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Finite Element Analysis of Laser Peening of Thin Aluminum Structures

1
Air Force Research Laboratory, Wright-Patterson Air Force Base, OH 45066, USA
2
Faculty of Engineering, Environment, and Computing, Coventry University, Coventry CV1 5FB, UK
*
Author to whom correspondence should be addressed.
Metals 2020, 10(1), 93; https://doi.org/10.3390/met10010093
Received: 20 September 2019 / Revised: 21 November 2019 / Accepted: 2 December 2019 / Published: 6 January 2020
(This article belongs to the Special Issue Laser Shock Processing and Related Phenomena)
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.
Keywords: laser peening; residual stress; aluminum alloys laser peening; residual stress; aluminum alloys
MDPI and ACS Style

Langer, K.; Spradlin, T.J.; Fitzpatrick, M.E. Finite Element Analysis of Laser Peening of Thin Aluminum Structures. Metals 2020, 10, 93.

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