Results 51 to 60 of about 420 (253)

Rafting of Ni‐Based Superalloys Under Multiaxial Load as Understood by Phase‐Field Simulations and Critical Experiments

Advanced Engineering Materials, EarlyView.
Phase‐field simulations coupled with dislocation‐density‐based crystal plasticity modeling reproduce γ′ rafting behavior in single‐crystal Ni‐based superalloys under varied loading conditions. The model captures both macroscopic creep and microscopic morphology evolution, with results matching high‐temperature creep experiments.
Micheal Younan, David Bürger, Gunther Eggeler, Oleg Shchyglo, Ingo Steinbach, Muhammad Adil Ali   +5 more
wiley   +1 more source

Diagnostics of Winding Deformation in a Single-Phase Power Transformer with an Unloaded Tertiary Winding in Operational Mode

Acta Technologica Agriculturae, 2018
The presented paper is focused on the development of an algorithm and software implementation of this algorithm into diagnostics of winding deformation in a single-phase power transformer with an unloaded tertiary winding in operational mode.
Dorozhko Sergey, Krivunev Andrey
doaj   +1 more source

Identification of Power Transformer Winding Mechanical Fault Types Based on Online IFRA by Support Vector Machine

Energies, 2017
A transformer is the most valuable and expensive property for power utility, thus ensuring its reliable operation is a major task for both operators and researchers.
Zhongyong Zhao, Chao Tang, Qu Zhou, Lingna Xu, Yingang Gui, Chenguo Yao   +5 more
doaj   +1 more source

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

On the Feasibility of Localizing Transformer Winding Deformations Using Optical Sensing and Machine Learning

Photonics
Mechanical vibrations induced by electromagnetic forces during transformer operation can lead to winding deformation or failure, an issue responsible for over 12% of all transformer faults.
Najmeh Seifaddini, Meysam Beheshti Asl, Sekongo Bekibenan, Simplice Akre, Issouf Fofana, Mohand Ouhrouche, Abdellah Chehri   +6 more
doaj   +1 more source

A New Multi-Conductor Transmission Line Model of Transformer Winding for Frequency Response Analysis Considering the Frequency-Dependent Property of the Lamination Core

Energies, 2018
Multi-conductor transmission line (MTL) model of power transformer winding for frequency response analysis (FRA) has been successfully applied for the purpose of studying the characteristics of winding deformations. Most of the time it is considered that,
Song Wang, Ze Guo, Ting Zhu, Hanke Feng, Shuhong Wang   +4 more
doaj   +1 more source

Karl Popper and the Mechanisms of Hydrogen Embrittlement

Advanced Engineering Materials, EarlyView.
Representation of the beginning of loss of ductility rather than embrittlement. Small concentrations of hydrogen in a diffusible form within iron are well‐established to harm the mechanical integrity of steels. There are theories that attempt to explain the pernicious role of hydrogen.
H. K. D. H. Bhadeshia
wiley   +1 more source

Multimodal Data‐Driven Microstructure Characterization

Advanced Engineering Materials, EarlyView.
A self‐consistent autonomous workflow for EBSP‐based microstructure segmentation by integrating PCA, GMM clustering, and cNMF with information‐theoretic parameter selection, requiring no user input. An optimal ROI size related to characteristic grain size is identified.
Qi Zhang, Santiago Benito, Özge Özgün, Sebastian Weber, Markus Stricker   +4 more
wiley   +1 more source

Influence of Non‐Uniform Temperature Distribution on Elastoplastic Deformation of Windings

IET Electric Power Applications
To accurately analyse the deformation of transformer windings under short‐circuit conditions, a three‐dimensional multiphysics field simulation model of the magnetic‐fluid‐thermal‐structural coupling is constructed.
Jiajun Kou, Dongyang Li, Gang Liu, Wenxuan Zhou, Yunpeng Liu, Shuguo Gao, Haoyu Liu   +6 more
doaj   +1 more source

Symbolic Regression and Multi‐Objective Optimization of the Flory–Huggins Interaction Parameter for Hydrogels

Advanced Engineering Materials, EarlyView.
We develop a data‐driven method to derive the mathematical expressions of the Flory–Huggins interaction parameter χ for the swelling behavior of temperature–responsive hydrogels. Starting from initial assumptions of χ, our workflow combines Bayesian optimization, Flory–Rehner theory, and symbolic regression to generate candidate χ expressions.
Yawen Wang, Adrian Ehrenhofer, Thomas Wallmersperger   +2 more
wiley   +1 more source