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

Some experimental observations of crack-tip mechanics with displacement data

Author and affiliation details
  • M. Mokhtari Corresponding author plopezcrespo@uma.es
  • P. Lopez-Crespo
  • B. Moreno
  • M. Zanganeh
DOI
10.3221/IGF-ESIS.33.18
Pages
pages 143-150
Published
Published inVol. 9, No. 33 (2015)Go to the issue

Abstract

In the past two decades, crack-tip mechanics has been increasingly studied with full-field techniques. Within these techniques, Digital Image Correlation (DIC) has been most widely used due to its many advantages, to extract important crack-tip information, including Stress Intensity Factor (SIF), Crack Opening Displacement, J-integral, T-stress, closure level, plastic zone size, etc. However, little information is given in the literature about the experimental setup that provides best estimations for the different parameters.
The current work aims at understanding how the experimental conditions used in DIC influence the crack-tip
information extracted experimentally. The influence of parameters such as magnification factor, size of the
images, position of the images with respect the crack-tip and size of the subset used in the correlation is studied. The influence is studied in terms of SIF and T-stress by using Williams’ model. The concept of  determination of  the K-dominance zone from experimental data has also explored. In this regard, cyclic loading on a fatigue crack in a compact tension (CT) specimen, made of aluminium 2024-T351 alloy, has been applied and the surface deformation ahead of the crack tip has been examined. The comparison between theoretical and experimental values of KI showed that the effect of subset size on the measured KI is negligible compared to the effect of size of the image.

Keywords

Article history

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

How to cite

APA

Mokhtari, M., Lopez-Crespo, P., Moreno, B., & Zanganeh, M. (2015). Some experimental observations of crack-tip mechanics with displacement data. Fracture and Structural Integrity, 9(33), pages 143–150. https://doi.org/10.3221/IGF-ESIS.33.18

IEEE

M. Mokhtari, P. Lopez-Crespo, B. Moreno, and M. Zanganeh, “Some experimental observations of crack-tip mechanics with displacement data,” Fracture and Structural Integrity, vol. 9, no. 33, pp. pages 143–150, 2015, doi: 10.3221/IGF-ESIS.33.18.

MLA

Mokhtari, M., et al. “Some experimental observations of crack-tip mechanics with displacement data.” Fracture and Structural Integrity, vol. 9, no. 33, 2015, pp. pages 143–150. https://doi.org/10.3221/IGF-ESIS.33.18.

Chicago

Mokhtari, M., P. Lopez-Crespo, B. Moreno, and M. Zanganeh. 2015. “Some experimental observations of crack-tip mechanics with displacement data.” Fracture and Structural Integrity 9 (33): pages 143–150. https://doi.org/10.3221/IGF-ESIS.33.18.

Harvard

Mokhtari, M., Lopez-Crespo, P., Moreno, B. and Zanganeh, M. (2015) ‘Some experimental observations of crack-tip mechanics with displacement data’, Fracture and Structural Integrity, 9(33), pp. pages 143–150. doi: 10.3221/IGF-ESIS.33.18.

Vancouver

Mokhtari M, Lopez-Crespo P, Moreno B, Zanganeh M. Some experimental observations of crack-tip mechanics with displacement data. Fracture and Structural Integrity. 2015;9(33):pages 143-150. doi:10.3221/IGF-ESIS.33.18

BibTeX

@article{mokhtari2015, author = {Mokhtari, M. and Lopez-Crespo, P. and Moreno, B. and Zanganeh, M.}, title = {Some experimental observations of crack-tip mechanics with displacement data}, journal = {Fracture and Structural Integrity}, year = {2015}, volume = {9}, number = {33}, pages = {pages 143--150}, doi = {10.3221/IGF-ESIS.33.18}, url = {https://doi.org/10.3221/IGF-ESIS.33.18}, issn = {1971-8993} }

RIS

TY - JOUR AU - Mokhtari, M. AU - Lopez-Crespo, P. AU - Moreno, B. AU - Zanganeh, M. TI - Some experimental observations of crack-tip mechanics with displacement data JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2015 DA - 2015/06/19 VL - 9 IS - 33 SP - pages 143 EP - 150 DO - 10.3221/IGF-ESIS.33.18 UR - https://doi.org/10.3221/IGF-ESIS.33.18 SN - 1971-8993 ER -

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