Fracture and Structural Integrity e-ISSN 1971-8993 Open access
Miscellanea Vol. 9, No. 33 (2015)

A numerical study of non-linear crack tip parameters

Author and affiliation details
DOI
10.3221/IGF-ESIS.33.25
Pages
pages 199-208
Published
Published inVol. 9, No. 33 (2015)Go to the issue

Abstract

Crack closure concept has been widely used to explain different issues of fatigue crack propagation. However, different authors have questioned the relevance of crack closure and have proposed alternative concepts. The main objective here is to check the effectiveness of crack closure concept by linking the contact of crack flanks with non-linear crack tip parameters. Accordingly, 3D-FE numerical models with and without contact were developed for a wide range of loading scenarios and the crack tip parameters usually linked to fatigue crack growth, namely range of cyclic plastic strain, crack tip opening displacement, size of reversed plastic zone and total plastic dissipation per cycle, were investigated. It was demonstrated that: i) LEFM concepts are applicable to the problem under study; ii) the crack closure phenomenon has a great influence on crack tip parameters decreasing their values; iii) the ?Keff concept is able to explain the variations of crack tip parameters produced by the contact of crack flanks; iv) the analysis of remote compliance is the best numerical parameter to quantify the crack opening level; v) without contact there is no effect of stress ratio on crack tip parameters. Therefore it is proved that the crack closure concept is valid.

Keywords

Article history

  1. ReceivedUntil the next stage: 0 days
  2. AcceptedUntil the next stage: 0 days
  3. Published

How to cite

APA

Antunes, F., Branco, R., Correia, L., & Ramalho, A. (2015). A numerical study of non-linear crack tip parameters. Fracture and Structural Integrity, 9(33), pages 199–208. https://doi.org/10.3221/IGF-ESIS.33.25

IEEE

F. Antunes, R. Branco, L. Correia, and A. Ramalho, “A numerical study of non-linear crack tip parameters,” Fracture and Structural Integrity, vol. 9, no. 33, pp. pages 199–208, 2015, doi: 10.3221/IGF-ESIS.33.25.

MLA

Antunes, F.V., et al. “A numerical study of non-linear crack tip parameters.” Fracture and Structural Integrity, vol. 9, no. 33, 2015, pp. pages 199–208. https://doi.org/10.3221/IGF-ESIS.33.25.

Chicago

Antunes, F.V., R. Branco, L. Correia, and AL Ramalho. 2015. “A numerical study of non-linear crack tip parameters.” Fracture and Structural Integrity 9 (33): pages 199–208. https://doi.org/10.3221/IGF-ESIS.33.25.

Harvard

Antunes, F., Branco, R., Correia, L. and Ramalho, A. (2015) ‘A numerical study of non-linear crack tip parameters’, Fracture and Structural Integrity, 9(33), pp. pages 199–208. doi: 10.3221/IGF-ESIS.33.25.

Vancouver

Antunes F, Branco R, Correia L, Ramalho A. A numerical study of non-linear crack tip parameters. Fracture and Structural Integrity. 2015;9(33):pages 199-208. doi:10.3221/IGF-ESIS.33.25

BibTeX

@article{antunes2015, author = {Antunes, F.V. and Branco, R. and Correia, L. and Ramalho, AL}, title = {A numerical study of non-linear crack tip parameters}, journal = {Fracture and Structural Integrity}, year = {2015}, volume = {9}, number = {33}, pages = {pages 199--208}, doi = {10.3221/IGF-ESIS.33.25}, url = {https://doi.org/10.3221/IGF-ESIS.33.25}, issn = {1971-8993} }

RIS

TY - JOUR AU - Antunes, F.V. AU - Branco, R. AU - Correia, L. AU - Ramalho, AL TI - A numerical study of non-linear crack tip parameters JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2015 DA - 2015/06/19 VL - 9 IS - 33 SP - pages 199 EP - 208 DO - 10.3221/IGF-ESIS.33.25 UR - https://doi.org/10.3221/IGF-ESIS.33.25 SN - 1971-8993 ER -

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