Detail publikačního výsledku

Crack Closure in the Near-threshold Region in Metallic Materials

VOJTEK, T.; POKORNÝ, P.; NÁHLÍK, L.; HERRERO, D.; HUTAŘ, P.

Originální název

Crack Closure in the Near-threshold Region in Metallic Materials

Anglický název

Crack Closure in the Near-threshold Region in Metallic Materials

Druh

Článek recenzovaný mimo WoS a Scopus

Originální abstrakt

Resistance to fatigue crack propagation is divided into the intrinsic (effective) component and the extrinsic component, represented by crack closure, which is very significant in the near-threshold regime. Crack growth rate measurements were done on the compact tension specimens made of the ferritic-pearlitic steel for automotive at the stress ratio R = 0.1 and R = 0.8. Crack closure was quantified from the experimentally measured data using the effective crack growth rate curve da/dN-ΔKeff and a new expression of the crack closure ratio Rcl = Kcl/Kmax depending on plasticity-induced crack closure, roughness-induced crack closure, oxide-induced crack closure and the exponent of the Paris power law. The presented methodology helps to analyse the crack closure mechanisms and to calibrate parameters used in the crack closure models.

Anglický abstrakt

Resistance to fatigue crack propagation is divided into the intrinsic (effective) component and the extrinsic component, represented by crack closure, which is very significant in the near-threshold regime. Crack growth rate measurements were done on the compact tension specimens made of the ferritic-pearlitic steel for automotive at the stress ratio R = 0.1 and R = 0.8. Crack closure was quantified from the experimentally measured data using the effective crack growth rate curve da/dN-ΔKeff and a new expression of the crack closure ratio Rcl = Kcl/Kmax depending on plasticity-induced crack closure, roughness-induced crack closure, oxide-induced crack closure and the exponent of the Paris power law. The presented methodology helps to analyse the crack closure mechanisms and to calibrate parameters used in the crack closure models.

Klíčová slova

crack closure; effective crack growth rate curve; plasticity-induced crack closure; steel

Klíčová slova v angličtině

crack closure; effective crack growth rate curve; plasticity-induced crack closure; steel

Autoři

VOJTEK, T.; POKORNÝ, P.; NÁHLÍK, L.; HERRERO, D.; HUTAŘ, P.

Rok RIV

2021

Vydáno

31.12.2019

Nakladatel

Elsevier

ISSN

2452-3216

Periodikum

Procedia Structural Integrity

Svazek

23

Číslo

1

Stát

Italská republika

Strany od

481

Strany do

486

Strany počet

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321620301980

BibTex

@article{BUT162447,
  author="Tomáš {Vojtek} and Pavel {Pokorný} and Luboš {Náhlík} and Diego {Herrero} and Pavel {Hutař}",
  title="Crack Closure in the Near-threshold Region in Metallic Materials",
  journal="Procedia Structural Integrity",
  year="2019",
  volume="23",
  number="1",
  pages="481--486",
  doi="10.1016/j.prostr.2020.01.132",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321620301980"
}