Papers

Modelling of lubrication and roughness evolution in metal forming processes Stanisław  Stupkiewicz, A. Marciniszyn Instytut Podstawowych Problemów Techniki PAN, Warszawa. DOI: https://doi.org/10.7494/cmms.2004.1.0049 Abstract: In this paper a micromechanical modelling approach is proposed, which is aimed at studying the lubricant flow and asperity deformation in the thin-film hydrodynamic lubrication regime. A finite element model is developed … Read more

Load models variation in numerical modeling of extrusion dies Piotr Czyżewski, Andrzej Kocańda Wydział Inżynierii Produkcji, Politechnika Warszawska. DOI: https://doi.org/10.7494/cmms.2004.1.0051 Abstract: There has been presented the results of numerical analysis of cyclic loading of forward extrusion dies. Various techniques reported in literature have been used in this work for modeling of cyclic loading. Comparison of … Read more

Full potential LAPW AB initio calculations in materials science Andrzej Koleżyński AGH University of Science and Technology. DOI: https://doi.org/10.7494/cmms.2004.1.0052 Abstract: In this paper, the overview and practical aspects of ab initio calculations using WIEN97 FP-LAPW package are presented. A step by step process of parameters setting and refinement is described in details. The results of … Read more

Document driven ontological engineering with applications in casting defects diagnostic Stanisław Ciszewski, Stanisława Kluska-Nawarecka AGH University of Science and Technology. DOI: https://doi.org/10.7494/cmms.2004.1.0053 Abstract: Ontological engineering has been widely used to specify constraints which guarantee correct, robust and verified data interchange between agents and systems. The paper presents methodology of creating ontological theories from documents. The … Read more

Step by step interpolation Bogusław Bożek, Prokop Środa AGH University of Science and Technology. DOI: https://doi.org/10.7494/cmms.2004.1.0054 Abstract: In this paper step by step interpolation method is presented. Our method consists in that we take the shape of a curve (or a surface) and stretch it succesively (step by step) through given nodal points. Cite as: Bożek, … Read more

Numerically enhanced optimization of bi-material rod and tube extrusion Paweł Kazanowski, Wojciech Misiołek, Mario E. Epler, Vinod K. Sikka 1Institute for Melal Forming, Lehigh University, 5 East Packer Aveniue, Bethlehem, PA, USA. 2Oak Ridge National laboratory, One Bethel Valley Road, 508, Oak Ridge, TN 37831, USA. DOI: https://doi.org/10.7494/cmms.2003.3.0043 Abstract: The presented research results are an … Read more

Application of optimal control theory methods to design of rolling technology Dmitry Svetlichnyy Politechnika Częstochowska, Wvdzial Inżynierii Procesowej, Materiałowej i Fizyki Stosowanej. DOI: https://doi.org/10.7494/cmms.2003.3.0044 Abstract: The paper deals with the application of control theory techniques in the flat rolling processes. Algorithms of optimal control problem solution are presented. Optimization problem for entire multi-pass rolling design … Read more

Relative importance of input signals of neural network Marcin Perzyk, Andrzej Kochański, Jacek Kozłowski Instytut Technogii Materiałowych Politechniki Warszawskiej. DOI: https://doi.org/10.7494/cmms.2003.3.0045 Abstract: Several types of relative importance factors of input signals of neural network are analyzed and assessed using simulated training sets. Behavior of the factors for characteristic cases of synergetic influences of input signals … Read more