Towards selective laser paint stripping using shock waves produced by laser-plasma interaction for aeronautical applications on AA 2024 based substrates
Article dans une revue avec comité de lecture
Author
Date
2021Journal
Optics and Laser TechnologyAbstract
Laser stripping is a process which typically includes different forms of ablation phenomena. The presented work investigates a mechanical stripping process using high pressure laser-induced shock waves in a water confined regime. Power density is studied as a parameter for selective laser stripping on painted specimens and for adhesion relations with single layer epoxy targets. A flashlamp-pumped Nd:YAG laser with fixed spot size (4 mm) is shot on single layer epoxy and several layers of polymeric paint applied on a AA 2024-T3 (Aluminium) substrate. After laser treatment, samples are investigated with optical microscopy, profilometer and chemical analysis (FTIR & TGA). The results show that selective laser stripping is possible between different layers of external aircraft coatings and without any visual damage on the substrate material. In parallel to the experimental work, a numerical model has been developed to explain the background of the physical mechanisms and to qualitatively evaluate the detailed stress analysis and interfacial failure simulation for a single layer of epoxy on an aluminium substrate. The predicted failure patterns agree with the surfaces of the tested specimens observed by a microscope.
Files in this item
Related items
Showing items related by title, author, creator and subject.
-
Article dans une revue avec comité de lectureRONDEPIERRE, Alexandre; ÜNALDI, Selen; ROUCHAUSSE, Yann; VIDEAU, Laurent; FABBRO, Rémy; CASAGRANDE, Olivier; SIMON-BOISSON, Christophe; BESAUCÉLE, Hervé; CASTELNAU, Olivier; BERTHE, Laurent (Elsevier, 2021)Processes using laser-shock applications, such as Laser Shock Peening or Laser Stripping require a deep understanding of both mechanical and thermal loading applied. We hereby present new experimental measurements of the ...
-
Article dans une revue avec comité de lectureAYAD, Mohammad; LAPOSTOLLE, Lucas; RONDEPIERRE, Alexandre; BRAS, Corentin Le; ÜNALDI, Selen; DONIK, Črtomir; KLOBČAR, Damjan; BERTHE, Laurent; TRDAN, Uroš (Elsevier, 2022-08)This paper presents an innovative methodology of material characterization under high strain rate (order of 107s��1) laser shock loading coupled with microstructural and mechanical material features. To that scope, ...
-
Article dans une revue avec comité de lectureLE BRAS, Corentin; RONDEPIERRE, Alexandre; SEDDIK, Raoudha; SCIUS-BERTRAND, Marine; ROUCHAUSSE, Yann; VIDEAU, Laurent; GERVAIS, Matthieu; MORIN, Leo; VALADON, Stéphane; ECAULT, Romain; FURFARI, Domenico; BERTHE, Laurent; FAYOLLE, Bruno (MDPI, 2019)This paper presents the first extensive study of the performances of solid polymers used as confinement materials for laser shock applications such as laser shock peening (LSP) as opposed to the exclusively used water-confined ...
-
Article dans une revue avec comité de lectureSCIUS-BERTRAND, Marine; VIDEAU, Laurent; RONDEPIERRE, Alexandre; LESCOUTE, Emilien; ROUCHAUSSE, Yann; KAUFMAN, Jan; ROSTOHAR, Danijela; BRAJER, Jan; BERTHE, Laurent (IOP Publishing, 2021)Optimization of the laser shock peening (LSP) and LASer Adhesion Test (LASAT) processes requires control of the laser-induced target's loading. Improvements to optical and laser technologies allow plasma characterization ...
-
Article dans une revue avec comité de lectureRONDEPIERRE, Alexandre; ROUCHAUSSE, Yann; VIDEAU, Laurent; CASAGRANDE, Olivier; CASTELNAU, Olivier; BERTHE, Laurent (AIP Publishing LLC, 2021-10)The authors present a new configuration for laser-induced plasmas in confined regimes for a 10 ns-range laser pulse in the green wavelength (532 nm) that repulses the breakdown threshold above 20 GW/cm2 compared to 8 GW/cm2 ...