Elucidating the Mechanism of Fatigue Crack Acceleration Following the Occurrence of an Underload

Enrico Salvati, Tan Sui, Hongjia Zhang, Alexander J.G. Lunt, Kai Soon Fong, Xu Song, Alexander M. Korsunsky

Research output: Contribution to journalArticlepeer-review

10 Citations (Scopus)
38 Downloads (Pure)

Abstract

Fatigue Crack Growth Rate (FCGR) is altered by a single anomalous load exceeding cyclic maximum (Overload) or compressive load below cyclic minimum (Underload). The authors study fatigue crack acceleration due to a single compressive Underload using residual stress mapping (by synchrotron XRD) and crack closure analysis (by DIC). The relative influence and duration of these two principal causes of FCGR alteration are revealed. Validated FEA model is used for parametric analysis of the effect of baseline cyclic loading ratio and magnitude of Underload on the cyclic J-integral.

Original languageEnglish
Pages (from-to)2076-2087
Number of pages12
JournalAdvanced Engineering Materials
Volume18
Issue number12
DOIs
Publication statusPublished - 1 Dec 2016

ASJC Scopus subject areas

  • Materials Science(all)
  • Condensed Matter Physics

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