Finite Element Analysis of Laser Peening of Thin Aluminum Structures

Kristina Langer; T. Spradlin; Michael Fitzpatrick

doi:10.3390/met10010093

Finite Element Analysis of Laser Peening of Thin Aluminum Structures

Kristina Langer, T. Spradlin, Michael Fitzpatrick

College of Engineering, Environment & Science

Wright-Patterson Air Force Base

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

21 Citations (Scopus)

85 Downloads (Pure)

Abstract

Laser shock peening has become a commonly applied industrial surface treatment, particularly for high-strength steel and titanium components. Effective application to aluminum alloys, especially in the thin sections common in aerospace structures, has proved more challenging. Previous work has shown that some peening conditions can introduce at-surface tensile residual stress in thin Al sections. In this study, we employ finite element modeling to identify the conditions that cause this to occur, and show how these adverse effects can be mitigated through selection of peen parameters and patterning.

Original language	English
Article number	93
Number of pages	16
Journal	Metals
Volume	10
Issue number	1
DOIs	https://doi.org/10.3390/met10010093
Publication status	Published - 6 Jan 2020

Bibliographical note

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Funder

This research study was sponsored by the Air Force Office of Scientific Research, Air Force Material Command, USAF, under grant number FA8655-12-1-2084, and the Air Force Research Laboratory’s Aerospace Systems Directorate.

Keywords

Aluminum alloys
Laser peening
Residual stress

ASJC Scopus subject areas

Materials Science(all)

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10.3390/met10010093Licence: CC BY

PublishedFinal published version, 2.64 MBLicence: CC BY

Cite this

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AU - Langer, Kristina

AU - Spradlin, T.

AU - Fitzpatrick, Michael

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PY - 2020/1/6

Y1 - 2020/1/6

N2 - Laser shock peening has become a commonly applied industrial surface treatment, particularly for high-strength steel and titanium components. Effective application to aluminum alloys, especially in the thin sections common in aerospace structures, has proved more challenging. Previous work has shown that some peening conditions can introduce at-surface tensile residual stress in thin Al sections. In this study, we employ finite element modeling to identify the conditions that cause this to occur, and show how these adverse effects can be mitigated through selection of peen parameters and patterning.

AB - Laser shock peening has become a commonly applied industrial surface treatment, particularly for high-strength steel and titanium components. Effective application to aluminum alloys, especially in the thin sections common in aerospace structures, has proved more challenging. Previous work has shown that some peening conditions can introduce at-surface tensile residual stress in thin Al sections. In this study, we employ finite element modeling to identify the conditions that cause this to occur, and show how these adverse effects can be mitigated through selection of peen parameters and patterning.

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KW - Laser peening

KW - Residual stress

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Finite Element Analysis of Laser Peening of Thin Aluminum Structures

Abstract

Bibliographical note

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Keywords

ASJC Scopus subject areas

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