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检索条件"任意字段=5th International Conference on Thermal Process Modeling and Computer Simulation, ICTPMCS 2014"

共 55 条记录，以下是11-20 订阅

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Constitutive behavior and modeling of cast aluminum alloys during the quenching process 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Wang, Qigui Xiao, Bowang Global Powertrain Engineering General Motors Company PontiacMI United States

ISBN: (纸本)1627080686

To predict residual stress and distortion in cast aluminum alloys during quenching, a detailed mathematic description of the constitutive behavior of the alloys is required in the as- solutionized condition. In this work, a thermo-viscoplastic model was developed to model the material constitutive behavior during quench. To calibrate the constitutive model, uniaxial tensile tests were performed over a range of temperatures (from room temperature to 500 °C) and strain- rates (from 10-4 to 1 s-1) encompassing those normally experienced during the quenching process. Copyright © 2014 ASM international ® All rights reserved.

关键词： Strain rate

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Parameters effecting submerged plumes in quench systems 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Banka, Andrew L. Mackenzie, D. Scott Airflow Sciences Corporation LivoniaMI United States Houghton International Inc. Valley ForgePA United States

ISBN: (纸本)1627080686

the use of submerged nozzles to provide agitation is commonplace in the design of quench tanks. the details of submerged nozzle agitation designs can vary considerably, however, and the effectiveness of any given design is not known. the purpose of this investigation is to use Computation Fluid Dynamics to understand the effects of several key parameters, including header design, nozzle design, and velocity on the apparent flow field in a quench system. A limited number of those parameters will be investigated, and the resultant flow fields will be presented. Copyright © 2014 ASM international ® All rights reserved.

关键词： Flow fields

来源：评论

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modeling induction heat distribution in carbon fiber reinforced thermoplastics 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Goldstein, Robert C. Jackowski, John K. Nemkov, Valentin S. Fluxtrol Inc. Aubum HillsMI United States

ISBN: (纸本)1627080686

Being contactless and volumetric, Induction heating has proven to be an effective method for producing high strength weld joints between Carbon Fiber Reinforced thermoplastic (CFRT) components. there are inherent challenges with the implementation of this technology due to the anisotropic nature of CFRT. the anisotropic electrical and thermal properties of CFRT plate are described. the properties are inputted to a FEA program for electromagnetic and thermal simulation. the program is used to design an induction coil with a goal of achieving uniform temperature distribution in a lap joint between two CFRT plates. Effect of frequency, material orientation, and coil design is examined. Copyright © 2014 ASM international ® All rights reserved.

关键词： Induction heating

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Optimization of alloying of heat resistant core wires for ARC spraying by neural network modeling 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Korobov, Yu. Nevezhin, S. Verkhorubov, V. Rimer, G. Zhilin, A. Ural Federal University Yekaterinburg Russia

ISBN: (纸本)1627080686

A neural network model has been developed with respect to arc spraying. the model describes the influence of process parameters and initial composition of the sprayed core wire on the alloying elements content in the resulting coating. On the base of the model by minimum coating oxidation criterion an optimal alloying system of core wire of Fe-Cr-Al-Si-Ti-Y- type has been determined which can be used to obtain heat- resistant coatings. the results obtained are in a good agreement with the results of our own and third-party researches. Copyright © 2014 ASM international ® All rights reserved.

关键词： Neural network models

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A through-process model for cold sprayed aluminum alloys 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Belsito, D. McNally, B. Bassett, L. Sisson, R. Champagne, V. Worcester Polytechnic Institute Worcester United States U.S. Army Research Laboratory AberdeenMD United States

ISBN: (纸本)1627080686

A through-process model is being developed to predict final properties of cold sprayed material as a function of the starting material and process parameters. this model can be used to optimize these conditions and materials for a variety of applications. the stages of the model, which are developed independently, are Powder Production, Powder Pre-processing, Cold Spray process Parameters, Particle Impact, and Post- Spray processing. these stages will be discussed, in addition to experimental analysis to support the model results. Copyright © 2014 ASM international ® All rights reserved.

关键词： Aluminum alloys

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A time-compressed numerical approach for thermal analysis of preheating process powder metallurgy 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Shlok, S. Shivpuri, R. Ducato, A. Integrated Systems Engineering Ohio State University OH United States Department of Chemical Management Computer and Mechanical Engineering University of Palermo Palermo Italy

ISBN: (纸本)1627080686

thermal properties of powder material/particulate media differ significantly from bulk macroscopic/continuum properties. Preheating metal or superalloy powders can take place for several hours depending on homogenization, densification and green strength required for further processing and application. Finite element simulations for these long thermal cycles are generally complex and time consuming. this paper provides a numerical time compressed approach using finite element software DEFORM ™ by modifying thermal parameters based on theoretical relationship linking bulk properties to powder as a function of density. A comparison is done between fully dense material with powder thermal properties and porous material with bulk thermal properties to analyze the effect of these parameters on functioning of numerical model. the influence of thermal conductivity and heat capacity on time-compression approach is also investigated. the results obtained using time compression approach are compared to standard numerical simulations that replicate thermal evolution during the preheating process. Copyright © 2014 ASM international ® All rights reserved.

关键词： thermoanalysis

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An ABAQUS implementation of finite element analysis of steady state manufacturing process in an Eulerian frame 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Qin, Xiaoliang Zhou, Li Liu, Guomai School of Information Science and Engineering Fujian University of Technology Fuzhou350011 China

ISBN: (纸本)1627080686

In the past three decades, extensive research has focused on the application of numerical methods for the simulation of manufacturing processes. Most commonly, the simulations involved performing coupled thermal mechanical finite element analyses in Lagrangian reference frames assuming rate independent elasto-plastic material response. Lagrangian analysis may become computationally demanding in three- dimensional models when several thousand time increments are needed for simulation of the manufacturing processes. Some manufacturing processes, such as welding, rolling, cutting, and extrusion, can be treated as quasi-steady state in an Eulerian frame. the Eulerian analysis solves the problem at once rather than taking several time increments as in the Lagrangian. the objective of this work is to implement an Eulerian formulation of Anand's model in modeling residual stress of manufacture processes in ABAQUS user defined element. Such an implementation has the potential to reduce computational cost in modeling manufacture processes. An Eulerian reference frame is also more advantageous in modeling processes with large deformation such as friction stir welding, rolling and extrusion since excessive mesh distortion and re-meshing are no issues as the case of Lagrangian models. Copyright © 2014 ASM international ® All rights reserved.

关键词： Finite element method

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Structural materials data demonstration project: Resource for thermal process modeling 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Henry, Scott Berardinis, Larry Campbell, Carelyn Dima, Alden Kattner, Ursula Searles, Tom Bartolo, Laura Hunt, Warren ASM International United States National Institute of Standards and Technology United States Materials Data Management Inc. United States Kent State University Center for Materials Informatics United States Nexight Group United States

ISBN: (纸本)1627080686

Integrated Computational Materials Engineering requires the availability of supporting data for modeling across multiple length scales. It also requires robust data schema and input- output protocols. To address these needs, a team working under a grant from the National Institute of Standards and Technology has launched the Structural Materials Data Demonstration Project, a collaborative effort led by ASM international to establish best practices for materials database development and application. In its initial phase, the project is focusing on the heat treatable aluminum 6061 alloy and ternary subsystem of Al-Mg-Si, incorporating experimental diffusion, phase equilibria, microstructural, and mechanical property data. this paper outlines the purpose and scope of the project and discusses challenges in materials data management and organization. It also describes a test problem in which demonstration data can be used to model the effects of composition and heat treatment on various properties of aluminum 6061-T6. Copyright © 2014 ASM international ® All rights reserved.

关键词： Information management

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thermal control of the friction stir welding process 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Stockman, Tom J. Cobb, Josef B. Schneider, Judy Walker, Bryant Mechanical Engineering Department Mississippi State University United States

ISBN: (纸本)1627080686

Friction stir welding (FSWing) is a solid state joining process in which shoulder driven frictional and pin driven deformational heating combine to heat the metal to a plasticized state. the movement of the rotating tool then stirs this plasticized metal together to produce a weld. thus the metal temperature is not directly controlled resulting in variations which may prove detrimental to the material properties, especially in age hardenable alloys. As the process is theorized to be dominated by a high shear strain at instantaneously high shear strain rates, attempts to model the heat generation and material deformation are not straight forward. Methods to decouple the heating and stirring processes have resulted in a modification of FSWing referred to as thermal stir welding (TSWing). Rather than relying on the frictional and deformational heat input to control the temperature, an induction coil can be independently used to preheat the material. thus as the temperature within the panel is affected by constraints such as workpiece geometry and backing anvil, the coil heating contribution can be increased or decreased to maintain a constant global temperature. this simplifies the modeling approach to control parameters for maintaining a constant global temperature within the workpieces. Copyright © 2014 ASM international ® All rights reserved.

关键词： Friction stir welding

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computer modeling of mechanical properties and microsructure of quenched steel specimen 5

引用

5th international conference on thermal process modeling and computer simulation, ictpmcs 2014

作者： Smoljan, Božo Lljkić, Dario Department of Materials Science and Engineering Faculty of Engineering University of Rijeka Vukovarska 58 Rijeka51000 Croatia

ISBN: (纸本)1627080686

the research purpose is to upgrade the mathematical modeling and computer simulation of quenching of steel. Based on theoretical analyze of physical processes which exist in quenching systems the proper mathematical model is established and computer software is developed. On the basis of control volume method, the algorithm for prediction of mechanical properties and microstructure distribution in quenched steel specimens with complex geometries has been developed. the computer simulation of steel hardening is consisted of numerical calculation of transient temperature field in process of cooling, and of numerical calculation of mechanical properties. the hardness has been predicted by the conversion of calculated time of cooling from 800 to 500 °C at specimen points to the hardness. Conversion of cooling time results to the hardness was done based on Jominy hardenability curve. Other mechanical properties can be predicted based on hardness results. Physical properties that were included in the model, such as heat conductivity coefficient, heat capacity and surface heat transfer coefficient were obtained by the calibration. the established method in efficient approach combines not expensive experimental Jominy test with computer modeling of transient temperature field in prediction of mechanical properties and behavior of steel during the quenching. the algorithm is completed to solve 3-D situation problems such as the quenching of complex cylinders, cones, spheres, etc. the established model of steel quenching can be successfully applied in the practice of heat treatment. Copyright © 2014 ASM international ® All rights reserved.

关键词： Hardness

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