abstract

• The influence of variable load spectra in the fatigue crack growth (FCG) was analyzed. A 4.1%25 interference was pre-set to some specimens by an expansion operation. As-drilled hole and hole expanded specimens were subjected to FCG tests under a combination of baseline cyclic loading and periodic overloads or underloads applied. Fatigue life was of approximately 1 million of cycles for the as-drilled hole, and 3.5 million of cycles for the hole cold expanded. The pre-setting operation and variable load spectra interaction exhibited a synergy, which was associated with multiple periods of retardation and arresting observed in the crack growth rate. © 2020 Elsevier Ltd

authors

• Ambriz R.R.
• García López Christian Jesús
• Jaramillo D.
• Ramos Azpeitia Mitsuo Osvaldo
• Rodríguez Reyna Sandra Luz

publication date

• 2020-01-01

funding provided via

• 511-6/17-7930, C19-FAI-05-34.34  Grant

published in

• International Journal of Fatigue  Journal

keywords

• Crack growth rate; Hole cold expansion; Overloads; Residual stresses; Retardation Cracks; Cyclic loads; Fatigue crack propagation; Growth rate; Infill drilling; Structural loads; Drilled holes; Periodic overloads; Pre-setting; Synergy effect; Variable loads; Fatigue of materials

Digital Object Identifier (DOI)

• 10.1016/j.ijfatigue.2020.105807

start page

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volume

• 140