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

doi:10.1002/adem.201600069

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

Department of Mechanical Engineering

University of Oxford

Research output: Contribution to journal › Article › peer-review

29 Citations (SciVal)

102 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 language	English
Pages (from-to)	2076-2087
Number of pages	12
Journal	Advanced Engineering Materials
Volume	18
Issue number	12
DOIs	https://doi.org/10.1002/adem.201600069
Publication status	Published - 1 Dec 2016

ASJC Scopus subject areas

General Materials Science
Condensed Matter Physics

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10.1002/adem.201600069

Elucidating_the_Mechanism_of_Fatigue_Crack_AccelerAccepted author manuscript, 2.86 MB

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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.",

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AU - Salvati, Enrico

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AU - Fong, Kai Soon

AU - Song, Xu

AU - Korsunsky, Alexander M.

PY - 2016/12/1

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N2 - 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.

AB - 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.

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

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Alexander Lunt

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

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Alexander Lunt

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