Project Details
Projekt
Laser Shock Propagation Investigation with high-Resolution in Time and Space
Subject Area
Thermodynamics and Kinetics as well as Properties of Phases and Microstructure of Materials
Term
since 2025
Project identifier
Deutsche Forschungsgemeinschaft (DFG) - Project number 568862686
The L-Spirits project aims at providing a fundamental understanding of strong and short shock waves in textured materials. It remains unexplored at the microstructure grain scale while the associated fatigue performances are dramatically related to the grain boundary residual stresses. The project is related to Laser Shock Peening process consisting in reinforcing surfaces by producing compressive residual stresses using laser-plasma generated shock waves. Objectives are (a) Drive technologies as LSP as a disruptive solution, (b) Build a European platform for Laser Shock Peening development, (c) Develop a numerical twin. Scientific issues and challenges addressed by the project are: (i) The full modeling and numerical simulation of shock wave propagation and relaxation in textured materials; (ii) Tracking for the first time at high-spatial and temporal resolutions the shock wave produced by LSP in textured materials. To do so, an important part of the project is dedicated to design and perform in-situ (time and spatially resolved) experiments for investigating high-dynamic processes in engineering materials. (iii) The production of well controlled/characterized textured materials. We will benefit from the recent developments at synchrotron and XFEL facilities. This unprecedented effort will be coupled to upfront micromechanical simulations to predict the shock-wave propagation for different microstructure conditions. It will be the basis for further development of simulation and modeling approaches to establish digital twins for LSP material processing. Project includes 5 work packages: 1. Samples, specifications, manufacturing, material characterization and LSP optimization and treatments; 2. Numerical modeling of the micromechanical behavior; 3. Development of efficient numerical methods: from micro to macroscale. 4. 3D (sub-)microscopic characterisation of materials after LSP treatment (ex-situ measurements); 5. In-situ time-resolved shock wave propagation and residual stress generation. The planned research will be accomplished within the frame of 4 projects shared between French and German partners. L-Spirits gathers among best academic EU groups in the scope of related research on LSP: Helmholtz-Zentrum Hereon, Leuphana University Lüneburg, PIMM & I2M Laboratories. To guide and respond to application challenges, the consortium will rely on a scientific council bringing together researchers from around the world and industrialists.
DFG Programme
Research Grants
International Connection
France
Cooperation Partners
Dr. Laurent Berthe; Professor Dr. Léo Morin
