Results 231 to 240 of about 1,025,521 (291)
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
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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 +4 more
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Numerical Exploration of Thermal Shock Resistance in MgO–C Refractories
Advanced Engineering Materials, EarlyView.A mesostructure‐resolved numerical framework is developed to evaluate the thermal shock resistance of MgO–C refractories. By modeling interface debonding under rapid temperature changes and introducing a modified thermal shock parameter that accounts for mesocracks, the study shows how graphite content and aggregate size influence thermal shock ...
Jishnu Vinayak Gopi +3 more
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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 +4 more
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Optics Letters, 1989
Vector coupled-mode theory is extended beyond the conventional first-order treatment. Good results are obtained from the extended theory in the case of waveguides with large index discontinuity.
H A, Haus, W P, Huang, A W, Snyder
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Vector coupled-mode theory is extended beyond the conventional first-order treatment. Good results are obtained from the extended theory in the case of waveguides with large index discontinuity.
H A, Haus, W P, Huang, A W, Snyder
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Proceedings of the IEEE, 1991
The authors give a brief historic perspective of the coupled mode theory. The development and applications of the theory in microwaves in early years and in optoelectronics and fiber optics in recent years are described. They then consider lossless coupling of two modes in time.
H.A. Haus, W. Huang
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The authors give a brief historic perspective of the coupled mode theory. The development and applications of the theory in microwaves in early years and in optoelectronics and fiber optics in recent years are described. They then consider lossless coupling of two modes in time.
H.A. Haus, W. Huang
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The Journal of the Acoustical Society of America, 2000
Conventional coupled modes are combined with perturbation theory to allow fast range-dependent normal mode calculations in deep water. The mode-coupling method follows R. B. Evan’s two-way coupled mode formulation [R. B. Evans, J. Acoust. Soc. Am. 74, 188–195 (1983)], where conservation of pressure and particle displacement along the z axis yields an ...
Chris J. Higham +2 more
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Conventional coupled modes are combined with perturbation theory to allow fast range-dependent normal mode calculations in deep water. The mode-coupling method follows R. B. Evan’s two-way coupled mode formulation [R. B. Evans, J. Acoust. Soc. Am. 74, 188–195 (1983)], where conservation of pressure and particle displacement along the z axis yields an ...
Chris J. Higham +2 more
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Journal of Modern Optics, 1995
Abstract We consider a system of two harmonic quantum oscillators in interaction with a white noise ‘heat’ bath and discuss peculiarities due to their induced coupling. We derive from the Markov approximation exact expressions for the stationary occupation numbers, the spectrum of the emitted light and the intensity correlation functions.
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Abstract We consider a system of two harmonic quantum oscillators in interaction with a white noise ‘heat’ bath and discuss peculiarities due to their induced coupling. We derive from the Markov approximation exact expressions for the stationary occupation numbers, the spectrum of the emitted light and the intensity correlation functions.
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Generalized Coupled Mode Theory
Journal of Applied Physics, 1961The pairwise coupling of modes in distributed systems such as the traveling-wave parametric electron-beam amplifier and many other types is shown to permit only two types of interaction. One type, called β coupling, results in the periodic interchange of the signal between the modes, as typified in the Kompfner-null coupler.
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1983
In the previous chapter we introduced coupled mode theory to describe propagation on waveguides with slight perturbations which vary arbitrarily with distance along the waveguide. Here we consider waveguides with arbitrarily large nonuniformities, but with the proviso that they vary slowly along the length of the waveguide. We introduced the concept of
Allan W. Snyder, John D. Love
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In the previous chapter we introduced coupled mode theory to describe propagation on waveguides with slight perturbations which vary arbitrarily with distance along the waveguide. Here we consider waveguides with arbitrarily large nonuniformities, but with the proviso that they vary slowly along the length of the waveguide. We introduced the concept of
Allan W. Snyder, John D. Love
openaire +1 more source