On the experimental characterisation of crack tip displacement fields on nonplanar elements: Numerical and experimental analysis

• Published in: Theoretical and applied fracture mechanics Vol. 124; p. 103803
• Main Authors: Camacho-Reyes, A., Antunes, F.V., Vasco-Olmo, J.M., Diaz, F.A., Felipe-Sesé, L.A.
• Format: Journal Article
• Language: English
• Published: Elsevier Ltd 01.04.2023
• Subjects: 3D-DIC; AISI 304L; Crack tip field; Curved circumferential crack; FEA; Non-planar surface; Crack tip field; AISI 304L; 3D-DIC; FEA; Curved circumferential crack; Non-planar surface
• ISSN: 0167-8442; 1872-7638
• DOI: 10.1016/j.tafmec.2023.103803

•Characterisation of crack tip fields in non-planar cracked elements.•Image Decomposition technique applied to compare FEA and DIC crack tip data.•High accuracy approach for SIFs determination on non-flat cracked surfaces. In this work, a numerical and experimental study about crack tip fields characterisation on curve-cracked elements has been performed. This study combines a novel differential geometry approach combined with 3D-DIC and FEA results to determine crack-tip parameters from the displacement field on a curved cracked element. The work aims to validate and compare some aspects that cannot be addressed using 3D-DIC. SIFs for different crack lengths are determined using DIC and FEA data and compared In addition, a comprehensive comparison between experimental and numerical fields is done using an Image Decomposition technique based on Tchebichef polynomials.