A link-up resulted fatigue crack branching in Al–Cu–Mg alloy

Songsong Lu; Rui Bao; Ting Zhang; Binjun Fei

doi:10.1016/j.ijfatigue.2016.02.036

A link-up resulted fatigue crack branching in Al–Cu–Mg alloy

Songsong Lu
, Rui Bao^*
, Ting Zhang
, Binjun Fei

^*Corresponding author for this work

School of Aeronautic Science and Engineering

Beihang University

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

11 Scopus citations

Abstract

Fatigue crack branching phenomena in Al–Cu–Mg alloy 2324-T39 are studied. Both spectrum and constant amplitude loading cases are examined. A novel type of crack branching process and mechanism is present, which results from the link-up of the secondary crack with the main crack. The grain shapes in 2324-T39 are different from those in the 2024 and 2524 alloys, and their interaction with the plastic zone size contributes to the appearance of this type of crack branching. FE analysis shows that the surface secondary crack is located near the plastic zone boundaries of the main crack.

Original language	English
Pages (from-to)	459-469
Number of pages	11
Journal	International Journal of Fatigue
Volume	92
DOIs	https://doi.org/10.1016/j.ijfatigue.2016.02.036
State	Published - 1 Nov 2016

Keywords

Al–Cu–Mg alloy
Crack branching
Fatigue crack growth
Spectrum loading

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10.1016/j.ijfatigue.2016.02.036

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title = "A link-up resulted fatigue crack branching in Al–Cu–Mg alloy",

abstract = "Fatigue crack branching phenomena in Al–Cu–Mg alloy 2324-T39 are studied. Both spectrum and constant amplitude loading cases are examined. A novel type of crack branching process and mechanism is present, which results from the link-up of the secondary crack with the main crack. The grain shapes in 2324-T39 are different from those in the 2024 and 2524 alloys, and their interaction with the plastic zone size contributes to the appearance of this type of crack branching. FE analysis shows that the surface secondary crack is located near the plastic zone boundaries of the main crack.",

keywords = "Al–Cu–Mg alloy, Crack branching, Fatigue crack growth, Spectrum loading",

author = "Songsong Lu and Rui Bao and Ting Zhang and Binjun Fei",

note = "Publisher Copyright: {\textcopyright} 2016 Elsevier Ltd",

year = "2016",

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doi = "10.1016/j.ijfatigue.2016.02.036",

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T1 - A link-up resulted fatigue crack branching in Al–Cu–Mg alloy

AU - Lu, Songsong

AU - Bao, Rui

AU - Zhang, Ting

AU - Fei, Binjun

PY - 2016/11/1

Y1 - 2016/11/1

N2 - Fatigue crack branching phenomena in Al–Cu–Mg alloy 2324-T39 are studied. Both spectrum and constant amplitude loading cases are examined. A novel type of crack branching process and mechanism is present, which results from the link-up of the secondary crack with the main crack. The grain shapes in 2324-T39 are different from those in the 2024 and 2524 alloys, and their interaction with the plastic zone size contributes to the appearance of this type of crack branching. FE analysis shows that the surface secondary crack is located near the plastic zone boundaries of the main crack.

AB - Fatigue crack branching phenomena in Al–Cu–Mg alloy 2324-T39 are studied. Both spectrum and constant amplitude loading cases are examined. A novel type of crack branching process and mechanism is present, which results from the link-up of the secondary crack with the main crack. The grain shapes in 2324-T39 are different from those in the 2024 and 2524 alloys, and their interaction with the plastic zone size contributes to the appearance of this type of crack branching. FE analysis shows that the surface secondary crack is located near the plastic zone boundaries of the main crack.

KW - Al–Cu–Mg alloy

KW - Crack branching

KW - Fatigue crack growth

KW - Spectrum loading

UR - https://www.scopus.com/pages/publications/84959377953

U2 - 10.1016/j.ijfatigue.2016.02.036

DO - 10.1016/j.ijfatigue.2016.02.036

M3 - 文章

AN - SCOPUS:84959377953

SN - 0142-1123

VL - 92

SP - 459

EP - 469

JO - International Journal of Fatigue

JF - International Journal of Fatigue

ER -

A link-up resulted fatigue crack branching in Al–Cu–Mg alloy

Abstract

Keywords

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