Assessment of damage distribution in brittle materials by application of an improved algorithm for three-dimensional localization of acoustic emission sources with P-wave velocity calculation

Autor(es)

Rodriguez, Patricia ^[1] ; Celestino, Tarcisio B. ^{[2, 3]}

Afiliação do(s) autor(es)

^[1] Ferrara Proyectos Especiales, Santiago 7770112 - Chile

^[2] Themag Engn Ltda, Sao Paulo - Brazil

^[3] Univ Sao Paulo, Sao Carlos Engn Sch, Dept Geotech Engn, BR-13566590 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: CONSTRUCTION AND BUILDING MATERIALS; v. 231, JAN 20 2020.
• Citações Web of Science: 0

Resumo

An improved algorithm for acoustic emission source localization with P-wave velocity v(p) calculation and an enhanced methodology for P-wave onset time determination, called CLAPWaVe {[}1], is applied to analyze the distribution of damage within rock specimens under diametral compression. The analyses allowed the identification of four zones of damage accumulation within the specimen volume, each of them with different cracking levels, absolute energy release and associated v(p) values. The observed non-homogeneous damage distribution confirms that using a unique v(p) value for the localization of all AE sources, as usually adopted, is not representative of the real condition of the specimen. (C) 2019 Elsevier Ltd. All rights reserved. (AU)

• Processo FAPESP: 05/57250-2 - Estudo do microfissuramento como mecanismo físico fundamental da fluência em rochas evaporíticas sulfáticas
• Beneficiário: Tarcisio Barreto Celestino
• Modalidade de apoio: Auxílio à Pesquisa - Regular