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Residual stress in geometric features subjected to laser shock peening

Residual stress in geometric features subjected to laser shock peening
Residual stress in geometric features subjected to laser shock peening
This paper reports selected findings from a collaborative research study into the fundamental understanding of laser shock peening (LSP), when applied to key airframe and aero-engine alloys. The analyses developed include explicit simulations of the peening process together with a simpler eigenstrain approach, which may be used to provide an approximation to the residual stress field in a number of geometries. These are chosen to represent parts of structural components under conditions relevant to service applications. The paper shows that the eigenstrain approach can provide good approximations to the stress field in most circumstances and may provide a computationally efficient tool for exploring different peening strategies. Both explicit and eigenstrain results demonstrate that the interaction between the LSP process and geometric features is important for understanding the subsequent performance of components. Particularly relevant for engineering applications is that not all instances of LSP application may provide an improvement in structural integrity.
eigenstrain, fatigue, laser shock peening, residual stress
0954-4062
1923-1938
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
David, N.
6c041ec4-3211-4288-a40c-d41249a6e4ef
Achintha, M.
8163c322-de6d-4791-bc31-ba054cc0e07d
David, N.
6c041ec4-3211-4288-a40c-d41249a6e4ef

Achintha, M. and David, N. (2015) Residual stress in geometric features subjected to laser shock peening. Proceedings of the Institution of Mechanical Engineers, Part C: Journal of Mechanical Engineering Science, 229 (11), 1923-1938. (doi:10.1177/0954406214550511).

Record type: Article

Abstract

This paper reports selected findings from a collaborative research study into the fundamental understanding of laser shock peening (LSP), when applied to key airframe and aero-engine alloys. The analyses developed include explicit simulations of the peening process together with a simpler eigenstrain approach, which may be used to provide an approximation to the residual stress field in a number of geometries. These are chosen to represent parts of structural components under conditions relevant to service applications. The paper shows that the eigenstrain approach can provide good approximations to the stress field in most circumstances and may provide a computationally efficient tool for exploring different peening strategies. Both explicit and eigenstrain results demonstrate that the interaction between the LSP process and geometric features is important for understanding the subsequent performance of components. Particularly relevant for engineering applications is that not all instances of LSP application may provide an improvement in structural integrity.

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Achintha__Nowell_paper_revised_17Jul2014_2.pdf - Author's Original
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More information

Accepted/In Press date: 14 August 2014
e-pub ahead of print date: 17 September 2014
Published date: August 2015
Keywords: eigenstrain, fatigue, laser shock peening, residual stress
Organisations: Infrastructure Group

Identifiers

Local EPrints ID: 368456
URI: https://eprints.soton.ac.uk/id/eprint/368456
ISSN: 0954-4062
PURE UUID: 6ecb5276-d8d9-433c-9379-7b8401122dd8
ORCID for M. Achintha: ORCID iD orcid.org/0000-0002-1732-3514

Catalogue record

Date deposited: 29 Aug 2014 13:56
Last modified: 20 Jul 2019 00:43

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