Results 21 to 30 of about 6,031 (262)
机车电传动, 2023 Based on the phase change isothermal technology for deep hole drilling machine, a research methodology involving numerical simulation and experimental testing was applied to optimize the heat transfer design of a heat sink for a rail transit project with
DOU Zechun +5 more
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Jin'gangshi yu moliao moju gongcheng, 2022 Brazed diamond abrasive drill was suitable for drilling holes in carbon fiber reinforced silicon carbide ceramic matrix composites, but a large amount of chips could adversely affect the drilling process of the holes.
Guodong SHAO, Zhenyu SHI
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Nihon Kikai Gakkai ronbunshu, 2015 Near-dry cutting is a key technology to decrease in the usage of cutting fluid. A lot of research achievements revealed that near-dry cutting technology was available, and we hope this technology will contribute to the improvement of the working ...
Koji AKASHI +2 more
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Ultra-Deepwater Riserless Mud Circulation with Dual Gradient Drilling [PDF]
Scientific Drilling, 2008 Drilling deep holes in very deep water presents the offshore drilling community with major wellbore stability challenges that are typically mitigated through the circulation of dense drilling mud to prevent hole collapse and to remove drilling debris ...
Greg Myers
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Introduction to Special Section: The KTB Deep Drill Hole [PDF]
Journal of Geophysical Research: Solid Earth, 1997 When we pose the question “What do we want to know about the Earth?”, the answer is “Everything!” We are demanding, we must be demanding. Our life, and the very survival of our species, depends on our understanding of the Earth. As long as we do not know when earthquakes will happen, when volcanoes will erupt, and how water circulates or energy is ...
Haak, V., Jones, A.
openaire +3 more sources
Advances in Industrial and Manufacturing Engineering, 2023 In deep hole machining operations with twist drills, whirling vibrations lead to a significant increase in hole diameter deviation and circularity error.
Christopher Krebs +5 more
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Spray sealing technology for gas extraction drilling
Gong-kuang zidonghua, 2021 The sealing quality of extraction drilling is the key factor affecting gas extraction and outburst elimination. In order to solve the problems of poor quality of passive hole sealing, low gas concentration in drilling and extraction, and cumbersome ...
KONG Weiyi1 +3 more
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Journal of Materials Research and TechnologyMicro holes with high aspect ratios are essential for the cooling performance of aero-engines. Challenges persist in deep hole drilling due to the escalating stringent requirements in terms of hole diameters, aspect ratios, and 3D profiles. In this study,
Nan Zhang +4 more
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Phase Field Failure Modeling: Brittle‐Ductile Dual‐Phase Microstructures under Compressive Loading
Advanced Engineering Materials, EarlyView.The approach by Amor and the approach by Miehe and Zhang for asymmetric damage behavior in the phase field method for fracture are compared regarding their fitness for microcrack‐based failure modeling. The comparison is performed for the case of a dual‐phase microstructure with a brittle and a ductile constituent.
Jakob Huber, Jan Torgersen, Ewald Werner
wiley +1 more source
IEEE Access, 2019 Titanium alloy (Ti) has been widely used in aerospace industry due to excellent mechanical properties and the demands of Ti parts with a high length-to-diameter ratio and a large diameter are increasing.
Zhenyu Shao +6 more
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