The Experts below are selected from a list of 273 Experts worldwide ranked by ideXlab platform
I. Vardoulakis - One of the best experts on this subject based on the ideXlab platform.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks. © 1994 Springer-Verlag
E. Papamichos - One of the best experts on this subject based on the ideXlab platform.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks. © 1994 Springer-Verlag
J. F. Labuz - One of the best experts on this subject based on the ideXlab platform.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks.
-
A surface instability detection apparatus
Rock Mechanics and Rock Engineering, 1994Co-Authors: E. Papamichos, J. F. Labuz, I. VardoulakisAbstract:A surface instability detection apparatus for investigating Axial Splitting and spalling phenomena in rocks and rock-like materials is described. The apparatus simulates the conditions under which these phenomena occur and allows one to accurately measure them. Experimental results from tests on Berea sandstone are presented where the successive formation of spalling fractures was monitored with an acoustic emission system and the location of the seismic events was mapped. The test results show the potential for benchmark tests in determining the spalling tendency and characteristics of different rocks. © 1994 Springer-Verlag
H.f. Zhang - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Temperature on the Dynamic Mechanical Behaviors of Zr-Based Metallic Glass Reinforced Porous Tungsten Matrix Composite†
Advanced Engineering Materials, 2012Co-Authors: Chen Chen, Yunfei Xue, L. Wang, Fuchi Wang, H.f. Zhang, Xingwang Cheng, Zhengbin Wang, Aiming WangAbstract:The dynamic mechanical behaviors of Zr-based metallic glass reinforced porous tungsten matrix composite were investigated by a split Hopkinson pressure bar at different testing temperatures. The flow stress of the composite decreased, while the ductility increased with increasing testing temperature, which were attributed to that more microcracks were initiated in the tungsten phase as well as more microshear bands were induced in the metallic glass phase with increasing temperature. The failure mode of the composite is a mixture of shearing and Axial Splitting. The flow layer of the metallic glass phase in the shearing fracture surface at 473?K was longer and thinner than that at 223?K.
-
Dynamic compressive deformation and failure behavior of Zr-based metallic glass reinforced porous tungsten composite
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2006Co-Authors: Yunfei Xue, H.n. Cai, L. Wang, Fuchi Wang, H.f. ZhangAbstract:The dynamic compressive deformation and fracture behavior of the Zr-based metallic glass reinforced porous tungsten composite were investigated at room temperature by means of the Split Hopkinson Pressure Bar (SHPB). Both fracture stress and fracture strain increased significantly compared to the pure metallic glass phase. The deformation behavior of the composite was found to be dominated by the ductile W phase and the 3D net structure of the W phase. It was found that the composite appeared to exhibit some work hardening during the dynamic compressive deformation. The failure mode of the specimen is a mixture of one major shear band and Axial Splitting, and the shear plane inclined similar to 56 degrees with respect to the loading axis. Scanning election microscope (SEM) was used to evaluate damage initiation and propagation. It was found that the increase of fracture stress and fracture strain is due to the interaction between localized shear banding and Axial Splitting, promoting additional fracture surface area, and large volume fraction of ductile W phase. The dynamic compressive deformation and fracture behavior of the composite are discussed by taking the effect of the complex stress state within the composite into account. (c) 2006 Elsevier B.V. All rights reserved.
Yunfei Xue - One of the best experts on this subject based on the ideXlab platform.
-
Effect of Temperature on the Dynamic Mechanical Behaviors of Zr-Based Metallic Glass Reinforced Porous Tungsten Matrix Composite†
Advanced Engineering Materials, 2012Co-Authors: Chen Chen, Yunfei Xue, L. Wang, Fuchi Wang, H.f. Zhang, Xingwang Cheng, Zhengbin Wang, Aiming WangAbstract:The dynamic mechanical behaviors of Zr-based metallic glass reinforced porous tungsten matrix composite were investigated by a split Hopkinson pressure bar at different testing temperatures. The flow stress of the composite decreased, while the ductility increased with increasing testing temperature, which were attributed to that more microcracks were initiated in the tungsten phase as well as more microshear bands were induced in the metallic glass phase with increasing temperature. The failure mode of the composite is a mixture of shearing and Axial Splitting. The flow layer of the metallic glass phase in the shearing fracture surface at 473?K was longer and thinner than that at 223?K.
-
Dynamic compressive deformation and failure behavior of Zr-based metallic glass reinforced porous tungsten composite
Materials Science and Engineering A-structural Materials Properties Microstructure and Processing, 2006Co-Authors: Yunfei Xue, H.n. Cai, L. Wang, Fuchi Wang, H.f. ZhangAbstract:The dynamic compressive deformation and fracture behavior of the Zr-based metallic glass reinforced porous tungsten composite were investigated at room temperature by means of the Split Hopkinson Pressure Bar (SHPB). Both fracture stress and fracture strain increased significantly compared to the pure metallic glass phase. The deformation behavior of the composite was found to be dominated by the ductile W phase and the 3D net structure of the W phase. It was found that the composite appeared to exhibit some work hardening during the dynamic compressive deformation. The failure mode of the specimen is a mixture of one major shear band and Axial Splitting, and the shear plane inclined similar to 56 degrees with respect to the loading axis. Scanning election microscope (SEM) was used to evaluate damage initiation and propagation. It was found that the increase of fracture stress and fracture strain is due to the interaction between localized shear banding and Axial Splitting, promoting additional fracture surface area, and large volume fraction of ductile W phase. The dynamic compressive deformation and fracture behavior of the composite are discussed by taking the effect of the complex stress state within the composite into account. (c) 2006 Elsevier B.V. All rights reserved.