Publication detail

Numerical evaluation of plasticity induced crack closure in 3D structures

OPLT, T. HUTAŘ, P. POKORNÝ, P. NÁHLÍK, L. BERTO, F.

Original Title

Numerical evaluation of plasticity induced crack closure in 3D structures

Type

journal article in Scopus

Language

English

Original Abstract

Fatigue growth of the crack may be retarded as a consequence of the fatigue crack closure occurrence. Complete understanding of the closure process and ability of its accurate assessment is in best interest of scientific and engineering community. In this paper, three-dimensional numerical model of M(T) specimen with straight crack front was created and subjected to loading at various load ratios from R = -1 to R = 0.1. Settings of input parameters such as element size, length of the crack growth, number of substeps and contact elements were adopted from two-dimensional analyses. Closure levels were determined by the method of first node behind the crack tip displacement monitoring. Closure level determination was performed locally for each node along the crack front, respecting the distribution of the stress intensity factor. Results were compared to experimental results and discussion on the reasons of fatigue crack front curvature was provided.

Keywords

Crack front curvature; Fatigue crack propagation; Finite element analysis; Plasticity induced crack closure

Authors

OPLT, T.; HUTAŘ, P.; POKORNÝ, P.; NÁHLÍK, L.; BERTO, F.

Released

19. 2. 2020

Publisher

Elsevier B.V.

ISBN

2452-3216

Periodical

Procedia Structural Integrity

Year of study

23

Number

-

State

Republic of Italy

Pages from

101

Pages to

106

Pages count

6

URL

https://www.sciencedirect.com/science/article/pii/S2452321620301293

BibTex

@article{BUT177131,
  author="Tomáš {Oplt} and Pavel {Hutař} and Pavel {Pokorný} and Luboš {Náhlík} and Filippo {Berto}",
  title="Numerical evaluation of plasticity induced crack closure in 3D structures",
  journal="Procedia Structural Integrity",
  year="2020",
  volume="23",
  number="-",
  pages="101--106",
  doi="10.1016/j.prostr.2020.01.070",
  issn="2452-3216",
  url="https://www.sciencedirect.com/science/article/pii/S2452321620301293"
}