Results 101 to 110 of about 26,973 (231)

Study on the Law of Multi‐Fracture Propagation in Different Fracturing Fluid Viscosity

Energy Science &Engineering, EarlyView.
Samples and equipment Sample preparation Test equipment Analysis of test results Fracture propagation morphology Influence of fracturing fluid viscosity on crack initiation time/(fracture initiation pressure) Evolution law of injection pressure Cumulative relation curve of pressure–time–acoustic ABSTRACT Using the TCHFSM‐I large‐scale accurate triaxial
Zhixing Zhang, Xiang Fu, Yuedong Liu, Xiaoqiang Zhang, Yulong Jiang   +4 more
wiley   +1 more source

Stellar Streams as Probes of Dark Halo Mass and Morphology: A Bayesian Reconstruction

, 2011
Tidal streams provide a powerful tool by means of which the matter distribution of the dark matter halos of their host galaxies can be studied. However, the analysis is not straightforward because streams do not delineate orbits, and for most streams ...
A. Varghese, Allgood, Bailin, Belokurov, Bett, Binney, Bullock, Carlberg, Combes, Conn, Conn, Conn, Debattista, Dehnen, Dehnen, Dehnen, Dubinski, Dubinski, Dubinski, Eyre, Eyre, Frenk, G. F. Lewis, Gregory, Grillmair, Grillmair, Helmi, Hoekstra, Ibata, Ibata, Ibata, Iodice, Jing, Kazantzidis, Koposov, Kuijken, Law, Law, Mackey, Majewski, Mandelbaum, Martínez-Delgado, Martínez-Delgado, Martínez-Delgado, Mayer, McConnachie, Merrifield, Mouhcine, Navarro, Newberg, Odenkirchen, Odenkirchen, Olling, O’Brien, O’Brien, O’Brien, O’Brien, Pfenniger, R. Ibata, Read, Sackett, Sackett, Springel, Teuben, White   +64 more
core   +1 more source

Unified anisotropic elastoplastic model for sand [PDF]

, 2016
This paper presents a unified approach to model the influence of fabric anisotropy and its evolution on both the elastic and plastic responses of sand.
Gao, Zhiwei, Zhao, Jidong
core   +4 more sources

Research on Precise Identification of Rock Strength Based on Bolt Drilling Parameters

Energy Science &Engineering, EarlyView.
Drilling detection test platform. ABSTRACT During roadway excavation, the presence of weak interlayers and fractured rock masses significantly affects roof stability. To achieve timely and effective roadway support, it is crucial to identify and predict different rock types based on drilling signals from roof bolters.
Qiang Zhu, Sheng Biao Wang, Da Jiang Wen, Chong‐Yu Song, Kang Zhou   +4 more
wiley   +1 more source

Failure properties of rocks in true triaxial unloading compressive test

Transactions of Nonferrous Metals Society of China, 2015
Slabbing failure often occurs in the surround rock near a deep underground excavation. The mechanism of slabbing failure is still unclear. In order to reveal the influence of the intermediate principal stress (σ2) on slabbing failure, true triaxial unloading compressive test was carried out based on the stress path of the underground engineering ...
Kun DU, Xi-bing LI, Di-yuan LI, Lei WENG
openaire   +1 more source

A new smooth failure criterion for concrete inspired by Lubliner's condition

Structural Concrete, EarlyView.
Abstract A new failure criterion with 10 parameters is proposed, based on Lubliner's idea of joining two Drucker–Prager cones. The novelty lies in the way of introducing deviatoric shape variation: through two Podgórski's functions. This feature allows for improving plane stress cross‐section's compatibility with experimental data.
Inez Kamińska, Aleksander Szwed
wiley   +1 more source

Microdynamic mechanical properties and fracture evolution mechanism of monzogabbro with a true triaxial multilevel disturbance method

International Journal of Mining Science and Technology
The far-field microdynamic disturbance caused by the excavation of deep mineral resources and underground engineering can induce surrounding rock damage in high-stress conditions and even lead to disasters.
Zhi Zheng, Bin Deng, Hong Liu, Wei Wang, Shuling Huang, Shaojun Li   +5 more
doaj   +1 more source

Computational Investigation on the Combined Effect of Applied Strain and Pore Configuration on Strain Concentrators in Additively Manufactured Metals

Fatigue &Fracture of Engineering Materials &Structures, EarlyView.
ABSTRACT Metal additive manufacturing (AM) provides a pathway for creating highly optimized components that would be difficult to produce using traditional manufacturing methods. However, regardless of printing parameters or postprocessing, porosity remains a prevalent challenge in AM components because strain concentrates in the vicinity of the pore ...
Erick Adan Ramirez, Saikumar Reddy Yeratapally, George Robert Weber, Kenji Shimada   +3 more
wiley   +1 more source

Development of a Computer Vision-Based Three-Dimensional Reconstruction Method for Volume-Change Measurement of Unsaturated Soils during Triaxial Testing [PDF]

, 2019
Problems associated with unsaturated soils are ubiquitous in the U.S., where expansive and collapsible soils are some of the most widely distributed and costly geologic hazards.
Xia, Xiaolong, Zhang, Xiong
core  

Ellipsoidal halo finders and implications for models of triaxial halo formation

, 2013
We describe an algorithm for identifying ellipsoidal haloes in numerical simulations, and quantify how the resulting estimates of halo mass and shape differ with respect to spherical halo finders.
Despali, Giulia, Sheth, Ravi K., Tormen, Giuseppe   +2 more
core   +1 more source