Crack Growth Patterns of Aluminum Tubular Specimens Subjected to Cyclic Tensile Loads

Lenin Abatta-Jacome, Luis Caminos, Antonio Gonzalez-Herrera, Jose Manuel Garcia-Manrique

Research output: Contribution to journalArticlepeer-review

Abstract

This study presents a detailed analysis of a fatigue test campaign in order to identify different crack patterns. It was conducted on 6061-T6 aluminum tubular specimens featuring an internal diameter of 10 mm and different thicknesses (2, 3 and 4 mm). These specimens were subjected to cyclic tensile loads with a load ratio of R = 0.1, utilizing a sinusoidal load function at a frequency of 3 Hz. The investigation examines the crack growth rates, the stress intensity factor, and the final and intermediate fracture zones by applying overloads in some cases. The differences with two-dimensional specimens and the importance of this study for the interpretation of results with biaxial loading states are highlighted. The different states of crack growth detected are analyzed using artificial vision techniques. The differences between the exterior and interior faces of the specimen are revealed, and a series of states prior to the formation of the radial crack front expected in these specimens are identified.

Original languageEnglish
Article number1094
JournalMetals
Volume14
Issue number10
DOIs
StatePublished - Oct 2024
Externally publishedYes

Keywords

  • SEM
  • cyclic tensile loads
  • fatigue crack growth
  • tubular specimen

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