P. Lamy-Bracq, J. Leroy, and C. Coulouarn
NEXTER Munitions, Bourges, France
ENSI Bourges, Bourges, France
The rheological behaviour of a biphasic material is quite difficult to model because of the difficulties to represent the evolution of the space position of each solid particle in the solid matrix. The first part of this study consider an equivalent material by homogeneisation method. The main point of this first part was the representation of the rotation of the rheological mobile. The second ...
G. Maizza, R. Cagliero, and A. Santoro
Dipartimento di Scienza dei Materiali ed Ingegneria Chimica, Politecnico di Torino, Torino, Italy
Powder metallurgy is a key technology for manufacturing advanced components based on TiAl alloys. Cold compaction is the primary step to produce green parts. Cold deformation of TiAl powder is difficult due to its typical poor ductility. Plastic deformation and cracking susceptibility of TiAl powder strongly depends on micro-mechanical phenomena. To manage real compaction problems more reliable ...
S. Pietrzyk, and G.S. Yablonsky
Unité de Catalyse et Chimie du Solide, Université des Sciences et Technologies de Lille, France
Parks College, Saint Louis University, St. Louis, MO, USA
TAP (Temporary Analysis of Products) reactors are powerful instruments to study the kinetics of catalytic reactions. Their basic principle, exposition of evacuated solids of interest to narrow pulses containing very small amounts of gases, and measuring the concentrations of outgoing molecules permits to study practical catalysts under the conditions approaching those of molecular beam ...
M. Antczak, P. Idziak, and W. Lyskawiski
Poznań University of Technology, Poland
The paper presents the results of the experiment consisting in determination of the influence of the magnetic field on deformations of the stator and the rotor of the DC motor. The numerical model of the motor for the frameless DC machine of the G series has been elaborated. Real material properties and the phenomenon of the magnetic circuit saturation have been taken into consideration. The ...
Center for Product Development, Mads Clausen Institute, South Danish University, Denmark
This paper will give a short overview of use of COMSOL Multiphysics for analyzing ancient Greek and Roman catapults with the main focus on the energy storing torsion springs. Catapults have been known and used in the Greek and Roman world from around 399 BC and a fully standardized design for powerful torsion catapults emerged around 270 BC, based on one basic factor, the diameter of the torsion ...