Numerical Investigation of Influence of Spot Geometry in Laser Peen Forming of Thin-Walled Ti-6Al-4V Specimens

Research output: Contributions to collected editions/worksArticle in conference proceedingsResearchpeer-review


The aviation industry demands thin-walled structures of high dimensional accuracy. Varying radii and individual use-cases, e.g. for repair purpose, require flexible forming techniques. Laser peen forming (LPF) represents such a forming process providing precise energy input by a pulsed laser over a wide energy range. Among adjustable parameters such as laser intensity and focus size, the spot shape, i.e. square and circular, is usually fixed for a specific laser system. As the spot shape is a crucial parameter, this work focuses on the effect of the spot shape on structural deformation after LPF application. Therefore, models for laser peen forming of thin-walled Ti-6Al-4V strips for LPF systems with circular and square focus shapes are set up. Geometric conditions on both focus shapes ensure equal energy input during the laser processing. The numerical simulation relies on the so called eigenstrain method, leading to a cost-efficient calculation of resulting deformation after the dynamic LPF process. Square-based peening pattern exhibit higher deflection. For increasing spot size, the deflection difference between square and circle-based patterns increase slightly.

Original languageEnglish
Title of host publicationAchievements and Trends in Material Forming : Peer-reviewed extended papers selected from the 25 th International Conference on Material Forming (ESAFORM 2022)
EditorsGabriela Vincze, Frédéric Barlat
Number of pages10
Place of PublicationBaech
PublisherTrans Tech Publications Ltd
Publication date22.07.2022
ISBN (Print)978-3-0357-1759-4
ISBN (Electronic)978-3-0357-3750-9
Publication statusPublished - 22.07.2022
EventConference - 25th International Conference on Material Forming, ESAFORM 2022 - Altice Forum Braga, Braga, Portugal
Duration: 27.04.202229.04.2022
Conference number: 25

Bibliographical note

The work was carried out within the PEENCOR project funded by the German Federal Ministry of Economics and Technology (BMWi) under the LuFo VI-1 program (project numbers: 20Q1920A, 20Q1920C, 20Q1920D), which is gratefully acknowledged.

Publisher Copyright:
© 2022 The Author(s). Published by Trans Tech Publications Ltd, Switzerland.

    Research areas

  • bending, eigenstrain, Finite element analysis, laser focus, laser peen forming
  • Engineering