Loading rate conditions and specimen size effect on strength and deformability of rock materials under uniaxial compression

Komurlu, Eren

doi:10.1186/s40703-018-0085-z

Cited by 26 publications

(6 citation statements)

References 22 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…By conducting numerical simulations, the researchers explored the relationship between these variables. The results indicate that an increase in confining stress leads to a higher peak strength of rocks at failure, which aligns with previous research [29], [30]. Furthermore, the study reveals that the effect of incremental displacement on the ultimate strength of rock diminishes as the displacement increases.…”

Section: Discussionsupporting

confidence: 91%

Numerical simulation of mechanical behavior of rock samples under uniaxial and triaxial compression testsy

Abdellah,

Bader,

Kim

et al. 2023

Min. miner. depos.

View full text Add to dashboard Cite

Purpose. The research aims to investigate how the load influences the ultimate compressive strength of rocks at failure. It uses both a uniaxial compression test, which involves incremental displacements, and a triaxial compression test, which applies varying confining stresses while maintaining a constant axial compression stress and incrementally increasing the displacement. Methods. To conduct the investigation, the researchers used RS2D, a rock-soil software, to examine the impact of different incremental displacements and confining stresses on the strength properties of various rock samples. The numerical analysis includes Fayum argillaceous sand, Sinai coal, Aswan granite, Assiut limestone, and Red-Sea phosphate. Findings. The research findings indicate that the ultimate compressive strength of rocks at failure is achieved with minor incremental displacements. Conversely, an increase in the confining stress leads to higher ultimate tensile strength, deviatoric stresses, and volumetric strain. However, the stress factor decreases in relation to the axial strain percentage. Originality. The simulator adopts Mohr-Coulomb failure criterion, presents and discusses the results in terms of stress-strain (σ-ε) curves, stress ratio (σ1/σ3), deviatoric stresses (σ1-σ3) and volumetric strain with respect to the percentage of axial strain. Practical implications. Using numerical modeling analysis, it becomes possible to reproduce the rock failure mechanisms observed in uniaxial and triaxial compression tests. This methodology has the potential to reduce the need for extensive experimental testing when assessing the tensile strength of rocks under different loads. As a result, both time and costs can be minimized.

show abstract

Section: Discussionsupporting

confidence: 91%

Numerical simulation of mechanical behavior of rock samples under uniaxial and triaxial compression testsy

Abdellah,

Bader,

Kim

et al. 2023

Min. miner. depos.

View full text Add to dashboard Cite

show abstract

“…The thermal strains can make significant damages as it is a well-known property of the brittle cementitious materials (Heidari-Rarani et al, 2014;Khan et al, 2020;Shang and Lu, 2014;Kaya et al, 2016;Keskin et al, 2017). Since the main reason for the increase in the ductility is the improvement in the crack propagation resistivity, it is an estimated result to have an improvement against the repeated strains of thermal cycles with an increase in the ductility (Groeneveld et al 2018;Das et al, 2020;Komurlu, 2018). In a study carried out by Komurlu (2020), the same thermoset polymer additive with that used in this study was investigated to determine its effect on the ductility of the cement grouts and it was reported that the additive notably improves the ductility and the energy absorption capacities of the grout mixes.…”

Section: Discussionmentioning

confidence: 99%

A Resin Type Additive Use to Improve Load Bearing Capacities of Grouted Rock Bolts Exposed to Thermal Cycles

Komurlu

2023

Mühendislik Bilimleri Ve Tasarım Dergisi

View full text Add to dashboard Cite

A thermoset PMS (Polyvinyl modified silicone) type polymer additive effect on load bearing capacities of cement grouted rock bolt specimens exposed to thermal cycles was investigated with a series of experimental studies. The additive used in this study was in liquid phase while adding into the fresh cement mix and started to solidify by polymerization after being mixed well in the cement grout. The silicone based thermoset product was selected to use because of its ability of polymerization in contact with water. According to the results of this study, the load bearing capacity loss due to thermal cycles was found to be notably limited as a result of using the thermoset additive. Therefore, the additive tested in this study was assessed to improve resistivities of the cement grouted rock bolts against the thermal changes.

show abstract

“…Percebeu-se que o aumento da velocidade de carregamento gerou maiores valores de tensão de escoamento e de resistência máxima. Komurlu (2018) avaliou 5 tipos diferentes de rocha, uma pasta de cimento e uma argamassa de cimento e areia quanto a influência da taxa de deformação na resistência à compressão, módulo de elasticidade e fragilidade. O autor observou que os três parâmetros sofreram um aumento com o incremento da velocidade de deformação.…”

Section: Contextualizaçãounclassified

Influência Da Velocidade De Carregamento Nas Resistências À Compressão Não Confinada E À Tração Por Compressão Diametral De Solos Compactados

MARTINS¹,

Rodrigues²,

Silva³

et al. 2020

Congresso Brasileiro De Mecânica Dos Solos E Engenharia Geotécnica

View full text Add to dashboard Cite

Em ensaios de resistência à compressão não confinada a NBR 12770 (ABNT, 1992), referente à compressão não confinada de solos coesivos, estabelece que a velocidade de carregamento esteja compreendida no intervalo de 0,5 a 2 % de deformação axial por minuto; já a NBR 12025 (ABNT, 2012), referente a solo-cimento, estabelece que a velocidade seja de 1 mm/min. Em ensaios de resistência à tração por compressão diametral a norma ME 181 (DNER, 1994) estabelece uma velocidade de 0,5 MPa ± 0,02 MPa. Neste último caso, como nem sempre nos laboratórios estão disponíveis prensas que consigam aplicar tensões controladas, adapta-se uma determinada velocidade para prensas de deformação controlada. Este trabalho buscou realizar a influência da velocidade de aplicação de carga nos ensaios de resistência à compressão não confinada e de resistência à tração por compressão diametral de solos compactados. Para a realização dos ensaios, foram utilizados dois solos provenientes da região do Alto Paraopeba, coletados no município de Jeceaba-MG. Os corpos de prova foram confeccionados no cilindro Proctor, com as dimensões de 12,7 cm de altura e 10 cm de diâmetro, na energia normal. Os ensaios realizados foram os de resistência à compressão não confinada e de resistência à tração por compressão diametral. A ruptura dos corpos de prova foi realizada em uma prensa automática e as velocidades de deslocamento do prato da prensa avaliadas foram de 0,5 mm/min, 0,75 mm/min, 1 mm/min, 2 mm/min e 10 mm/min. Verificou-se que no ensaio de RCNC ambos os solos testados apresentaram um aumento da resistência com o aumento da taxa de deformação. No ensaio de RTCD o solo marrom apresentou aumento da resistência com o aumento da taxa de deformação e o solo vermelho apresentou o comportamento inverso. PALAVRAS-CHAVE: Velocidade de carregamento, solos compactados, Resistência à compressão não confinada, Resistência à tração por compressão diametral.

show abstract

Loading rate conditions and specimen size effect on strength and deformability of rock materials under uniaxial compression

Cited by 26 publications

References 22 publications

Numerical simulation of mechanical behavior of rock samples under uniaxial and triaxial compression testsy

Numerical simulation of mechanical behavior of rock samples under uniaxial and triaxial compression testsy

A Resin Type Additive Use to Improve Load Bearing Capacities of Grouted Rock Bolts Exposed to Thermal Cycles

Influência Da Velocidade De Carregamento Nas Resistências À Compressão Não Confinada E À Tração Por Compressão Diametral De Solos Compactados

Contact Info

Product

Resources

About