Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Evolution of Natural Joints' Mesoscopic Failure Modes under Shear Tests: Acoustic Emission Investigation
Natural joints play an important role in the stability performance of rock engineering. To deeply understand the shear mechanism of natural joints (i.e., tensile fracture or shear fracture), direct shear experiments and acoustic emission (AE) monitoring were carried out for different kinds of joints under five levels of normal stress. By disposing the AE signals during a joint's shear process as AE samples databases, an optimal criterion to identify the tensile fracture and shear fracture modes was established based on the AE parameters, and this method was applied to reveal the shear damage of natural joints under the shear process. The results showed that the shear failure regions of natural joints were localized and inhomogeneous on a joint's surface, and the mesoscopic shear fracture and tensile fracture appeared along all the shearing process of the joint. The moment and the type of failure mode changed with the increase of the normal stress, but the main type of fracture did not change in each period during the whole shearing process, which provided a new way for disaster warning of shear damage.
Evolution of Natural Joints' Mesoscopic Failure Modes under Shear Tests: Acoustic Emission Investigation
Natural joints play an important role in the stability performance of rock engineering. To deeply understand the shear mechanism of natural joints (i.e., tensile fracture or shear fracture), direct shear experiments and acoustic emission (AE) monitoring were carried out for different kinds of joints under five levels of normal stress. By disposing the AE signals during a joint's shear process as AE samples databases, an optimal criterion to identify the tensile fracture and shear fracture modes was established based on the AE parameters, and this method was applied to reveal the shear damage of natural joints under the shear process. The results showed that the shear failure regions of natural joints were localized and inhomogeneous on a joint's surface, and the mesoscopic shear fracture and tensile fracture appeared along all the shearing process of the joint. The moment and the type of failure mode changed with the increase of the normal stress, but the main type of fracture did not change in each period during the whole shearing process, which provided a new way for disaster warning of shear damage.
Evolution of Natural Joints' Mesoscopic Failure Modes under Shear Tests: Acoustic Emission Investigation
Jiang, Quan (Autor:in) / Liu, Chang (Autor:in) / Feng, Guang-Liang (Autor:in) / Yang, Yao (Autor:in) / Zheng, Hong (Autor:in) / Du, Chengbo (Autor:in)
26.08.2021
Aufsatz (Zeitschrift)
Elektronische Ressource
Unbekannt
Shear Failure of Bolted Joints considering Mesoscopic Deformation Characteristics of Rock
| DOAJ | 2020
Mesoscopic numerical simulation of acoustic emission experiments in rock failure
| British Library Conference Proceedings | 2010
Ferrocement bolted shear joints: Failure modes and strength prediction
| Online Contents | 1998