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Numerical analysis of the influence of sample stiffness and plate shape in the Brazilian test

Álvarez Fernández, Martina Inmaculada and González Nicieza, Celestino and Prendes Gero, Maria Belén and García-Menéndez, José Ramón and Peñas Espinosa, Juan Carlos and Suarez Dominguez, Francisco José (2015) Numerical analysis of the influence of sample stiffness and plate shape in the Brazilian test. DYNA, 82 (194). pp. 79-85. ISSN 2346-2183

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Due to the heterogeneity of rocks, their tensile strength is around 10% of their compressive strength, which means that breakage is mainly caused by tensile stress. The measure of tensile stress is very difficult due to rock fragility, so it has usually been measured by indirect measurement methods , including the Brazilian test. However, recent works indicate that the tensile strength values obtained through the Brazilian test must be increased by almost 26%. To understand this divergence, indirect tensile tests have been monitored. The aim is to know the material deformation and load increase by means of stepwise regression. Stress fields in slightly deformed samples are analyzed and modeled (3D finite differences) with loads applied on flat and curved plates and different Young's modulus. Finally, the results are analyzed and compared with strength values reported using Timoshenko theory and Hondros' approximation.

Tipo de documento:Artículo - Article
Palabras clave:Brazilian test, test monitoring, numerical simulation.
Temática:6 Tecnología (ciencias aplicadas) / Technology > 62 Ingeniería y operaciones afines / Engineering
Unidad administrativa:Revistas electrónicas UN > Dyna
Código ID:58948
Enviado por : Dirección Nacional de Bibliotecas STECNICO
Enviado el día :31 Oct 2017 17:20
Ultima modificación:27 Noviembre 2017 22:05
Ultima modificación:27 Noviembre 2017 22:05
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