Papers

Improvements of efficiency of finite element simulations of solidification due to adaptive mesh refinement and time-step selection Arkadiusz Nagórka Politechnika Częstochowska. DOI: https://doi.org/10.7494/cmms.2004.1.0048 Abstract: The paper deals with an application of adaptive mesh refinement and automatic time-step selection techniques to numerical simulations of solidification. High cooling and heating rates in the beginning of the process … Read more

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

Numerical modelling and simulation of sand mould manufacture process in lost foam casting Jerzy Rojek Instytut Podstawowych Problemów Techniki Polska Akademia Nauk, Warszawa. DOI: https://doi.org/10.7494/cmms.2003.3.0041 Abstract: This paper presents a numerical model of sand mould manufacture process in lost foam casting. The mould filling with sand and Band compaction by vibration are modelled using spherical … Read more

Analysis of forming of aluminium and magnesium alloys in semi-solid state by advanced computer modelling Krzysztof Sołek1, Andrzej Białobrzeski2, Tomasz Stuczyński3, Zbigniew Mitura1 1Akademia Górniczo-Hutnicza, al. Mickiewicza 30, 30-059, Kraków, Polska. 2lnstytut Odlewnictwa, Zakopiańska 73, 30-418 Kraków, Polska. 3Instytut Metali Nieżelaznych, Oddział Metali Lekkich, Piłsudskiego 19, 32-050 Skawina, Polska. DOI: https://doi.org/10.7494/cmms.2003.3.0042 Abstract: “Metal forming in … 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