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Geometrical size effect in the fatigue life predictions of aluminum wires with micro holes using methods of the critical distance

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Abstract
Recent research has shown that fretting fatigue is the main cause of fatigue failure in electrical transmission lines, and this phenomenon can be modeled as a stress concentration problem. The present study investigates the expected fatigue life of aluminum alloy 6201-T81 wires with micro holes, used in cables for transmission lines. The expected fatigue life of wires with micro holes is calculated based on the Theory of Critical Distances (TCD), where the characteristic size of the material (L-M) varies with the number of cycles to failure (N-f), establishing an L-M(N-f) relation. To calibrate this relation, two S-N calibration curves were plotted with fully reversed uniaxial fatigue tests carried out on smooth wires (unnotched) and wires with a sharp notch. Experimental a-N curves were constructed for different types of holes to validate and evaluate fatigue life prediction results of wires with micro holes, more precisely: (1) two through holes (TH), with diameters of 0.5 and 0.7 mm, and (ii) two types of blind holes (BH), with diameters and depths of 0.1 x 0.1 mm and 0.7 x 0.7 mm, respectively.
Keywords
Mechanical Engineering, General Materials Science, Mechanics of Materials, Fracture mechanics, Critical distances, Fatigue, HIGH-CYCLE FATIGUE, FRETTING FATIGUE, TRANSMISSION-LINE, STRESS, STRENGTH, ALLOY, ORIENTATION, MECHANICS, CONDUCTOR, CONTACT

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MLA
Martínez, J. M. G., et al. “Geometrical Size Effect in the Fatigue Life Predictions of Aluminum Wires with Micro Holes Using Methods of the Critical Distance.” ENGINEERING FRACTURE MECHANICS, vol. 209, 2019, pp. 147–61.
APA
Martínez, J. M. G., Soares Rabelo Adriano, V., Araújo, J. A., Ferreira, J. L. A., & da Silva, C. R. M. (2019). Geometrical size effect in the fatigue life predictions of aluminum wires with micro holes using methods of the critical distance. ENGINEERING FRACTURE MECHANICS, 209, 147–161.
Chicago author-date
Martínez, J. M. G., Vitor Soares Rabelo Adriano, J. A. Araújo, J. L. A. Ferreira, and C.R.M. da Silva. 2019. “Geometrical Size Effect in the Fatigue Life Predictions of Aluminum Wires with Micro Holes Using Methods of the Critical Distance.” ENGINEERING FRACTURE MECHANICS 209: 147–61.
Chicago author-date (all authors)
Martínez, J. M. G., Vitor Soares Rabelo Adriano, J. A. Araújo, J. L. A. Ferreira, and C.R.M. da Silva. 2019. “Geometrical Size Effect in the Fatigue Life Predictions of Aluminum Wires with Micro Holes Using Methods of the Critical Distance.” ENGINEERING FRACTURE MECHANICS 209: 147–161.
Vancouver
1.
Martínez JMG, Soares Rabelo Adriano V, Araújo JA, Ferreira JLA, da Silva CRM. Geometrical size effect in the fatigue life predictions of aluminum wires with micro holes using methods of the critical distance. ENGINEERING FRACTURE MECHANICS. 2019;209:147–61.
IEEE
[1]
J. M. G. Martínez, V. Soares Rabelo Adriano, J. A. Araújo, J. L. A. Ferreira, and C. R. M. da Silva, “Geometrical size effect in the fatigue life predictions of aluminum wires with micro holes using methods of the critical distance,” ENGINEERING FRACTURE MECHANICS, vol. 209, pp. 147–161, 2019.
@article{8620135,
  abstract     = {Recent research has shown that fretting fatigue is the main cause of fatigue failure in electrical transmission lines, and this phenomenon can be modeled as a stress concentration problem. The present study investigates the expected fatigue life of aluminum alloy 6201-T81 wires with micro holes, used in cables for transmission lines. The expected fatigue life of wires with micro holes is calculated based on the Theory of Critical Distances (TCD), where the characteristic size of the material (L-M) varies with the number of cycles to failure (N-f), establishing an L-M(N-f) relation. To calibrate this relation, two S-N calibration curves were plotted with fully reversed uniaxial fatigue tests carried out on smooth wires (unnotched) and wires with a sharp notch. Experimental a-N curves were constructed for different types of holes to validate and evaluate fatigue life prediction results of wires with micro holes, more precisely: (1) two through holes (TH), with diameters of 0.5 and 0.7 mm, and (ii) two types of blind holes (BH), with diameters and depths of 0.1 x 0.1 mm and 0.7 x 0.7 mm, respectively.},
  author       = {Martínez, J. M. G. and Soares Rabelo Adriano, Vitor and Araújo, J. A. and Ferreira, J. L. A. and da Silva, C.R.M.},
  issn         = {0013-7944},
  journal      = {ENGINEERING FRACTURE MECHANICS},
  keywords     = {Mechanical Engineering,General Materials Science,Mechanics of Materials,Fracture mechanics,Critical distances,Fatigue,HIGH-CYCLE FATIGUE,FRETTING FATIGUE,TRANSMISSION-LINE,STRESS,STRENGTH,ALLOY,ORIENTATION,MECHANICS,CONDUCTOR,CONTACT},
  language     = {eng},
  pages        = {147--161},
  title        = {Geometrical size effect in the fatigue life predictions of aluminum wires with micro holes using methods of the critical distance},
  url          = {http://dx.doi.org/10.1016/j.engfracmech.2018.12.034},
  volume       = {209},
  year         = {2019},
}

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