Results 101 to 110 of about 685,333 (350)

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

Longitudinal Protection of Grid-Forming New Energy Outgoing Lines Based on Composite Sequence Current Characteristics

Zhongguo dianli
The access of grid-forming new energy centralized transmission system has significantly changed the fault characteristics of the grid, and the traditional longitudinal protection is prone to sensitivity reduction or even refusal risk when the ...
Song YUAN, Zhao GE, Jiajie Tang, Jiabao MEI   +3 more
doaj   +1 more source

Improved Dual Closed-Loop Control for Modular Multilevel Converters Based on Voltage Drop on Grid Impedance [PDF]

Dianli jianshe
[Objective] As renewable power bases gradually expand from load centers to remote areas such as deep offshore， deserts， and barren lands， using grid-forming voltage source converter-based high voltage direct current （VSC-HVDC） transmission technology is ...
LIU Shan, LIU Qi, ZHU Lin, YAN Jun, CHI Chengbin, SUN Zengjie
doaj   +1 more source

Aluminium extrusion analysis by the finite volume method [PDF]

, 2013
Present work proposes a novel numerical scheme to calculate stress and velocity fields of metal flow in axisymmetric extrusion process in steady state.
Bressan, Jose D., Button, Sergio T., Martins, Marcelo M.   +2 more
core  

Boundary-induced nucleation control: A theoretical perspective

, 2018
The pre-patterning of a substrate to create energetically more attractive or repulsive regions allows one to generate a variety of structures in physical vapor deposition experiments.
Buller, Oleg, Chi, Lifeng, Heuer, Andreas, Wang, Hong, Wang, Wenchong   +4 more
core   +1 more source

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

Advanced 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, Daniel E. Driemeyer, Aaron P. Stebner   +2 more
wiley   +1 more source

Convolutional Neural Network for the Classification of the Control Mode of Grid-Connected Power Converters

Energies
With the integration of power converters into the power grid, it becomes crucial for the Transmission System Operator (TSO) to ascertain whether they are operating in Grid Forming or Grid Following modes.
Rabah Ouali, Martin Legry, Jean-Yves Dieulot, Pascal Yim, Xavier Guillaud, Frédéric Colas   +5 more
doaj   +1 more source

Robust Spot Melting by 3D Spot Arrangements in Electron Beam Powder Bed Fusion

Advanced Engineering Materials, EarlyView.
This work proposes an approach to replace separately melted contours for spot melting in electron beam powder fusion. Adapting the spot arrangements close to the contour combined with stacking yields a comparable surface quality without the inherent challenges of separate contours, as demonstrated, by electron optical images and roughness measurements.
Tobias Kupfer, Lukas Spano, Sebastian Pohl, Carolin Körner, Matthias Markl   +4 more
wiley   +1 more source

Double-sided solar cell package [PDF]

, 1979
In a solar cell array of terrestrial use, an improved double-sided solar cell package, consisting of a photovoltaic cell having a metallized P-contact strip and an N-contact grid, provided on opposite faces of the cell, a transparent tubular body forming
Shelpuk, B.
core   +1 more source

Extended Lyman-Alpha Emission around Star-forming Galaxies

, 2011
Lyman-alpha (Lya) photons that escape the interstellar medium of star-forming galaxies may be resonantly scattered by neutral hydrogen atoms in the circumgalactic and intergalactic media, thereby increasing the angular extent of the galaxy's Lya emission.
Berlind, Bond, Bouwens, Cowie, David Weinberg, Faucher-Giguère, Finkelstein, Gawiser, Guaita, Hayashino, Hayes, Hy Trac, Jordi Miralda-Escudé, Kashikawa, Keel, Kollmeier, Kravtsov, Kunth, Laursen, Loeb, Madau, Malhotra, Ono, Ouchi, Ouchi, Pieri, Rauch, Renyue Cen, Rhoads, Shopbell, Steidel, Steidel, Steidel, Taniguchi, Trac, Trac, Veilleux, Zheng, Zheng, Zheng Zheng, Östlin   +40 more
core   +1 more source