The Experts below are selected from a list of 60816 Experts worldwide ranked by ideXlab platform
Yuko Okada - One of the best experts on this subject based on the ideXlab platform.
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Experimental and Numerical Study on the Interface Behaviour Between the Rock Bolt and Bond Material
Rock Mechanics and Rock Engineering, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Zhiye Zhao, Yuko OkadaAbstract:Conventional tunnelling methods (i.e., the drill and blast tunnelling method or the new Austrian tunnelling method) have been frequently applied for the construction of tunnels/caverns under a high overburden and with a large cross section. Under such adverse conditions, tunnel support Materials may yield because of ground pressure and tunnel deformation. As a result, a tunnel may lose its stability due to a reduced effectiveness of the tunnel supports. Rock bolts have been widely used as an essential component of tunnel support, and many studies have been conducted on the performance of rock bolts in strengthening the jointed rock mass. However, there is a lack of understanding on the interface behaviour between the rock bolt and the Bond Material, especially the crack initiation and propagation inside the Bond Material. This study aims to investigate the interface behaviour between rock bolts and Bond Materials using laboratory tests (shear tests) and numerical simulations (Discontinuous deformation analysis). By assessing the impact of the key parameters in the rock bolting system, such as the ribs, rib angle, strength of the Bond Material and the confining pressure, we are able to better understand the supporting mechanism and the effects of rock bolting.
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effect of bolt configuration on the interface behaviour between a rock bolt and Bond Material a comprehensive dda investigation
Computers and Geotechnics, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Junlong Shang, Zhiye Zhao, Yuko OkadaAbstract:Abstract The role of rock bolts has become more important for a tunnel/cavern construction because of the wide use of conventional tunnelling methods under severe conditions. However, there is a lack of understanding on the interface behaviour between a rock bolt and Bond Material, especially on the crack initiation and propagation. The purpose of this paper is to investigate the effect of bolt configurations on the bolt-grout interface behaviour by discontinuous deformation analysis. By assessing the impact of key parameters, we can better understand the recommended parameter values and their impacts on the failure mechanism.
Yasuhiro Yokota - One of the best experts on this subject based on the ideXlab platform.
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Experimental and Numerical Study on the Interface Behaviour Between the Rock Bolt and Bond Material
Rock Mechanics and Rock Engineering, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Zhiye Zhao, Yuko OkadaAbstract:Conventional tunnelling methods (i.e., the drill and blast tunnelling method or the new Austrian tunnelling method) have been frequently applied for the construction of tunnels/caverns under a high overburden and with a large cross section. Under such adverse conditions, tunnel support Materials may yield because of ground pressure and tunnel deformation. As a result, a tunnel may lose its stability due to a reduced effectiveness of the tunnel supports. Rock bolts have been widely used as an essential component of tunnel support, and many studies have been conducted on the performance of rock bolts in strengthening the jointed rock mass. However, there is a lack of understanding on the interface behaviour between the rock bolt and the Bond Material, especially the crack initiation and propagation inside the Bond Material. This study aims to investigate the interface behaviour between rock bolts and Bond Materials using laboratory tests (shear tests) and numerical simulations (Discontinuous deformation analysis). By assessing the impact of the key parameters in the rock bolting system, such as the ribs, rib angle, strength of the Bond Material and the confining pressure, we are able to better understand the supporting mechanism and the effects of rock bolting.
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effect of bolt configuration on the interface behaviour between a rock bolt and Bond Material a comprehensive dda investigation
Computers and Geotechnics, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Junlong Shang, Zhiye Zhao, Yuko OkadaAbstract:Abstract The role of rock bolts has become more important for a tunnel/cavern construction because of the wide use of conventional tunnelling methods under severe conditions. However, there is a lack of understanding on the interface behaviour between a rock bolt and Bond Material, especially on the crack initiation and propagation. The purpose of this paper is to investigate the effect of bolt configurations on the bolt-grout interface behaviour by discontinuous deformation analysis. By assessing the impact of key parameters, we can better understand the recommended parameter values and their impacts on the failure mechanism.
Karen Hapgood - One of the best experts on this subject based on the ideXlab platform.
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experimental study of the deformation and breakage of 3d printed agglomerates effects of packing density and inter particle Bond strength
Powder Technology, 2018Co-Authors: Ruihuan Ge, Tina Bonakdar, Zongyan Zhou, Karen Hapgood, Ian Larson, Mojtaba GhadiriAbstract:Characterization of the mechanical properties of agglomerates is important in order to understand their deformation and breakage. However, research progress has been hampered by limitations in our ability to manufacture reproducible agglomerates with well-controlled and fully characterised mechanical properties. In this paper, we report on the preparation and testing of agglomerates with tuneable properties using 3D printing technology. Two typical agglomerate structures with different packing densities were designed and printed using a PolyJet 3D printer. Each agglomerate consisted of rigid primary particles connected by either rigid or rubber-like inter-particle cylindrical Bonds. Compression tests (using speeds in the range 0.02–0.5 mm/s) and drop weight impact tests were carried out to investigate the effect of Bond Material and strain rate on mechanical properties of the agglomerates. The results show that strain rate affects their deformation and breakage significantly, and breakage patterns of the two structures are different under uniaxial compression and impact test conditions. These results demonstrate the broad utility of 3D printed agglomerates as ideal “test” agglomerates for a range of breakage studies, including validating computer simulations of DEM breakage.
Zhiye Zhao - One of the best experts on this subject based on the ideXlab platform.
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Experimental and Numerical Study on the Interface Behaviour Between the Rock Bolt and Bond Material
Rock Mechanics and Rock Engineering, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Zhiye Zhao, Yuko OkadaAbstract:Conventional tunnelling methods (i.e., the drill and blast tunnelling method or the new Austrian tunnelling method) have been frequently applied for the construction of tunnels/caverns under a high overburden and with a large cross section. Under such adverse conditions, tunnel support Materials may yield because of ground pressure and tunnel deformation. As a result, a tunnel may lose its stability due to a reduced effectiveness of the tunnel supports. Rock bolts have been widely used as an essential component of tunnel support, and many studies have been conducted on the performance of rock bolts in strengthening the jointed rock mass. However, there is a lack of understanding on the interface behaviour between the rock bolt and the Bond Material, especially the crack initiation and propagation inside the Bond Material. This study aims to investigate the interface behaviour between rock bolts and Bond Materials using laboratory tests (shear tests) and numerical simulations (Discontinuous deformation analysis). By assessing the impact of the key parameters in the rock bolting system, such as the ribs, rib angle, strength of the Bond Material and the confining pressure, we are able to better understand the supporting mechanism and the effects of rock bolting.
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effect of bolt configuration on the interface behaviour between a rock bolt and Bond Material a comprehensive dda investigation
Computers and Geotechnics, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Junlong Shang, Zhiye Zhao, Yuko OkadaAbstract:Abstract The role of rock bolts has become more important for a tunnel/cavern construction because of the wide use of conventional tunnelling methods under severe conditions. However, there is a lack of understanding on the interface behaviour between a rock bolt and Bond Material, especially on the crack initiation and propagation. The purpose of this paper is to investigate the effect of bolt configurations on the bolt-grout interface behaviour by discontinuous deformation analysis. By assessing the impact of key parameters, we can better understand the recommended parameter values and their impacts on the failure mechanism.
Kensuke Date - One of the best experts on this subject based on the ideXlab platform.
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Experimental and Numerical Study on the Interface Behaviour Between the Rock Bolt and Bond Material
Rock Mechanics and Rock Engineering, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Zhiye Zhao, Yuko OkadaAbstract:Conventional tunnelling methods (i.e., the drill and blast tunnelling method or the new Austrian tunnelling method) have been frequently applied for the construction of tunnels/caverns under a high overburden and with a large cross section. Under such adverse conditions, tunnel support Materials may yield because of ground pressure and tunnel deformation. As a result, a tunnel may lose its stability due to a reduced effectiveness of the tunnel supports. Rock bolts have been widely used as an essential component of tunnel support, and many studies have been conducted on the performance of rock bolts in strengthening the jointed rock mass. However, there is a lack of understanding on the interface behaviour between the rock bolt and the Bond Material, especially the crack initiation and propagation inside the Bond Material. This study aims to investigate the interface behaviour between rock bolts and Bond Materials using laboratory tests (shear tests) and numerical simulations (Discontinuous deformation analysis). By assessing the impact of the key parameters in the rock bolting system, such as the ribs, rib angle, strength of the Bond Material and the confining pressure, we are able to better understand the supporting mechanism and the effects of rock bolting.
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effect of bolt configuration on the interface behaviour between a rock bolt and Bond Material a comprehensive dda investigation
Computers and Geotechnics, 2019Co-Authors: Yasuhiro Yokota, Kensuke Date, Keita Iwano, Junlong Shang, Zhiye Zhao, Yuko OkadaAbstract:Abstract The role of rock bolts has become more important for a tunnel/cavern construction because of the wide use of conventional tunnelling methods under severe conditions. However, there is a lack of understanding on the interface behaviour between a rock bolt and Bond Material, especially on the crack initiation and propagation. The purpose of this paper is to investigate the effect of bolt configurations on the bolt-grout interface behaviour by discontinuous deformation analysis. By assessing the impact of key parameters, we can better understand the recommended parameter values and their impacts on the failure mechanism.