Results 101 to 110 of about 24,455,711 (308)

Thermodynamic Pathways of Nonequilibrium Solidification in Wire‐Arc Additive Manufacturing Fe‐Based Multicomponent Alloy Structures

open access: yesAdvanced Engineering Materials, EarlyView.
Geometry‐driven thermal behavior in wire‐arc additive manufacturing (WAAM) influences microstructural evolution during nonequilibrium solidification of a chemically complex Fe–Cr–Nb–W–Mo–C nanocomposite system. By comparing different deposits configurations, distinct entropy–cooling rate correlations, segregation, and carbide evolution are revealed ...
Blanca Palacios   +5 more
wiley   +1 more source

Thermomechanical Fatigue and Creep–Fatigue Interaction of Inconel 718 Additively Manufactured by Laser Beam Powder Bed Fusion

open access: yesAdvanced Engineering Materials, EarlyView.
Thermomechanical fatigue tests of laser beam powder bed fusion (PBF‐LB) Inconel 718 show that the additively manufactured material reaches almost the lifetimes of conventionally‐rolled material under no‐dwell conditions. Introducing dwell times at the maximum temperature markedly reduces the lifetimes due to pronounced grain boundary sliding associated
Stefan Guth   +6 more
wiley   +1 more source

Analysis and suppression of high-frequency oscillation in wind farm-MMC-HVDC interconnected system considering distribution characteristics of submarine cables

open access: yesInternational Journal of Electrical Power & Energy Systems
With the large-scale development of offshore wind power, modular multilevel converter-based high-voltage direct current (MMC-HVDC) has emerged as a pivotal grid integration solution, yet it is constrained by high-frequency oscillation issues in power ...
Yanxu Wang   +5 more
doaj   +1 more source

Air‐Pressure–Actuated Vibroacoustic Metamaterial With Tunable Bandgap: Design, Modeling, and Characterization

open access: yesAdvanced Engineering Materials, EarlyView.
This article presents the design, modeling, and characterization of air‐pressure–actuated programmable vibroacoustic metamaterials (PVAMM). The study focuses on leveraging air pressure to dynamically tune resonance frequencies for effective noise attenuation.
William Kaal   +2 more
wiley   +1 more source

Coordinated control strategy for MMC-CLCC considering AC voltage support and active power transmission

open access: yesInternational Journal of Electrical Power & Energy Systems
The hybrid HVDC transmission system employing the Modular Multilevel Converter (MMC) at the sending end and the Controllable Line-Commutated Converter (CLCC) at the receiving end offers advantages such as avoiding commutation failures and providing ...
Weiru Wang   +5 more
doaj   +1 more source

A Simplified Laminar Flow Model for the Pultrusion of Glass Fiber/Polyethylene Terephthalate Commingled Yarns

open access: yesAdvanced Engineering Materials, EarlyView.
A simplified thermoplastic pultrusion model is developed to predict thermal fields in glass fiber/polyethylene terephthalate (GF/PET) composites with reduced computational cost. By combining effective material homogenization, validation against literature data, and Gaussian‐process‐based optimization, the study reveals how heating limits, pulling speed,
Elder Soares   +3 more
wiley   +1 more source

Physical propagation and anomaly identification of transformer with HVDC&RTTS stray current invasion

open access: yesInternational Journal of Electrical Power & Energy Systems
Aiming at the operation stability of the transformer with stray current invasion, the evolution and propagation of multiple information is investigated in this paper.
Chao Pan   +5 more
doaj   +1 more source

Simulation of a Power Substation's Control System Operation

open access: yes, 2011
This paper describes a simulator of power substation automation system developed as part of software suit for complex simulation of power substation operation.
Peter Bracinik, Marek Roch, Marek Hoger
core   +1 more source

Inverse Identification of Energy‐Dependent Laser Absorptivity in NiTi Laser Powder‐Bed Fusion via Calibrated Melt Pool Simulation

open access: yesAdvanced Engineering Materials, EarlyView.
A combined experimental–computational framework identifies energy‐dependent laser absorptivity for NiTi in laser powder‐bed fusion, applicable to conduction and transition modes. Single‐track experiments and thermofluid smoothed particle hydrodynamics simulations are coupled through inverse analysis of melt pool geometry.
Mohamadreza Afrasiabi   +3 more
wiley   +1 more source

Coordinated Suppression Method of Fault Current for DC Grid with Novel Dissipative Resistors Topology

open access: yesCSEE Journal of Power and Energy Systems
A DC grid based on half-bridge modular multilevel converters (HB-MMC) is a feasible means to realize the friendly grid connection of renewable energy.
Shouqi Jiang   +5 more
doaj   +1 more source

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