The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded 7075-T6 aluminium alloy panel under biaxial loading

Xiushuo Zhang; Yu'e Ma; Zhenhai Wang; Yanning Guo

doi:10.1111/ffe.13395

The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded 7075-T6 aluminium alloy panel under biaxial loading

Xiushuo Zhang, Yu'e Ma, Zhenhai Wang, Yanning Guo

School of Aeronautics

Northwestern Polytechnical University Xian

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

6 Scopus citations

Abstract

The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded (FSW) 7075-T6 panel under biaxial loading was investigated. Stress intensity factors (K_I and K_II) were used to study the effects of residual stress on crack behaviours with five different biaxial loading ratios. It was observed that residual stress has a considerable effect on the mixed-mode crack growth. In most cases, the crack deviation from the initial crack is mainly affected by residual stress at the beginning of crack propagation. The variation of crack path is strongly linked with the residual stress as well as the biaxial loading ratio. In addition, K_I and K_II are susceptible to residual stress under biaxial loading conditions. Residual stresses contribute to a higher proportion of K_II compared with that of K_I. K_I and K_II in the retreating side are more affected by the residual stress.

Original language	English
Pages (from-to)	805-821
Number of pages	17
Journal	Fatigue and Fracture of Engineering Materials and Structures
Volume	44
Issue number	3
DOIs	https://doi.org/10.1111/ffe.13395
State	Published - Mar 2021

Keywords

biaxial loading
crack path
friction stir welding
mixed-mode fatigue crack propagation
residual stress

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10.1111/ffe.13395

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title = "The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded 7075-T6 aluminium alloy panel under biaxial loading",

abstract = "The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded (FSW) 7075-T6 panel under biaxial loading was investigated. Stress intensity factors (KI and KII) were used to study the effects of residual stress on crack behaviours with five different biaxial loading ratios. It was observed that residual stress has a considerable effect on the mixed-mode crack growth. In most cases, the crack deviation from the initial crack is mainly affected by residual stress at the beginning of crack propagation. The variation of crack path is strongly linked with the residual stress as well as the biaxial loading ratio. In addition, KI and KII are susceptible to residual stress under biaxial loading conditions. Residual stresses contribute to a higher proportion of KII compared with that of KI. KI and KII in the retreating side are more affected by the residual stress.",

keywords = "biaxial loading, crack path, friction stir welding, mixed-mode fatigue crack propagation, residual stress",

author = "Xiushuo Zhang and Yu'e Ma and Zhenhai Wang and Yanning Guo",

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AU - Zhang, Xiushuo

AU - Ma, Yu'e

AU - Wang, Zhenhai

AU - Guo, Yanning

PY - 2021/3

Y1 - 2021/3

N2 - The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded (FSW) 7075-T6 panel under biaxial loading was investigated. Stress intensity factors (KI and KII) were used to study the effects of residual stress on crack behaviours with five different biaxial loading ratios. It was observed that residual stress has a considerable effect on the mixed-mode crack growth. In most cases, the crack deviation from the initial crack is mainly affected by residual stress at the beginning of crack propagation. The variation of crack path is strongly linked with the residual stress as well as the biaxial loading ratio. In addition, KI and KII are susceptible to residual stress under biaxial loading conditions. Residual stresses contribute to a higher proportion of KII compared with that of KI. KI and KII in the retreating side are more affected by the residual stress.

AB - The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded (FSW) 7075-T6 panel under biaxial loading was investigated. Stress intensity factors (KI and KII) were used to study the effects of residual stress on crack behaviours with five different biaxial loading ratios. It was observed that residual stress has a considerable effect on the mixed-mode crack growth. In most cases, the crack deviation from the initial crack is mainly affected by residual stress at the beginning of crack propagation. The variation of crack path is strongly linked with the residual stress as well as the biaxial loading ratio. In addition, KI and KII are susceptible to residual stress under biaxial loading conditions. Residual stresses contribute to a higher proportion of KII compared with that of KI. KI and KII in the retreating side are more affected by the residual stress.

KW - biaxial loading

KW - crack path

KW - friction stir welding

KW - mixed-mode fatigue crack propagation

KW - residual stress

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DO - 10.1111/ffe.13395

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JO - Fatigue and Fracture of Engineering Materials and Structures

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ER -

The effect of residual stress on mixed-mode crack propagation behaviour in friction stir welded 7075-T6 aluminium alloy panel under biaxial loading

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