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From NASGRO to fractals: Representing crack growth in metals

Jones, R. and Chen, F. and Pitt, S. and Paggi, Marco and Carpinteri, Alberto From NASGRO to fractals: Representing crack growth in metals. International Journal of Fatigue, 82. pp. 540-549. ISSN 0142-1123 (2016)

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This paper presents the results of an extensive experimental analysis of the fractal properties of fatigue crack rough surfaces. The analysis of the power-spectral density functions of profilometric traces shows a predominance of the box fractal dimension D = 1.2. This result leads to a particularization of the fatigue crack growth equation based on fractality proposed by the last two authors which is very close to the generalized Frost–Dugdale equation proposed by the first three authors. The two approaches, albeit based on different initial modelling assumptions, are both very effective in predicting the crack growth rate of short cracks.

Item Type: Article
Identification Number: 10.1016/j.ijfatigue.2015.09.009
Projects: FIRB Future in Research RBFR107AKG
Funders: MIUR
Uncontrolled Keywords: Fatigue crack growth models; Fractality; Fatigue experiments; Profilometric analysis; Roughness
Subjects: Q Science > Q Science (General)
T Technology > TJ Mechanical engineering and machinery
Research Area: Computer Science and Applications
Depositing User: Prof Marco Paggi
Date Deposited: 19 Apr 2016 08:06
Last Modified: 19 Apr 2016 08:06
URI: http://eprints.imtlucca.it/id/eprint/3456

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