Month: April 2009

Numerical modeling of bulk metal forming processes with induced strain path change

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Numerical modeling of bulk metal forming processes with induced strain path change Łukasz Madej1, Stanisław Węglarczyk1, Franciszek Grosman2 1Department of Modeling and Information Technology, AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland. 2Department of Process Modelling and Medical Engineering Politechnika Śląska, ul. Krasińskiego 8, 40-019, Katowice, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0236 Abstract: A … Read more

Structuralization of knowledge about casting defects diagnosis based on rough sets theory

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Structuralization of knowledge about casting defects diagnosis based on rough sets theory Stanisława Kluska-Nawarecka1, Dorota Wilk-Kołodziejczyk2, Grzegorz Dobrowolski2, Edward Nawarecki2 1Foundry Research Institute, Cracow, Poland. 2AGH University of Science and Technology, Cracow, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0252 Abstract: The rough information system is applied in order to structuralize knowledge about casting defects and their reasons, which are … Read more

Microstructural changes with selected extrusion variables in plastic deformation of complex-shaped lead alloy

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Microstructural changes with selected extrusion variables in plastic deformation of complex-shaped lead alloy Joseph S. Ajiboye, Babatunde Idirisu Department of Mechanical Engineering, University of Lagos, Lagos, Nigeria. DOI: https://doi.org/10.7494/cmms.2009.2.0237 Abstract: This paper investigates the effects of changing die land length and web to flange ratio on the pressure and surface structures of cold plastic deformation … Read more

Parallel evolutionary optimization in multiscale problems

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Parallel evolutionary optimization in multiscale problems Wacław Kuś1, Tadeusz Burczyński1,2 1Department for Strength of Materials and Computational Mechanics, Silesian University of Technology, Konarskiego 18a, 44-100 Gliwice, Poland. 2Institute of Computer Modelling, Artificial Intelligence Section, Cracow University of Technology, Warszawska 24, 31-155 Kraków, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0253 Abstract: The paper is devoted to optimization in multiscale problems. … Read more

Micro- versus macro- modelling of creep damage

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Micro- versus macro- modelling of creep damage Krzysztof Nowak Cracow University of Technology, ul. Warszawska 24, 31-155 Krakow, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0238 Abstract: In the present paper the continuous approach to model brittle-ductile transition in creep failure phenomenon is replaced by Cellular Automata (CA) model. This allows to back-up this complex phenomenon by relating it to … Read more

Computer measurement systems in research of non-conventional metal forming processes

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Computer measurement systems in research of non-conventional metal forming processes Zdzisław Cyganek, Franciszek Grosman Department of Process Modelling and Medical Engineering, Silesian University of Technology, Krasinskiego 8, Katowice, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0254 Abstract: Severe Plastic Deformation processes are one of the new method of metal forming processes. At present some research in this range is be … Read more

Modeling of microstructure evolution during the rolling by using cellular automata

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Modeling of microstructure evolution during the rolling by using cellular automata Dmytro Svyetlichnyy AGH University of Science and Technology,Al. Mickiewicza 30, 30-059 Kraków, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0239 Abstract: Prediction of microstructure evolution and properties is one of the most significant problems in materials science. The developed model contains two parts: the deformation and the microstructure. Usually, … Read more

Sensitivity analysis of the cellular automata finite element model for the strain localization

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Sensitivity analysis of the cellular automata finite element model for the strain localization Danuta Szeliga, Lukasz Madej AGH University of Science and Technology, al. Mickiewicza 30, 30-059 Kraków, Poland. DOI: https://doi.org/10.7494/cmms.2009.2.0240 Abstract: Application of the sensitivity analysis methods to identify the influence of the multi scale Cellular Automata Finite Element model parameters on the model … Read more

Application of combined discrete/finite element multiscale method for modelling of Mg redistribution during hot rolling of alluminium

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Application of combined discrete/finite element multiscale method for modelling of Mg redistribution during hot rolling of alluminium Michal Krzyzanowski, W. Mark Rainforth Institute for Microstructural and Mechanical Process Engineering,The University of Sheffield S1 3JD, UK DOI: https://doi.org/10.7494/cmms.2009.2.0241 Abstract: Numerical modelling of the stock surface layer formation has been carried out to support simulations of the … Read more

Transient thermal analysis of functionally graded shallow shells by the MLPG

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Transient thermal analysis of functionally graded shallow shells by the MLPG Jan Sladek1, Vladimir Sladek1, Peter Solek2 1Institute of Construction and Architecture, Slovak Academy of Sciences, 84503 Bratislava, Slovakia. 2Department of Mechanics, Slovak Technical University, Bratislava, Slovakia. DOI: https://doi.org/10.7494/cmms.2009.2.0226 Abstract: A meshless local Petrov-Galerkin (MLPG) method is applied to solve problems of Reissner-Mindlin shells under … Read more