Exploració per tema "Powder metallurgy -- Mathematical models"
Ara es mostren els items 1-14 de 14
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A robust approach to model densification and crack formation in powder compaction processes
(Wiley and Sons, 2011-08-26)
Article
Accés restringit per política de l'editorialThis paper deals with the question of how to efficiently integrate a constitutive model that describes the densification of powders and the potential formation of cracks in Powder Metallurgy (P/M) cold compaction processes. ... -
Data generation for the numerical simulation of powder compaction
(European Powder Metallurgy, 2005)
Text en actes de congrés
Accés obertNumerical simulation of industrial plastic deformation processes needs of a precise characterization of the mechanical material properties included in the particular elastoplastic model. The plasticity model of bulk metallic ... -
Effect of a thermal annealing on the mechanical behaviour of green pm compacts
(European Powder Metallurgy, 2001)
Text en actes de congrés
Accés obertCold die compaction can produce different effects on the dimensional and mechanical behaviour of green PM compacts. They can be due to different causes, such as residual stresses, microcracks and others. Residual stresses ... -
Elastic behaviour under compressive stresses states of sintered metallic parts
(European Powder Metallurgy, 2003)
Text en actes de congrés
Accés obertThe mechanical response in service of a component is mainly determined by its elastic behaviour. Traditionally, metallic materials have been characterized by means of tensile tests, even in the case of sintered ones. In ... -
Elastoplastic simulation of contacts among particles in granular materials
(European Powder Metallurgy Association, 2003)
Text en actes de congrés
Accés obertThe mechanisms governing the densification of powdered materials under compaction are highly dependent on the deformation and the state of stress in the contact among particles. Therefore, a micromechanical model can be ... -
Experimental and numerical study of the die filling stage in powder metallurgy
(European Powder Metallurgy, 2005)
Text en actes de congrés
Accés obertThe aim of this work is to show the potential of the Particle Finite Element Method (PFEM) in the simulation of the powder transfer stage, in powder metallurgy industrial processes. The most innovative aspects of the work ... -
Experimental study of mass flow and apparent density in powder metallurgy die filling
(European Powder Metallurgy, 2005)
Text en actes de congrés
Accés obertDie filling is the first step in the process of powder compaction. The density distribution after die filling on the powder properties and the method of filling. In this work the authors study the effects of powders ... -
Modelling of the plasticity in cold compaction of metal powders
(Universidad Carlos III de Madrid (UC3M), 2001)
Text en actes de congrés
Accés obertPowder Metallurgical Industry is very interested in spreading its applications and improve the quality of the PM products. Therefore, a detailed knowledge of their processes, in order to control them, is necessary. Many ... -
Numerical modeling of crack formation in powder forming processes
(2011-01)
Article
Accés obertThis paper presents a constitutive model describing the mechanical behavior of metal powders during (uniaxial) cold die compaction processes, placing special emphasis on the modeling of cracks formed during the ejection ... -
Numerical modeling of crack formation in power compaction processes
(Universitat Politècnica de Catalunya. Centre Internacional de Mètodes Numèrics en Enginyeria (CIMNE), 2009)
Llibre
Accés obertPowder metallurgy (P/M) is an important technique of manufacturing metal parts from metal in powdered form. Traditionally, P/M processes and products have been designed and developed on the basis of practical rules and ... -
On the proper characterization of tooling motions and initial conditions in powder die compaction modeling
(2011-08)
Article
Accés obertThe present paper is concerned with the finite element modeling of Powder Metallurgy (P/M) cold die compaction process. Rather than on material constitutive theories or on numerical algorithmic issues, attention is confined ... -
Simulation of hot stamping processes
(Grips' Media Gmbh, 2008)
Text en actes de congrés
Accés restringit per política de l'editorialHot stamping is a thermo-mechanical technique that enables to give to a metallic blank the desired geometry and properties in a single step, where deformation at high temperature, phase transformations and heat transfer ... -
Simulation of the cold compaction process of a structural pm part
(2001)
Text en actes de congrés
Accés obertIn the Metalworking Industry the design and the control of the processes have been traditionally based on the experience and, sometimes, considered as an art. The application of numerical methods reduces the costs of the ... -
Simulation of the compaction process of a two-level powder metallurgical part
(Universidad Carlos III de Madrid (UC3M), 2001)
Text en actes de congrés
Accés obertIn this work, a Plasticity model for granular materials, based on the Drucker-Prager/CAP model, is applied to represent the behaviour of the metallic powders during their cold die compaction. The elastic deformation has ...
