Long-range correlations and natural time series analyses from acoustic emission signals

• Autor(a) principal: Friedrich, Leandro Ferreira
• Data de Publicação: 2022
• Outros Autores: Cezar, Édiblu Silva, Colpo, Angélica Bordin, Tanzi, Boris Nahuel Rojo, Sobczyk Sobrinho, Mario Roland, Lacidogna, Giuseppe, Niccolini, Gianni, Kosteski, Luis Eduardo, Iturrioz, Ignacio
• Tipo de documento: Artigo
• Idioma: eng
• Título da fonte: Repositório Institucional da UFRGS
• Texto Completo: http://hdl.handle.net/10183/237316
• topic: Emissão acústica; Dano estrutural; Acoustic emission; Long-range correlations; Natural time analysis; Heterogeneous materials

This work focuses on analyzing acoustic emission (AE) signals as a means to predict failure in structures. There are two main approaches that are considered: (i) long-range correlation analysis using both the Hurst (H) and the detrended fluctuation analysis (DFA) exponents, and (ii) natural time domain (NT) analysis. These methodologies are applied to the data that were collected from two application examples: a glass fiber-reinforced polymeric plate and a spaghetti bridge model, where both structures were subjected to increasing loads until collapse. A traditional (AE) signal analysis was also performed to reference the study of the other methods. The results indicate that the proposed methods yield reliable indication of failure in the studied structures.