Fracture and Structural Integrity e-ISSN 1971-8993 Open access
SI: Characterisation of Crack Tip Fields Vol. 13, No. 49 (2019)

Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip

Author and affiliation details
  • Giancarlo luis Gómez Gonzáles Pontifical Catholic University of Rio de Janeiro, PUC-Rio.
  • Julián Andrés Ortiz González Corresponding author Pontifical Catholic University of Rio de Janeiro, PUC-Rio. julian@aluno.puc-rio.br
  • Jaime Tupiassú Pinho de Castro Pontifical Catholic University of Rio de Janeiro, PUC-Rio.
  • José Luiz de França Freire Pontifical Catholic University of Rio de Janeiro, PUC-Rio.
DOI
10.3221/IGF-ESIS.49.08
Pages
74-81
Published
Published inVol. 13, No. 49 (2019)Go to the issue

Abstract

A stereo microscope coupled to a 3-D Digital Image Correlation system is used to measure strain ranges on the cyclic plastic zone ahead of a fatigue crack-tip. First, a very refined speckle pattern is applied on the surface of a disk-shaped compact tension specimen of 1020 low-C steel by spraying toner powder over a layer of white paint, a suitable technique to produce the very small dots needed to map surface strain loops on that small region. This technique can achieve enough resolution to measure elastoplastic strain ranges Δε near the crack tip, which cause damage accumulation inside the cyclic plastic zone as the crack grows. The applied technique can identify as well the effects of other nonlinear phenomena that happen in the near-tip region, such as crack closure. Therefore, such measurements can be used to verify the validity of the hypotheses behind the main fatigue crack growth models.

Keywords

Article history

  1. ReceivedUntil the next stage: 4 days
  2. AcceptedUntil the next stage: 24 days
  3. Published

How to cite

APA

Gonzáles, G. L. G., González, J. A. O., Castro, J. T. P. D., & Freire, J. L. D. F. (2019). Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip. Fracture and Structural Integrity, 13(49), 74–81. https://doi.org/10.3221/IGF-ESIS.49.08

IEEE

G. L. G. Gonzáles, J. A. O. González, J. T. P. D. Castro, and J. L. D. F. Freire, “Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip,” Fracture and Structural Integrity, vol. 13, no. 49, pp. 74–81, 2019, doi: 10.3221/IGF-ESIS.49.08.

MLA

Gonzáles, Giancarlo luis Gómez, et al. “Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip.” Fracture and Structural Integrity, vol. 13, no. 49, 2019, pp. 74–81. https://doi.org/10.3221/IGF-ESIS.49.08.

Chicago

Gonzáles, Giancarlo luis Gómez, Julián Andrés Ortiz González, Jaime Tupiassú Pinho de Castro, and José Luiz de França Freire. 2019. “Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip.” Fracture and Structural Integrity 13 (49): 74–81. https://doi.org/10.3221/IGF-ESIS.49.08.

Harvard

Gonzáles, G.L.G., González, J.A.O., Castro, J.T.P.D. and Freire, J.L.D.F. (2019) ‘Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip’, Fracture and Structural Integrity, 13(49), pp. 74–81. doi: 10.3221/IGF-ESIS.49.08.

Vancouver

Gonzáles GLG, González JAO, Castro JTPD, Freire JLDF. Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip. Fracture and Structural Integrity. 2019;13(49):74-81. doi:10.3221/IGF-ESIS.49.08

BibTeX

@article{gonzales2019, author = {Gonzáles, Giancarlo luis Gómez and González, Julián Andrés Ortiz and Castro, Jaime Tupiassú Pinho de and Freire, José Luiz de França}, title = {Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip}, journal = {Fracture and Structural Integrity}, year = {2019}, volume = {13}, number = {49}, pages = {74--81}, doi = {10.3221/IGF-ESIS.49.08}, url = {https://doi.org/10.3221/IGF-ESIS.49.08}, issn = {1971-8993} }

RIS

TY - JOUR AU - Gonzáles, Giancarlo luis Gómez AU - González, Julián Andrés Ortiz AU - Castro, Jaime Tupiassú Pinho de AU - Freire, José Luiz de França TI - Using DIC techniques to measure strain ranges inside the cyclic plastic zone ahead of a fatigue crack tip JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2019 DA - 2019/05/24 VL - 13 IS - 49 SP - 74 EP - 81 DO - 10.3221/IGF-ESIS.49.08 UR - https://doi.org/10.3221/IGF-ESIS.49.08 SN - 1971-8993 ER -

Licence

Copyright © 2019 Giancarlo luis Gómez Gonzáles, Julián Andrés Ortiz González, Jaime Tupiassú Pinho de Castro, José Luiz de França Freire.

Copyright 
Authors are allowed to retain both the copyright and the publishing rights of their articles without restrictions.  

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