The Experts below are selected from a list of 41982 Experts worldwide ranked by ideXlab platform
Susumu Shima - One of the best experts on this subject based on the ideXlab platform.
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cosserat continuum theory to simulate microscopic rotation of magnetic Powder in applied magnetic field
2000Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder Behavior is discussed.
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magnetic cosserat continuum theory to simulate Behavior of magnetic Powder during compaction in applied magnetic field
1998Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder behaviour is discussed.
Hidetoshi Kotera - One of the best experts on this subject based on the ideXlab platform.
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cosserat continuum theory to simulate microscopic rotation of magnetic Powder in applied magnetic field
2000Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder Behavior is discussed.
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magnetic cosserat continuum theory to simulate Behavior of magnetic Powder during compaction in applied magnetic field
1998Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder behaviour is discussed.
A R Khoei - One of the best experts on this subject based on the ideXlab platform.
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a three invariant cap plasticity with isotropic kinematic hardening rule for Powder materials model assessment and parameter calibration
2007Co-Authors: A R Khoei, H DormohammadiAbstract:Abstract The constitutive modeling of Powder is clearly a keystone of successful quantitative solution possibilities. Without a reasonable constitutive model, which can reproduce complicated Powder Behavior under loading conditions, the computations are worthless. In this paper, a three-invariant cap plasticity model with isotropic–kinematic hardening rule is presented for Powder materials. A generalized single-cap plasticity is developed which can be compared with some common double-surface plasticity models proposed for Powders in literature. The hardening rule is defined based on the isotropic and kinematic material functions. The constitutive elasto-plastic matrix and its components are derived by using the definition of yield surface, material functions and nonlinear elastic Behavior, as function of hardening parameters. The procedure for determination of material parameters is described. Finally, the applicability of the proposed model is demonstrated in numerical simulation of triaxial and confining pressure tests.
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3d computational modeling of Powder compaction processes using a three invariant hardening cap plasticity model
2006Co-Authors: A R Azami, A R KhoeiAbstract:In this paper, a three-invariant cap plasticity is developed for description of Powder Behavior under cold compaction process. The constitutive elasto-plastic matrix and its components are derived as the nonlinear functions of Powder relative density. Different aspects of 2D and 3D cap plasticity models are illustrated and the procedure for determination of Powder parameters is described. It is shown how the proposed model could generate the elliptical yield surface, double-surface cap plasticity and the irregular hexagonal pyramid of the Mohr-Coulomb and cone-cap yield surface, as special cases. The single-cap plasticity is performed within the framework of large finite element deformation, in order to predict the nonuniform relative density distribution during Powder die pressing. Finally, the applicability of the proposed model for description of Powder Behavior is demonstrated in numerical simulation of triaxial and confining pressure tests. The numerical schemes are examined for efficiency in the modeling of an automotive component, a conical shaped-charge liner and a connecting-rod.
Muneo Sawada - One of the best experts on this subject based on the ideXlab platform.
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cosserat continuum theory to simulate microscopic rotation of magnetic Powder in applied magnetic field
2000Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder Behavior is discussed.
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magnetic cosserat continuum theory to simulate Behavior of magnetic Powder during compaction in applied magnetic field
1998Co-Authors: Hidetoshi Kotera, Muneo Sawada, Susumu ShimaAbstract:Numerical method based on the Cosserat continuum theory is proposed for simulating Behavior of a magnetic Powder in an applied magnetic field. The Maxwell stress is induced in the magnetic Powder. During Powder forming process in the magnetic field, the magnetic particles are thus rotated and transferred by both mechanical and magnetic interaction. To simulate such Powder Behavior, we formulate a finite element equation considering Maxwell stress based on the Cosserat continuum theory of compressible plasticity. The Powder Behavior with magnetic alignment during compaction in magnetic field is simulated by the proposed method and the effect of couple-stress on the Powder behaviour is discussed.
S S Babu - One of the best experts on this subject based on the ideXlab platform.
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investigating the effect of metal Powder recycling in electron beam Powder bed fusion using process log data
2020Co-Authors: Sujana Chandrasekar, Jamie B Coble, Sean Yoder, Peeyush Nandwana, Ryan R Dehoff, Vincent C Paquit, S S BabuAbstract:Abstract Recycling metal Powders in the Additive Manufacturing (AM) process is an important consideration in affordability with reference to traditional manufacturing. Metal Powder recyclability has been studied before with respect to change in chemical composition of Powders, effect on mechanical properties of produced parts, effect on flowability of Powders and Powder morphology of parts. However, these studies involve ex situ characterization of Powders after many use cycles. In this paper, we propose a data-driven method to understand in situ Behavior of recycled Powder on the build platform. Our method is based on comprehensive analysis of log file data from various sensors used in the process of printing metal parts in the Arcam Electron Beam Melting (EBM) ® system. Using rake position data and rake sensor pulse data collected during Arcam builds, we found that Inconel 718 Powders exhibit additional Powder spreading operations with increased reuse cycles compared to Ti-6Al-4V Powders. We substantiate differences found in in situ Behavior of Ti-6Al-4V and Inconel 718 Powders using known sintering Behavior of the two Powders. The novelty of this work lies in the new approach to understanding Powder Behavior especially spreadability using in situ log file data that is regularly collected in Arcam EBM® builds rather than physical testing of parts and Powders post build. In addition to studying Powder recyclability, the proposed methodology has potential to be extended generically to monitor Powder Behavior in AM processes.
