Camacho-Reyes, AlonsoVasco-Olmo, José M.James, M. NeilDíaz, Francisco A.2025-01-082025-01-082022-03-03A. Camacho-Reyes, J.M. Vasco-Olmo, M.N. James, F.A. Díaz. Characterisation of non-planar crack tip displacement fields using a differential geometry approach in combination with 3D digital image correlation. Fatigue and Fracture of Engineering Materials and Structures, 45: 1521–1536, 2022. https://onlinelibrary.wiley.com/doi/full/10.1111/ffe.13686.8756-758X10.1111/ffe.13686https://onlinelibrary.wiley.com/doi/full/10.1111/ffe.13686https://hdl.handle.net/10953/3757T1, Q2 (40/136 Mechanical Engineering; IF 2022 = 3.7)This paper describes a novel differential geometry method that is used in combination with 3D digital image correlation (3D-DIC) for crack tip field characterization on non-planar (curved) surfaces. The proposed approach allows any of the two-dimensional crack tip field models currently available in the literature to be extended to the analysis of a 3D developable surface with zero Gaussian curvature. The method was validated by analyzing the crack tip displacement fields on hollow thin-walled cylindrical specimens, manufactured from either 304L or 2024-T3 alloy that contained a central circumferential crack. The proposed approach was checked via a comparison between experimentally measured displacement fields (3D-DIC) and those reconstructed from a modified 2D crack tip model (utilizing either 2, 3, or 4 terms of the William's expansion series) and implementing a 3D geometrical correction. Further validation was provided by comparing model-derived stress intensity factors with values provided by empirical correlations.engAtribución-NoComercial-SinDerivadas 3.0 Españahttp://creativecommons.org/licenses/by-nc-nd/3.0/es/3D-DICCrack tip fieldcurved circunferencial crackdifferential geometrynon-planar surfaceinfo:eu-repo/semantics/articleinfo:eu-repo/semantics/openAccess