mm width (W) are analysed and referred to as conventional specimens. On the other hand, small-scale specimens with B = 3 mm and W = 4 and 6 mm are also considered. Several loading configurations (3-, 4- and 8-point bending) are used and a load ratio R = 0.8 is applied to avoid crack closure effects. The direct current potential drop (DCPD) technique is used to monitor the crack length. The reduced dimensions of the small-scale specimens imply the necessity of implementing a modified testing procedure compared to the recommendations of current standards for the generation of FCGR data. The results show a good agreement between tests conducted on different specimen sizes, which opens new perspectives in the use of small-scale specimens for characterizing the fatigue crack growth properties in metallic materials. Recommendations and limitations of the procedure are provided and discussed

Keywords

Alternative test procedure; Fatigue crack growth; High-strength steel; Intrinsic fatigue propagation threshold; Near-threshold regime; Small-scale specimens

Authors

BLASÓN, S.; WERNER, T.; KRUSE, J.; MADIA, M.; MIARKA, P.; SEITL, S.; BENEDETTI, M.

Released

10. 1. 2022

Publisher

Elsevier

Location

Online

ISBN

0167-8442

Periodical

Theoretical and Applied Fracture Mechanics

Year of study

118

Number

103224

State

Kingdom of the Netherlands

Pages from

1

Pages to

12

Pages count

12

URL

https://www.sciencedirect.com/science/article/pii/S0167844221003207

BibTex

@article{BUT177271,
  author="BLASÓN, S. and WERNER, T. and KRUSE, J. and MADIA, M. and MIARKA, P. and SEITL, S. and BENEDETTI, M.",
  title="Determination of fatigue crack growth in the near-threshold regime using small-scale specimens",
  journal="Theoretical and Applied Fracture Mechanics",
  year="2022",
  volume="118",
  number="103224",
  pages="1--12",
  doi="10.1016/j.tafmec.2021.103224",
  issn="0167-8442",
  url="https://www.sciencedirect.com/science/article/pii/S0167844221003207"
}