Fracture and Structural Integrity e-ISSN 1971-8993 Open access
SI: Crack Paths Vol. 13, No. 48 (2019)

Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks

Author and affiliation details
DOI
10.3221/IGF-ESIS.48.59
Pages
611-629
Published
Published inVol. 13, No. 48 (2019)Go to the issue

Abstract

Part-through surface or corner 2D cracks are commonly found in structural components, even because practically all fatigue cracks tend to start this way. It is a reasonable hypothesis to model them assuming the shape of their fronts is approximately an elliptic arc, as supported by many fractographic observations. But their transition to a 1D through-crack, an important issue in many practical applications, is normally not properly addressed in fatigue life predictions. Although experimental results reveal that the frontier of surface cracks essentially retain their elliptical shape as they gradually grow into a through-crack, it is usual to assume they are immediately transformed into a through-crack when their depth reaches the cracked component thickness. This crude approximation may create a large jump in stress intensity values, leading to excessively conservative fatigue crack growth predictions, or else the crude shape jump hypothesis may induce false overload events that can much affect fatigue crack growth retardation models, leading to inadmissible non-conservative life predictions. To minimize such problems, an improved model to describe the transition of 2D surface cracks to 1D through-cracks is proposed and verified by crack propagation tests in two different materials, 4340 steel and polycarbonate (PC). Moreover, fatigue life predictions based on this improved model are compared with experimental results.

Keywords

Article history

  1. ReceivedUntil the next stage: 45 days
  2. Revision requestedUntil the next stage: 12 days
  3. RevisedUntil the next stage: 5 days
  4. AcceptedUntil the next stage: 37 days
  5. Published

How to cite

APA

Miranda, A., Marques, R., Meggiolaro, M. A., & Pinho de Castro, J. T. (2019). Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks. Fracture and Structural Integrity, 13(48), 611–629. https://doi.org/10.3221/IGF-ESIS.48.59

IEEE

A. Miranda, R. Marques, M. A. Meggiolaro, and J. T. Pinho de Castro, “Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks,” Fracture and Structural Integrity, vol. 13, no. 48, pp. 611–629, 2019, doi: 10.3221/IGF-ESIS.48.59.

MLA

Miranda, Antonio, et al. “Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks.” Fracture and Structural Integrity, vol. 13, no. 48, 2019, pp. 611–629. https://doi.org/10.3221/IGF-ESIS.48.59.

Chicago

Miranda, Antonio, Rafael Marques, Marco Antonio Meggiolaro, and Jaime Tupiassú Pinho de Castro. 2019. “Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks.” Fracture and Structural Integrity 13 (48): 611–629. https://doi.org/10.3221/IGF-ESIS.48.59.

Harvard

Miranda, A., Marques, R., Meggiolaro, M.A. and Pinho de Castro, J.T. (2019) ‘Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks’, Fracture and Structural Integrity, 13(48), pp. 611–629. doi: 10.3221/IGF-ESIS.48.59.

Vancouver

Miranda A, Marques R, Meggiolaro MA, Pinho de Castro JT. Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks. Fracture and Structural Integrity. 2019;13(48):611-629. doi:10.3221/IGF-ESIS.48.59

BibTeX

@article{miranda2019, author = {Miranda, Antonio and Marques, Rafael and Meggiolaro, Marco Antonio and Pinho de Castro, Jaime Tupiassú}, title = {Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks}, journal = {Fracture and Structural Integrity}, year = {2019}, volume = {13}, number = {48}, pages = {611--629}, doi = {10.3221/IGF-ESIS.48.59}, url = {https://doi.org/10.3221/IGF-ESIS.48.59}, issn = {1971-8993} }

RIS

TY - JOUR AU - Miranda, Antonio AU - Marques, Rafael AU - Meggiolaro, Marco Antonio AU - Pinho de Castro, Jaime Tupiassú TI - Stress Intensity Factor Equations for the Evolution of Surface and Corner Cracks to Through Cracks JO - Fracture and Structural Integrity T2 - Fracture and Structural Integrity PY - 2019 DA - 2019/03/08 VL - 13 IS - 48 SP - 611 EP - 629 DO - 10.3221/IGF-ESIS.48.59 UR - https://doi.org/10.3221/IGF-ESIS.48.59 SN - 1971-8993 ER -

Licence

Copyright © 2019 Antonio Miranda, Rafael Marques, Marco Antonio Meggiolaro, Jaime Tupiassú Pinho de Castro.

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

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