cmms

Influence of initial state and chemical composition on the hardening and softening kinetics in hot metal forming

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Influence of initial state and chemical composition on the hardening and softening kinetics in hot metal forming Philipp Hagemann, Rudolf Kawalla, Werner Jungnickel, Matthias Schmidtchen Technische Universität Bergakademie Freiberg – Institut für Metallformung, Freiberg, Germany. DOI: https://doi.org/10.7494/cmms.2011.1.0327 Abstract: Materials in hot metal forming are suspended to a series of plastic deformation until they obtain their … Read more

From discrete particles to solids – about sintering and self-healing

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From discrete particles to solids – about sintering and self-healing Stefan Luding Multi Scale Mechanics, CTW, UTwente, POBox 217, 7500AE Enschede, NL. DOI: https://doi.org/10.7494/cmms.2011.1.0312 Abstract: In this review, particulate materials are studied using the Discrete Element Method (DEM), where the particles keep their identity throughout. Loose particles can sinter due to time-, stress- or temperature-dependent … Read more

Guidelines for the determination of tube forming limits based on tensile, bulge and elliptical tests

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Guidelines for the determination of tube forming limits based on tensile, bulge and elliptical tests Lander Galdos, Eneko Sáenz De Argandoña, Carlos García Mechanical and Manufacturing Department, Mondragon University, Spain. DOI: https://doi.org/10.7494/cmms.2011.1.0328 Abstract: Tube hydroforming is a well-known technology able to manufacture complicated geometrical parts with high mechanical properties. Furthermore, the developments of new and … Read more

Application of the fractional oscillator equation to simulations of granular flow in a silo

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Application of the fractional oscillator equation to simulations of granular flow in a silo Tomasz Blaszczyk2, Ewa Kotela1, Jacek Leszczynski1 1Czestochowa University of Technology, Department of Heating, Ventilation and Air Protection ul. Dabrowskiego 73, 42-200 Czestochowa, Poland.2Czestochowa University of Technology, Institute of Mathematics ul. Dabrowskiego 73, 42-200 Czestochowa, Poland. DOI: https://doi.org/10.7494/cmms.2011.1.0313 Abstract: In this paper … Read more

Mechanical and metallurgical properties of titanium alloy friction stir welded butt joints

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Mechanical and metallurgical properties of titanium alloy friction stir welded butt joints Livan Fratini, Gianluca Buffa Dipartimento di Ingegneria Industriale,Università di Palermo Viale delle Scienze. DOI: https://doi.org/10.7494/cmms.2011.1.0329 Abstract: Friction Stir Welding (FSW) is a solid state welding process patented in 1991 by TWI, initially adopted to weld aluminum alloys, is now being successfully used also … Read more

Discrete element simulation of powder sintering

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Discrete element simulation of powder sintering Jerzy Rojek1, Katarzyna Pietrzak1,2, Marcin Chmielewski2, Dariusz Kaliński2, Szymon Nosewicz1 1Institute of Fundamental Technological Research, Polish Academy of Sciences ul. Pawińskiego 5B, 02-106 Warszawa.2Institute of Electronic Materials Technology ul. Wólczyńska 133, 01-919 Warszawa. DOI: https://doi.org/10.7494/cmms.2011.1.0314 Abstract: This paper presents numerical modelling of powder sintering. The numerical model introduced in … Read more

Numerical model of a tig welding process for the aviation industry, including analysis of the heat transfer

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Numerical model of a tig welding process for the aviation industry, including analysis of the heat transfer Andrzej Kuźniar1, Paweł Rygiel1, Stanisław Dudek1, Antoni Gnot1, Tadeusz Gancarczyk1, Konrad Perzyński2 1“WSK “”PZL – Rzeszów”” S.A., ul. Hetmańska 120, 35-078 Rzeszów, Poland”.2Department of Applied Computer Science and Modeling, Akademia Górniczo-Hutnicza, al. Mickiewicza 30, 30-059, Kraków, Poland. DOI: … Read more

Computer modeling of pneumatic formation of superthin fibres

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Computer modeling of pneumatic formation of superthin fibres Leszek Jarecki, Slawomir Blonski, Andrzej Zachara, Anna Blim Institute of Fundamental Technological Research, Polish Academy of Sciences, Pawinskiego 5B, 02-106 Warsaw, Poland. DOI: https://doi.org/10.7494/cmms.2011.1.0315 Abstract: Dynamics of a novel pneumatic process of superthin fibres formation from polymer melts in supersonic air jets in the Laval nozzle is … Read more

Model of convective heat transfer in keyhole mode laser welding

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Model of convective heat transfer in keyhole mode laser welding Aleksander Siwek, Jacek Rońda, Krzysztof Banaś AGH University of Science and Technology, Faculty of Metals Engineering and. DOI: https://doi.org/10.7494/cmms.2011.1.0331 Abstract: Article applies a model of welding with high-power laser beam. As a result of heating the material in the area of a laser beam creates … Read more

The MLPG analysis of crack problems in magnetoelectroelastic solids

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The MLPG analysis of crack problems in magnetoelectroelastic solids Jan Sladek, Vladimir Sladek Institute of Construction and Architecture, Slovak Academy of Sciences, 84503 Bratislava, Slovakia. DOI: https://doi.org/10.7494/cmms.2011.1.0316 Abstract: A meshless method based on the local Petrov-Galerkin approach is applied for boundary value problems with cracks in magnetoelectroelastic solids. A unit step function is used as … Read more