Results 1 to 10 of about 1,159,056 (280)

Analysis of Cutting Stability of a Composite Variable-Section Boring Bar with a Large Length-to-Diameter Ratio Considering Internal Damping. [PDF]

Materials (Basel), 2022
Chattering in composite deep-hole boring can directly affect surface processing quality and efficiency and has always been a research hotspot in machining mechanics. In this study, based on Euler–Bernoulli beam theory, the fine control equations for the cutting stability of composite variable-section boring bars were established using the Hamilton ...
Ma J, Xu J, Li L, Liu X, Gao M.
europepmc   +5 more sources

DSMC Simulation of the Effect of Needle Valve Opening Ratio on the Rarefied Gas Flows inside a Micronozzle with a Large Length-to-Diameter Ratio

Aerospace, 2023
The cold gas micro-propulsion system can provide low noise and ultra-high accuracy thrust for satellite platforms for space gravitational wave detection, high-precision earth gravity field measurement.
Xudong Wang, Yong Li, Yong Gao, Chenguang Gao, Weichun Fu   +4 more
doaj   +4 more sources

Improvement of Milling Stable Processing Condition for a Cutter With Large Ratio of Length to Diameter [PDF]

IEEE Access, 2020
In order to machine complex box and shell structures, the cutter with large ratio of length to diameter is usually used, whereas the low rigidity of the cutter hinders the increase of the stable machining parameters.
Yan Xia, Yi Wan, Xichun Luo, Yanan Li, Jinglong Cao, Qinghua Song, Zhanqiang Liu   +6 more
doaj   +4 more sources

Comparative Study of Vortex-Induced Vibration of FRP Composite Risers with Large Length to Diameter Ratio Under Different Environmental Situations [PDF]

Applied Sciences, 2019
The increasing attraction of crude resources on the ocean floor leads to the development of risers, which are an indispensable component of an offshore oil and gas exploitation structure.
Chunguang Wang, Shiquan Ge, Mingyu Sun, Zhirong Jia, Baomin Han   +4 more
doaj   +2 more sources

The Correlations of Clinical Outcomes and Vascular Morphology With Infarct Patterns in Middle Cerebral Arterial Occlusion [PDF]

Brain and Behavior
Objective To compare the clinical outcomes among various infarct patterns and to investigate the associations between the morphological parameters of contralateral middle cerebral artery (cMCA) M1 segment and infarct patterns in ischemic stroke ...
ZhiRong Cai, Yuan Chen, ShaoQing Pei, Yue He, YaNan Zhu, Rui Zhang, JingWei Lin, Yi Yang, Ying Zhu   +8 more
doaj   +2 more sources

Numerical investigation on flow boiling instability in a large length-to-diameter ratio microchannel with reservoir

Case Studies in Thermal Engineering
Flow boiling instability in large length-to-diameter ratio microchannels poses significant challenges for large power and high heat flux dissipation in spacecraft.
Zhen Huang, Jun Xu, Zeng-Yao Li, Hao-Qiang Pang   +3 more
doaj   +2 more sources

Effect of Bend Spacing Configuration on the Vented Explosion Characteristics of Premixed Methane/Hydrogen in Pipelines with a Large Length-to-Diameter Ratio

Fire
Mixing hydrogen into natural gas pipelines for transportation is an effective solution to the imbalance between the supply and demand of hydrogen energy.
Yulin Yang, Jianfeng Gao, Bin Hao, Yanan Han, Xiaojun Shao, Yang Wu, Xiao Wu, Meng Li   +7 more
doaj   +2 more sources

The advanced p-y method for analyzing the behaviour of large-diameter monopiles supporting offshore wind turbines [PDF]

E3S Web of Conferences, 2020
The analyses of monopile foundations have been heavily based on the p-y response curves (to represent lateral soil resistances) published by API RP 2GEO (2011) and DNV (2013), which are proven reliable and applicable for piles with smaller diameters that
Van Impe William F, Wang Shin-Tower
doaj   +1 more source

Direct Simulation Monte Carlo Simulation of the Effect of Needle Valve Structures on the Rarefied Flow of Cold Gas Thrusters

Micromachines, 2023
The needle valve, serving as the flow control unit of the thruster system, is a crucial component of the entire thruster. Its performance directly impacts the flow state of the rarefied gas in the micro-nozzle structure of the cold gas micro-thruster ...
Songcai Lu, Xuhui Liu, Xudong Wang, Shurui Zhang, Yusong Yu, Yong Li   +5 more
doaj   +1 more source

Effects of the Wall Temperature on Rarefied Gas Flows and Heat Transfer in a Micro-Nozzle

Micromachines, 2023
When the satellite is in orbit, the thruster will experience drastic temperature changes (100–1000 K) under solar radiation, which will affect the rarefied gas flow state in the micro-nozzle structure of the cold gas micro-thruster.
Shurui Zhang, Yong Li, Xudong Wang, Songcai Lu, Yusong Yu, Jun Yang   +5 more
doaj   +1 more source