The Experts below are selected from a list of 348231 Experts worldwide ranked by ideXlab platform
Michael I Darter - One of the best experts on this subject based on the ideXlab platform.
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implementation of the thin bonded concrete overlay of existing asphalt pavement Design Procedure in the aashtoware pavement me Design software
Transportation Research Record, 2017Co-Authors: Biplab B Bhattacharya, Alex Gotlif, Michael I DarterAbstract:This paper describes the implementation of the bonded concrete overlay of asphalt pavement mechanistic–empirical (BCOA-ME) Design Procedure, developed by the University of Pittsburgh, into the AASHTOWare Pavement ME Design software. The BCOA-ME Procedure was generally compatible with the mechanistic–empirical framework of Pavement ME and thus adaptable into the Design framework. A thin bonded concrete overlay of existing asphalt pavements includes short to medium joint spacings (typically 6 × 6 ft) and a strong bond or high-contact friction between the portland cement concrete slab and the existing asphalt concrete surface. As much of the theory, concepts, assumptions, and inputs in the BCOA-ME Design Procedure as possible were implemented into the Pavement ME software. Differences included those required to match the computational Procedures of Pavement ME (e.g., axle load spectra versus equivalent single-axle loads, monthly asphalt concrete damaged dynamic modulus, monthly portland cement concrete stren...
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reliability analysis of cracking and faulting prediction in the new mechanistic empirical pavement Design Procedure
Transportation Research Record, 2005Co-Authors: Michael I Darter, Lev Khazanovich, Tom Yu, Jag MallelaAbstract:Reliability analysis is an important part of the mechanistic-empirical pavement Design guide (M-E PDG). Even though mechanistic concepts provide a more accurate and realistic methodology for pavement Design, a practical method to consider the uncertainties and variations in Design and construction is needed so that a new or rehabilitated pavement can be Designed for a desired level of reliability (performance as Designed). Several methods, ranging from closed-form approaches to simulationbased methods, can be adopted to perform reliability-based Design. However, some methods may be more suitable than others, given the complexities of the Design Procedure. A formal definition of reliability within the context of the M-E PDG, as well as two reliability analysis approaches considered for incorporation into the Design Procedure for evaluating the reliability of the rigid pavement Design for cracking and faulting, was evaluated. A Monte Carlo-based simulation was combined with the damage accumulation Procedure...
Nicola Bianchi - One of the best experts on this subject based on the ideXlab platform.
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electromagnetic thermal Design Procedure of an aerospace electric propeller
IEEE Transactions on Industry Applications, 2015Co-Authors: Ikhlas Bouzidi, Ahmed Masmoudi, Nicola BianchiAbstract:Much attention is focused upon the integration of electric actuators in aerospace applications to accomplish many functions, including the propulsion one. Within this trend, this paper is aimed at the Design, modeling, and optimization of a five-phase fractional-slot permanent-magnet synchronous motor to be integrated in an electrically propelled plane. Accounting for the fact that the Design Procedure concerns both electromagnetic and thermal features, an analytical formulation of the corresponding major Design parameters is derived. Then, an electromagnetic/thermal finite-element analysis (FEA)-based investigation of the initial concept has led to an average temperature rise lower than the aerospace application limit one. An optimization of the initial Design is achieved using a FEA-based iterative Procedure that yields a 22.5% decrease of the stack length, resulting in a weight reduction of 22.6%.
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electromagnetic thermal Design Procedure of an aerospace electric propeller
IEEE Transactions on Industry Applications, 2015Co-Authors: Ikhlas Bouzidi, Ahmed Masmoudi, Nicola BianchiAbstract:Much attention is focused upon the integration of electric actuators in aerospace applications to accomplish many functions, including the propulsion one. Within this trend, this paper is aimed at the Design, modeling, and optimization of a five-phase fractional-slot permanent-magnet synchronous motor to be integrated in an electrically propelled plane. Accounting for the fact that the Design Procedure concerns both electromagnetic and thermal features, an analytical formulation of the corresponding major Design parameters is derived. Then, an electromagnetic/thermal finite-element analysis (FEA)-based investigation of the initial concept has led to an average temperature rise lower than the aerospace application limit one. An optimization of the initial Design is achieved using a FEA-based iterative Procedure that yields a 22.5% decrease of the stack length, resulting in a weight reduction of 22.6%.
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electromagnetic thermal Design Procedure of an aerospace electric propeller
International Conference on Ecological Vehicles and Renewable Energies, 2015Co-Authors: Ikhlas Bouzidi, Ahmed Masmoudi, Nicola BianchiAbstract:Much attention is focused upon the integration of electric actuators in aerospace applications to accomplish many functions, including the propulsion one. Within this trend, the paper is aimed at the Design, modeling and optimization of a five phase fractional-slot PM synchronous motor to be integrated in an electrically-propelled plane. Accounting for the fact that the Design Procedure concerns both electromagnetic and thermal features, an analytical formulation of the corresponding major Design parameters is derived. Then, an electromagnetic/thermal FEA-based investigation of the initial concept has led to an average temperature rise lower than the aerospace application limit one. An optimization of the initial Design is achieved using a FEA-based iterative Procedure thar yields a 22.5% decrease of the stack length resulting in a weight reduction of 22.6%.
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electromagnetic thermal Design Procedure of an aerospace electric propeller
International Conference on Ecological Vehicles and Renewable Energies, 2015Co-Authors: Ikhlas Bouzidi, Ahmed Masmoudi, Nicola BianchiAbstract:Much attention is focused upon the integration of electric actuators in aerospace applications to accomplish many functions, including the propulsion one. Within this trend, the paper is aimed at the Design, modeling and optimization of a five phase fractional-slot PM synchronous motor to be integrated in an electrically-propelled plane. Accounting for the fact that the Design Procedure concerns both electromagnetic and thermal features, an analytical formulation of the corresponding major Design parameters is derived. Then, an electromagnetic/thermal FEA-based investigation of the initial concept has led to an average temperature rise lower than the aerospace application limit one. An optimization of the initial Design is achieved using a FEA-based iterative Procedure thar yields a 22.5% decrease of the stack length resulting in a weight reduction of 22.6%.
Dan G Zollinger - One of the best experts on this subject based on the ideXlab platform.
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development of a mechanistic empirical structural Design Procedure for continuously reinforced concrete pavements
Transportation Research Record, 2004Co-Authors: Olga Selezneva, Dan G ZollingerAbstract:The concepts and approach used to develop a mechanistic-empirical structural Design Procedure for continuously reinforced concrete pavements (CRCP) are presented. Key aspects of the CRCP Design Procedure— including Design overview, Design inputs, structural response model, incremental damage analysis, and prediction of CRCP deterioration— are addressed. The mechanism of punch-out development is the foundation of the structural Design Procedure. Punch-out development is modeled by using mechanistic principles and damage accumulation over the Design life. The incremental damage is used to account for changes in many factors throughout the entire Design period, including material properties (portland cement concrete strength and modulus, erosion of base), seasonal climatic conditions, traffic loadings, crack load transfer, subgrade support, and others. Each analysis increment represents a specific combination of these factors during a selected period of time. Finally, accumulated damage is correlated with CR...
Biplab B Bhattacharya - One of the best experts on this subject based on the ideXlab platform.
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implementation of the thin bonded concrete overlay of existing asphalt pavement Design Procedure in the aashtoware pavement me Design software
Transportation Research Record, 2017Co-Authors: Biplab B Bhattacharya, Alex Gotlif, Michael I DarterAbstract:This paper describes the implementation of the bonded concrete overlay of asphalt pavement mechanistic–empirical (BCOA-ME) Design Procedure, developed by the University of Pittsburgh, into the AASHTOWare Pavement ME Design software. The BCOA-ME Procedure was generally compatible with the mechanistic–empirical framework of Pavement ME and thus adaptable into the Design framework. A thin bonded concrete overlay of existing asphalt pavements includes short to medium joint spacings (typically 6 × 6 ft) and a strong bond or high-contact friction between the portland cement concrete slab and the existing asphalt concrete surface. As much of the theory, concepts, assumptions, and inputs in the BCOA-ME Design Procedure as possible were implemented into the Pavement ME software. Differences included those required to match the computational Procedures of Pavement ME (e.g., axle load spectra versus equivalent single-axle loads, monthly asphalt concrete damaged dynamic modulus, monthly portland cement concrete stren...
Yuting Gao - One of the best experts on this subject based on the ideXlab platform.
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Design Procedure of flux reversal permanent magnet machines
IEEE Transactions on Industry Applications, 2017Co-Authors: Yuting GaoAbstract:Flux reversal permanent magnet machines (FRPMMs) exhibit many advantages such as simple rotor configuration, high torque density, fast transient response, etc. However, the general analytical Design Procedure of FRPMMs has not been established. Thus, this paper mainly focuses on developing an analytical Design methodology of three-phase FRPMMs. First, the sizing equations are derived based on a magneto motive force-permeance model. Then, the influences of several key parameters in the sizing equation, including slot-pole combination, airgap radius, electric loading, and equivalent magnetic loading on the torque density, are analyzed. Moreover, the feasible slot-pole combinations are summarized and the corresponding winding type of each combination is recommended in order to maximize the output torque. Additionaly, the detailed geometric Design of stator and rotor is presented. Finally, the proposed analytical Design Procedure is verified by finite element analysis and experiments on a 12-stator-slot/17-rotor-slot FRPMM prototype.
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Design Procedure of flux reversal permanent magnet machines
International Conference on Electrical Machines, 2016Co-Authors: Yuting GaoAbstract:Flux reversal permanent magnet machines (FRPMMs) exhibit many advantages such as simple rotor configuration, high torque density, fast transient response, etc. However, the general Design Procedure of FRPMMs has not been established. Thus, this paper mainly focuses on developing a Design methodology of three-phase FRPMMs. First, the sizing equations are analytical derived based on a magneto motive force (MMF)-permeance model. Then, the influences of several key parameters in the sizing equation including slot-pole combination, airgap radius, electric loading and equivalent magnetic loading on the torque density are analyzed. Moreover, the feasible slot-pole combinations are summarized and the corresponding winding types are recommended in order to maximize the output torque. Besides, the detailed geometric Design of stator and rotor are presented. Finally, the proposed Design method is verified by 2D finite element analysis (FEA) and experiments on a 12-slot/17-pole FRPMM prototype.
