Evolution of residual stress during fatigue crack growth in an aluminium specimen with a bonded crack retarder

Abdul Syed; Michael E. Fitzpatrick; J.E. Moffatt

doi:10.1016/j.compstruct.2014.05.027

Evolution of residual stress during fatigue crack growth in an aluminium specimen with a bonded crack retarder

Abdul Syed, Michael E. Fitzpatrick, J.E. Moffatt

Open University

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

8 Citations (Scopus)

59 Downloads (Pure)

Abstract

The application of bonded crack retarders in critical aircraft integral structures has been of great interest recently for the improvement of damage tolerance. One potential disadvantage of bonded crack retarders is that the thermal residual stresses which are developed during the strap bonding process are detrimental to the performance of the structure. This investigation explores the distribution of thermal residual stresses developed in an aluminium substrate reinforced with GLARE (glass-fibre-reinforced epoxy) straps and the evolution of stresses during fatigue crack growth. Residual stress measurements were performed using neutron diffraction. The results show that tensile residual stresses are developed in the aluminium substrate as a consequence of the strap bonding process. In situ residual stress measurements during constant amplitude fatigue crack growth were performed and it was observed that the growth of the fatigue crack altered the initial residual stress.

Original language	English
Pages (from-to)	12-16
Journal	Composite Structures
Volume	117
Early online date	4 Jun 2014
DOIs	https://doi.org/10.1016/j.compstruct.2014.05.027
Publication status	Published - Nov 2014
Externally published	Yes

Bibliographical note

NOTICE: this is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures [vol 117 (2014)] DOI: 10.1016/j.compstruct.2014.05.027.

Keywords

bonded crack retarders
fatigue
GLARE
residual stress
structural composites

Access to Document

10.1016/j.compstruct.2014.05.027

Evolution of residual stress

Abdul Syed
- Centre for Manufacturing and Materials - Assistant Professor Research
Person: Teaching and Research

Cite this

@article{2795dffe2d114abdb2ac1f62cfba49ae,

title = "Evolution of residual stress during fatigue crack growth in an aluminium specimen with a bonded crack retarder",

abstract = "The application of bonded crack retarders in critical aircraft integral structures has been of great interest recently for the improvement of damage tolerance. One potential disadvantage of bonded crack retarders is that the thermal residual stresses which are developed during the strap bonding process are detrimental to the performance of the structure. This investigation explores the distribution of thermal residual stresses developed in an aluminium substrate reinforced with GLARE (glass-fibre-reinforced epoxy) straps and the evolution of stresses during fatigue crack growth. Residual stress measurements were performed using neutron diffraction. The results show that tensile residual stresses are developed in the aluminium substrate as a consequence of the strap bonding process. In situ residual stress measurements during constant amplitude fatigue crack growth were performed and it was observed that the growth of the fatigue crack altered the initial residual stress. ",

keywords = "bonded crack retarders, fatigue, GLARE, residual stress, structural composites",

author = "Abdul Syed and Fitzpatrick, {Michael E.} and J.E. Moffatt",

note = "NOTICE: this is the author{\textquoteright}s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures [vol 117 (2014)] DOI: 10.1016/j.compstruct.2014.05.027.",

year = "2014",

month = nov,

doi = "10.1016/j.compstruct.2014.05.027",

language = "English",

volume = "117",

pages = "12--16",

journal = "Composite Structures",

issn = "1879-1085",

publisher = "Elsevier",

}

TY - JOUR

T1 - Evolution of residual stress during fatigue crack growth in an aluminium specimen with a bonded crack retarder

AU - Syed, Abdul

AU - Fitzpatrick, Michael E.

AU - Moffatt, J.E.

N1 - NOTICE: this is the author’s version of a work that was accepted for publication in Composite Structures. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Composite Structures [vol 117 (2014)] DOI: 10.1016/j.compstruct.2014.05.027.

PY - 2014/11

Y1 - 2014/11

N2 - The application of bonded crack retarders in critical aircraft integral structures has been of great interest recently for the improvement of damage tolerance. One potential disadvantage of bonded crack retarders is that the thermal residual stresses which are developed during the strap bonding process are detrimental to the performance of the structure. This investigation explores the distribution of thermal residual stresses developed in an aluminium substrate reinforced with GLARE (glass-fibre-reinforced epoxy) straps and the evolution of stresses during fatigue crack growth. Residual stress measurements were performed using neutron diffraction. The results show that tensile residual stresses are developed in the aluminium substrate as a consequence of the strap bonding process. In situ residual stress measurements during constant amplitude fatigue crack growth were performed and it was observed that the growth of the fatigue crack altered the initial residual stress.

AB - The application of bonded crack retarders in critical aircraft integral structures has been of great interest recently for the improvement of damage tolerance. One potential disadvantage of bonded crack retarders is that the thermal residual stresses which are developed during the strap bonding process are detrimental to the performance of the structure. This investigation explores the distribution of thermal residual stresses developed in an aluminium substrate reinforced with GLARE (glass-fibre-reinforced epoxy) straps and the evolution of stresses during fatigue crack growth. Residual stress measurements were performed using neutron diffraction. The results show that tensile residual stresses are developed in the aluminium substrate as a consequence of the strap bonding process. In situ residual stress measurements during constant amplitude fatigue crack growth were performed and it was observed that the growth of the fatigue crack altered the initial residual stress.

KW - bonded crack retarders

KW - fatigue

KW - GLARE

KW - residual stress

KW - structural composites

U2 - 10.1016/j.compstruct.2014.05.027

DO - 10.1016/j.compstruct.2014.05.027

M3 - Article

SN - 1879-1085

VL - 117

SP - 12

EP - 16

JO - Composite Structures

JF - Composite Structures

ER -

Evolution of residual stress during fatigue crack growth in an aluminium specimen with a bonded crack retarder

Abstract

Bibliographical note

Keywords

Access to Document

Fingerprint

Profiles

Abdul Syed

Cite this