Results 31 to 40 of about 7,165 (303)

Microstructural Evolution and Vacancy Defect Formation in Mn–Mo–Ni RPV Steel Under Low Cycle Fatigue: Insights From EBSD and PALS

open access: yesAdvanced Engineering Materials, EarlyView.
Low‐cycle fatigue damage in Mn–Mo–Ni reactor pressure vessel steel is examined using a combined electron backscatter diffraction and positron annihilation lifetime spectroscopy approach. The study correlates texture evolution, dislocation substructure development, and vacancy‐type defect formation across uniform, necked, and fracture regions, providing
Apu Sarkar   +2 more
wiley   +1 more source

Distribuição volumétrica de pontas de pulverização Turbo Teejet 11002 em diferentes condições operacionais Distribution pattern of nozzle TT 11002 under different operational conditions

open access: yesPlanta Daninha, 2005
Este trabalho teve como objetivo determinar a uniformidade de distribuição para a ponta de pulverização TT 11002 em função de espaçamento entre bicos, altura de barra e pressão de trabalho, bem como avaliar a possibilidade de redução do volume de calda ...
F.C.L. Freitas   +5 more
doaj   +1 more source

Near‐Field Electrospinning Micro‐Printhead Achieves Precise Control of Nanofiber Deposition

open access: yesAdvanced Engineering Materials, EarlyView.
A micro‐printhead for near‐field electrospinning enables reproducible deposition of polymer nanofibers with diameters below 50 nm. Systematic parameter studies uncover the mechanisms linking operating conditions to fiber morphology, paving the way for precise and low‐cost nanoscale 3D manufacturing.As a high‐resolution, cost‐effective, and rapid ...
Han Xu, Dario Mager, Jan G. Korvink
wiley   +1 more source

Structure and arrangement optimization of non-diagenetic gas hydrate jet crushing nozzles based on CFD simulation

open access: yesJournal of Engineering and Applied Science, 2022
To optimize the optimal nozzle structure and multiple nozzle arrangement for hydrate jet crushing and to promote the development of solid fluidization extraction technology for shallow unconformity hydrate in China’s oceans, the submerged jet flow field ...
Xiaoyu Fang   +4 more
doaj   +1 more source

Ultrasound directed self-assembly of filler in continuous flow of a viscous medium through an extruder nozzle for additive manufacturing

open access: yesAdditive Manufacturing Letters, 2023
We use ultrasound directed self-assembly (DSA) to organize filler dispersed in a viscous medium into concentric circle patterns during continuous flow through an extruder nozzle for additive manufacturing.
Alan Felt, Bart Raeymaekers
doaj   +1 more source

Additive Manufacturing of Continuous Fibre Reinforced Composites: Process, Characterisation, Modelling, and Sustainability

open access: yesAdvanced Engineering Materials, EarlyView.
Additive manufacturing provides precise control over the placement of continuous fibres within polymer matrices, enabling customised mechanical performance in composite components. This article explores processing strategies, mechanical testing, and modelling approaches for additive manufactured continuous fibre‐reinforced composites.
Cherian Thomas, Amir Hosein Sakhaei
wiley   +1 more source

Experimental study on the hydraulic performance of impact-sprinkler system using aquaculture water for irrigation

open access: yesGuan'gai paishui xuebao
【Background】 Sprinkler irrigation is a widely used technique across various sectors. This study examines the impact of using aquaculture water for irrigation on the hydraulic performance of the 20PY2H impact sprinkler systems.
JIANG Yue   +3 more
doaj   +1 more source

Understanding the Stochastic Nature of Process Parameter Development of Blown Powder Laser Beam Directed Energy Deposition Additive Manufacturing of Pure Molybdenum

open access: yesAdvanced Engineering Materials, EarlyView.
Identified through the use of statistical design of experiments and metallographic investigation, this study exposes the stochastic origins of intergranular cracks in blown powder laser beam directed energy deposition additive manufacturing of pure molybdenum. It further demonstrates a successful crack mitigation approach with direct correlation to the
Nathaniel J. Lies   +2 more
wiley   +1 more source

Study on Optimization of Key Parameters for High-Pressure Water Jet Reaming Equipment of Anchor Holes in Soft Rock Roadways

open access: yesApplied Sciences
To solve the problems of easy fracture of reaming cutter arms and mechanical jamming leading to equipment damage when mechanical reaming equipment is used for anchor hole reaming in soft rock roadways, this study proposes the development of a high ...
Aolong Liu, Hua Nan, Yida Sun
doaj   +1 more source

Dual-bell nozzle with fluidic control of transition for space launchers

open access: yesActa Astronautica, 2022
The dual-bell nozzle is a promising concept for improving the performance of space launchers. It is characterised by the presence of two altitude-dependent working modes which allow to reduce non-adaptation losses. However, the transition between the two working modes usually takes place prematurely and dangerous side loads might be observed.
Andrea Ferrero   +4 more
openaire   +3 more sources

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