Results 41 to 50 of about 485 (190)

Key Technical Fields and Future Outlooks of Space Manipulators: A Survey

SmartBot, EarlyView.
This paper systematically reviews the technological development of space manipulators, emphasizing the unique challenges posed by space environments. It examines four areas: structural design, modeling, planning, and control, while introducing typical ground test platforms.
Gang Chen, Zeyuan Huang, Ying Yan, Xiaokang An, Zhikai Zhao, Jirong Lin, Xiangrong Zhao, Xianyuan Gao, Junyi Zong, Xuewen Jia, Zhipeng Yao, Jianliang Liao, Ning Ji   +12 more
wiley   +1 more source

Tailoring Microstructure and Hardness in Maraging 300 Steel via 2.4 wt.% Niobium Addition and Controlled Aging Treatments

steel research international, EarlyView.
High Nb (2.4 wt.%) addition to Maraging 300 steel drives lattice distortion and nanoscale Nb–Mo‐rich precipitation, confirmed by energy‐dispersive X‐ray spectroscopy mapping (Mo ~5.4 wt.%, Nb ~2.5 wt.%). Nanoindentation reveals strong matrix hardening (H >4.8 GPa) at 480°C aging, while 560°C induces ~1.92 vol.% reverted austenite, enabling tunable ...
Laylla Sharon B. Peixoto, Mohammad Masoumi, Luís Henrique N. de Lima, Marcos Natan da Silva Lima, Luis Flávio Gaspar Herculano, Isabel Ferreira de Barros, Geronimo Perez, Maria Vittoria Moraschini Reis, Hamilton Ferreira Gome Abreu, Marcelo J. Gomes da Silva   +9 more
wiley   +1 more source

调质钢齿轮接触疲劳寿命试验最佳分布类型的分析

Jixie chuandong, 1999
The optimum distributions and the probable distributions of the 3 varibles （life, strength and stress） of through hardened gears were obtained based on the experimental results of 60 pairs of gears made of through hardened steel, which would provide a ...
李艳, 张祖明
doaj  

Damage Investigation of the Preform Operations for the Production of Rings for Ring Rolling

steel research international, EarlyView.
Void evolution during the preforming operations of two industrial ring rolling process routes is investigated by combining metallographic characterization with a two‐scale finite element simulation approach. The results reveal that, despite differing initial void conditions, the preforming operations can be designed to effectively influence void ...
Laurenz Kluge, Johannes Weninger, André Hundertmark, Bastian Kettler, Heiko Manz, David Bailly, Junhe Lian   +6 more
wiley   +1 more source

Review on Tooth Flank Fracture Failure of Hardened Gears

Jixie chuandong, 2022
There is a new tooth failure mode for hardened gears called tooth flank fracture(TFF). ISO published a technical specification for calculating the load capacity of tooth flank failure in 2019.
Zhigang Cao, Jingyuan Wang, Yongfei Yang, Yufeng Li, Na'na Li, Xiaopeng Wang, Shijun Liu   +6 more
doaj  

AGRICULTURE IN A SOCIALIST CITY: Towards an Alter‐Urban Political Ecology

International Journal of Urban and Regional Research, EarlyView.
Abstract Urban political ecology has developed as a critique of capitalist urbanization. This article develops the concept of alter‐urban political ecology to define urban environments emerging not from capitalist urbanization but from efforts to transform it. Drawing on archival research and ethnographic fieldwork in five urban farms in socialist Cuba,
Gustav Cederlöf
wiley   +1 more source

Incremental Shifts, Strategic Orbits: The Evolution of EU Space Policy Through Gradual Security Linkages

Global Policy, EarlyView.
ABSTRACT This article examines the evolution of European Union (EU) space policy through the lens of historical institutionalism, highlighting how security and defence considerations have been incrementally integrated into a domain originally framed as civilian and scientific.
Gustavo G. Müller, Philip De Man
wiley   +1 more source

Modulating Hunting Atmospheres: Mud and Material Flows Beyond the Kill

American Anthropologist, EarlyView.
ABSTRACT This article argues that hunting is not a bounded event but a materially redistributed atmosphere that extends beyond the kill and across field, truck, clothing, and home. Drawing on long‐term ethnographic fieldwork with wild boar hunters in Uruguay, I show how mud, odors, blood, and bodily residues carry the sensory, affective, and material ...
Juan Martin Dabezies
wiley   +1 more source

Finish machining of hardened gears wheels using cubic boron nitride (CBN) inserts

Metalurgija, 2012
The paper presents some results of investigation of finish machining of hardened bearing surfaces of cylindrical gear wheels. Finish machining has been performed with wedges of defined geometry made of CBN. The presented investigation results are related
R. Talar, A. Stoić
doaj  

Scientific Basis for the Substantiation of Process Regulations for the Micro-Cutting of Hardened Gears

Journal of Mechanical Engineering, 2023
The paper considers scientific principles of technological procedure development for the selection and assignment of parameters of velocity machining by blade tool at gear milling with due regard to the required parameters of the gear surface layer ...
Klochko Alexander, Basova Yevheniia, Gasanov Magomediemin, Zakovorotny Alexander, Fedorenko Vitaly, Myronenko Oleh, Vorontsov Borys, Ryazantsev Anton, Protasov Roman   +8 more
doaj   +1 more source