Modeling of multi-edge effects in the case of laser shock loadings applied on thin foils : application for material characterization of aluminum alloys

Ayad, Mohammad (author), Trdan, Uroš (author)

This article presents the study of the shock wave propagation through aluminum alloys (pure aluminum and aluminum 2024-T3) produced by laser plasma using experimental and numerical tests. Water confinement regime interaction, pulse duration (7.2 ns), and power density (1–5 GW/cm$^2$) range correspond to laser shock peening process configuration and parameters. To that scope, we simulate the shock wave propagation using non-linear explicit code LS-DYNA, which we validate with experimental results. Thereupon, we present a descriptive analysis that links separately the material model and loading conditions to the dynamic response of aluminum alloys under high strain rate laser shock by coupling the Johnson-Cook (J-C) material model with the Grüneisen equation of state (MAT_015 and EOS_GRUNEISEN accordingly). In addition, we make use of stress propagation into target thickness to analyze the origin of different points on the Back Face Velocity (BFV) profile during shock propagation. Finally, we provide evidence that 2D compressive effects do not depend only on the focal spot size or target thickness such as the edge effects but also on power density and material initial yield strength.

• Language: English
• Keywords: aluminum alloys, laser shock waves, numerical simulation, Johnson-Cook model, equations of state, wave mechanics, alloys, mechanical stress, material characterization methods, laser peening, plasmas, shock waves
• Work type: Article
• Typology: 1.01 - Original Scientific Article
• Organization: FS - Faculty of Mechanical Engineering
• Publication status: Published
• Publication version: Version of Record
• Year: 2022
• Number of pages: 17 str.
• Numbering: Vol. 131, iss. 9, art. 095902
• PID: 20.500.12556/RUL-135511
• UDC: 620.1:669:519.62
• ISSN on article: 0021-8979
• DOI: 10.1063/5.0080326
• COBISS.SI-ID: 101162243
• Publication date in RUL: 17.03.2022

Record is a part of a journal

• Title: Journal of applied physics
• Shortened title: J. appl. phys.
• Publisher: AIP Publishing
• ISSN: 0021-8979
• COBISS.SI-ID: 4730378

Licences

• License: CC BY 4.0, Creative Commons Attribution 4.0 International
• Link: http://creativecommons.org/licenses/by/4.0/
• Description: This is the standard Creative Commons license that gives others maximum freedom to do what they want with the work as long as they credit the author.

Secondary language

• Language: Slovenian
• Keywords: aluminijeve zlitine, laserski udarni valovi, numerične simulacije, Johnson-Cookov model