Characterization of crack propagation behavior in Al-7075 under in-plane biaxial fatigue loading with shear overloads

Abhay K. Singh; Siddhant Datta; Aditi Chattopadhyay; Nam Phan

doi:10.1016/j.ijfatigue.2020.105529

Characterization of crack propagation behavior in Al-7075 under in-plane biaxial fatigue loading with shear overloads

Abhay K. Singh, Siddhant Datta, Aditi Chattopadhyay, Nam Phan

Engineering, Ira A. Fulton Schools of (IAFSE)

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

11 Scopus citations

Abstract

Effect of shear overloads in an otherwise constant amplitude, tensile biaxial fatigue loading is investigated using a cruciform specimen of Al 7075-T651, and the crack propagation behavior and governing micromechanisms are characterized. It was observed that with an increase in shear overload ratio fatigue life of the specimen is increased and the crack growth rate is significantly affected. This behavior is attributed to the combined effects of competing mechanisms including compressive residual stress, plasticity induced crack closure, and strain hardening. The fractographic study revealed features of shear fracture in the transient region and tensile fracture in the pre-overload region and post-overload region.

Original language	English (US)
Article number	105529
Journal	International Journal of Fatigue
Volume	134
DOIs	https://doi.org/10.1016/j.ijfatigue.2020.105529
State	Published - May 2020

Keywords

Biaxial fatigue
Crack propagation
Crack retardation
Fractography
Shear overloads

ASJC Scopus subject areas

Modeling and Simulation
Materials Science(all)
Mechanics of Materials
Mechanical Engineering
Industrial and Manufacturing Engineering

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10.1016/j.ijfatigue.2020.105529

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title = "Characterization of crack propagation behavior in Al-7075 under in-plane biaxial fatigue loading with shear overloads",

abstract = "Effect of shear overloads in an otherwise constant amplitude, tensile biaxial fatigue loading is investigated using a cruciform specimen of Al 7075-T651, and the crack propagation behavior and governing micromechanisms are characterized. It was observed that with an increase in shear overload ratio fatigue life of the specimen is increased and the crack growth rate is significantly affected. This behavior is attributed to the combined effects of competing mechanisms including compressive residual stress, plasticity induced crack closure, and strain hardening. The fractographic study revealed features of shear fracture in the transient region and tensile fracture in the pre-overload region and post-overload region.",

keywords = "Biaxial fatigue, Crack propagation, Crack retardation, Fractography, Shear overloads",

author = "Singh, {Abhay K.} and Siddhant Datta and Aditi Chattopadhyay and Nam Phan",

note = "Funding Information: The research is sponsored by the U.S. Navy Naval Air Systems Command through Cooperative Agreement P-8A Aircraft Support for PMA-290 , Program Manager Nam Phan. Funding Information: The research is sponsored by the U.S. Navy Naval Air Systems Command through Cooperative Agreement P-8A Aircraft Support for PMA-290, Program Manager Nam Phan. Publisher Copyright: {\textcopyright} 2020 Elsevier Ltd",

year = "2020",

month = may,

doi = "10.1016/j.ijfatigue.2020.105529",

language = "English (US)",

volume = "134",

journal = "International Journal of Fatigue",

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AU - Singh, Abhay K.

AU - Datta, Siddhant

AU - Chattopadhyay, Aditi

AU - Phan, Nam

N1 - Funding Information: The research is sponsored by the U.S. Navy Naval Air Systems Command through Cooperative Agreement P-8A Aircraft Support for PMA-290 , Program Manager Nam Phan. Funding Information: The research is sponsored by the U.S. Navy Naval Air Systems Command through Cooperative Agreement P-8A Aircraft Support for PMA-290, Program Manager Nam Phan. Publisher Copyright: © 2020 Elsevier Ltd

PY - 2020/5

Y1 - 2020/5

N2 - Effect of shear overloads in an otherwise constant amplitude, tensile biaxial fatigue loading is investigated using a cruciform specimen of Al 7075-T651, and the crack propagation behavior and governing micromechanisms are characterized. It was observed that with an increase in shear overload ratio fatigue life of the specimen is increased and the crack growth rate is significantly affected. This behavior is attributed to the combined effects of competing mechanisms including compressive residual stress, plasticity induced crack closure, and strain hardening. The fractographic study revealed features of shear fracture in the transient region and tensile fracture in the pre-overload region and post-overload region.

AB - Effect of shear overloads in an otherwise constant amplitude, tensile biaxial fatigue loading is investigated using a cruciform specimen of Al 7075-T651, and the crack propagation behavior and governing micromechanisms are characterized. It was observed that with an increase in shear overload ratio fatigue life of the specimen is increased and the crack growth rate is significantly affected. This behavior is attributed to the combined effects of competing mechanisms including compressive residual stress, plasticity induced crack closure, and strain hardening. The fractographic study revealed features of shear fracture in the transient region and tensile fracture in the pre-overload region and post-overload region.

KW - Biaxial fatigue

KW - Crack propagation

KW - Crack retardation

KW - Fractography

KW - Shear overloads

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Characterization of crack propagation behavior in Al-7075 under in-plane biaxial fatigue loading with shear overloads

Abstract

Keywords

ASJC Scopus subject areas

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