Publication detail

Crack Closure in the Near-threshold Region in Metallic Materials

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

Original Title

Crack Closure in the Near-threshold Region in Metallic Materials

English Title

Crack Closure in the Near-threshold Region in Metallic Materials

Type

journal article - other

Language

en

Original Abstract

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.

English abstract

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.

Keywords

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

Released

31.12.2019

Publisher

Elsevier

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

23

Number

1

State

IT

Pages from

481

Pages to

486

Pages count

6

URL

Documents

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",
  annote="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.",
  address="Elsevier",
  chapter="162447",
  doi="10.1016/j.prostr.2020.01.132",
  institution="Elsevier",
  number="1",
  volume="23",
  year="2019",
  month="december",
  pages="481--486",
  publisher="Elsevier",
  type="journal article - other"
}