Multiscale Optical Methods to Measure the Fatigue Crack Closure

• Tipo: Artigo em Livro de Atas de Conferência Internacional
• Data: 2024

Autores

Farahani, V (Autor) Outra; Direito, F (Autor) Outra; Sousa, J (Autor) FEUP; Tavares, J (Autor) Outra; Moreira, P (Autor) Outra

Ata de Conferência Internacional

Título: Procedia Structural Integrity

Páginas: 638-644

5th International Conference on Structural Integrity, ICSI 2023

Funchal, 29 August 2023 through 1 September 2023

Indexação

Scopus - 0 Citações

Outras Informações

ID Authenticus: P-010-62A

DOI: 10.1016/j.prostr.2024.01.129

Abstract (EN): In this work, two different high-resolution optical tools are used to measure in-plane displacements on the crack flanks close to the crack tip, which can then be used to determine the presence of crack closure in propagating fatigue cracks. Middle tension (MT) AA6082-T6 aluminum alloy specimens were used with an initial notch, submitted to a cyclic fatigue-loading to open the crack with a pre-determined length. Then, the cracked specimen is monotonically loaded, with defined load increments, to reach the peak load. Digital Image Correlation (DIC) and Electronic Speckle Pattern Interferometry (ESPI) are employed to collect the experimental data at different resolution, calculating the displacement and deformation fields while the specimen is statically loaded. The force-displacement variation on the vertical virtual gauges defined on the crack flanks adjacent to the crack tip is also meticulously monitored. Results from both techniques are compared, and a complementary multiscale methodology is proposed for the crack closure phenomenon. © 2023 The Authors. Published by Elsevier B.V.

Idioma: Inglês

Tipo (Avaliação Docente): Científica

Nº de páginas: 6