Results 61 to 70 of about 4,886,512 (259)

Characterization of the spatial arrangement of opening-mode fractures [PDF]

open access: yes, 2007
textIn spite of the abundance of opening-mode fractures in the earth's upper crust, knowledge about their spatial arrangement remains limited. The spatial arrangement of fractures refers to the patterns of fracture positions in space.
Gómez Torres, Leonel Augusto, 1969-
core  

How do borehole observations characterize crustal stress?

open access: yesDizhi lixue xuebao
Objective  Knowing the in-situ stress state is of great importance for understanding a wide range of geomechanical processes in the Earth’s crust, and for addressing many practical problems in the subsurface.
MA Xiaodong
doaj   +1 more source

Adaptive Foam 3D Printing of Ultralight and Multifunctional Materials

open access: yesAdvanced Engineering Materials, EarlyView.
Adaptive foam 3D printing, enabled by expandable microspheres, imparts cellular structures to thermoplastic and thermosetting polymers, manufactured through a variety of processes including fused filament fabrication, direct ink writing, digital light processing, and inkjet printing.
Nariman Rajabifar, Amir Ameli
wiley   +1 more source

Characterization of natural fractures in Mesaverde core from the multiwell experiment [PDF]

open access: yes, 1988
Natural fractures dominate the permeability of tight sandstone reservoirs in the Mesaverde Formation of the Piceance Creek Basin, north-western Colorado.
Lorenz, J.C., Finley, S.J.
core   +1 more source

Simulation‐Based Analysis of Insert Pull‐Out in Nickel‐Polyurethane Hybrid Foams Using CT‐Derived Geometries

open access: yesAdvanced Engineering Materials, EarlyView.
CT‐based finite element simulations combined with in situ X‐ray computed tomography are used to analyze insert pull‐out in nickel‐coated polymer foams. Despite variations in material parameters, deformation consistently concentrates within a narrow annular region around the insert.
Yannik Bautz   +4 more
wiley   +1 more source

Fabrication Routes for Ionic Conducting Fiber Strain Sensors

open access: yesAdvanced Engineering Materials, EarlyView.
Ionic conducting fiber strain sensors (ICFSs) offer compliant, textile‐integrable sensing. Thus far, the commercialization of ICFSs has been constrained by fiber fabrication routes. This review provides a fabrication‐centric analysis of ICFSs correlating processing strategies with material properties and scalability.
Leo John Kershaw   +3 more
wiley   +1 more source

Research on the impact of pre‐existing geological fractures on hydraulic fracturing in high in situ stress environments

open access: yesEnergy Science & Engineering
The formation of complex fracture network is a difficult problem in the process of deep rock reservoir reconstruction, and the key to the generation of intricate fracture systems in deep reservoirs is to communicate more pre‐existing fractures through ...
Xin Chang   +3 more
doaj   +1 more source

INFLUENCE OF OIL FIELD REEF CARBONATE RESERVOIR PETROPHYSICAL PARAMETERS OF TOURNASIAN-FAMENNIAN DEPOSITS IN UPPER KAMA ON WELL PRODUCTIVITY

open access: yesИзвестия Томского политехнического университета: Инжиниринг георесурсов, 2019
The relevance of the discussed issue is caused by the fact that the majority of carbonate deposits of the Upper Kama region oil deposits confined to reef structures belong to the fissure-pore type reservoirs.
Dmitry A. Martyushev, Roman A. Zaytsev
doaj   +1 more source

Investigating the Low‐Temperature Phase Stability of the Binary Ta–W System

open access: yesAdvanced Engineering Materials, EarlyView.
Atomistic simulations show that the binary Ta–W system forms ordered intermetallic phases, B2‐TaW and D03‐TaW3, as 0 K ground states. Configurational entropy, however, lowers the free energy of the disordered bcc solid solution, which becomes the stable phase above about 400 K.
Klemens Lechner   +7 more
wiley   +1 more source

High‐Entropy Alloy Interlayers Toward Advanced Joining for High‐Performance Structural Applications: Current Progress and Emerging Challenges

open access: yesAdvanced Engineering Materials, EarlyView.
HEA interlayers offer a versatile route for joining high‐performance structural materials. Their compositional and structural design regulates interfacial reactions, suppresses brittle IMCs, and improves metallurgical bonding. Sandwich interlayers further integrate defect healing with precipitation strengthening, enabling improved strength–ductility ...
Lin Yuan   +4 more
wiley   +1 more source

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