PSI - Issue 72

Available online at www.sciencedirect.com

ScienceDirect

Procedia Structural Integrity 72 (2025) 135–140

12th Annual Conference of Society for Structural Integrity and Life (DIVK12) Numerical investigation of residual stress field induced by laser shock peening Mariia Bartolomei a, *, Anastasia Iziumova a , Aleksey Vshivkov a , Elena Gachegova a , Oleg Plekhov a a Institute of Continuous Media Mechanics of the Ural Branch of Russian Academy of Science (ICMM UB RAS), Korolyova str. 1, Perm, 614068, Russia Abstract Laser shock peening (LSP) allows to improve fatigue characteristics and strength properties of metals and metal alloy products. In this work, numerical modeling of the process of residual stress fields formation as a result of laser shock peening is realized. For modeling the propagation of elastoplastic waves, Johnson-Cook constitutive relations were used. The purpose of the work was to identify such a processing mode, which not only forms a residual stress field with the necessary characteristics (depth, maximum value of compressive residual stresses), but also observed a real improvement in fatigue properties after LSP for samples under different patterns of the treatment. The main criterion for the efficiency of the laser shock treatment pattern was the specimen life that means the number of cycles to failure during fatigue testing of the specimen after LSP at a constant value of stress ratio. According to the results of numerical modeling we could build distribution of residual stress field and determine the effective value of load for the treated samples. © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia

Keywords: Laser shock peening; residual stress; finite element modeling; titanium alloy

1. Introduction Laser shock peening (LSP) allows one to significantly improve fatigue characteristics and strength properties of metal and metal alloy products. The technology is based on the effect described in the 1960s, Askaryan et al. (1962)

* Corresponding author. Tel.: +351939526892; fax: +351228321159. E-mail address: bartolomei.m@icmm.ru

2452-3216 © 2026 The Authors. Published by ELSEVIER B.V. This is an open access article under the CC BY-NC-ND license (https://creativecommons.org/licenses/by-nc-nd/4.0) Peer-review under responsibility of Aleksandar Sedmak, Branislav Djordjevic, Simon Sedmak Dr. Simon Sedmak, ssedmak@mas.bg.ac.rs, Innovation Center of Faculty of Mechanical Engineering, Belgrade, Serbia 10.1016/j.prostr.2025.08.084