Papers

On the forming and fracture limits of sheet metals

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On the forming and fracture limits of sheet metals Antti S. Korhonen1, Timo Manninen2, Jeong-Whan Yoon3 1Department of Materials Science and Engineering, Helsinki University of Technology. 2Outokumpu Stainless Oyj, Tornio Research Center. 3Alcoa Technical Center, Division of Materials Science. DOI: https://doi.org/10.7494/cmms.2009.1.0220 Abstract: The forming and fracture limits of stainless steel and aluminum were studied. Hydraulic … Read more

Failure modelling of friction stir welded joints in tensile tests

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Failure modelling of friction stir welded joints in tensile tests Guido Borino1, Livan Fratini2, Francesco Parrinello1, Antonino Bulgarella2 1University of Palermo, Dipartimento di Ingegneria Strutturale e Geotecnica, Palermo, Italy. 2University of Palermo, Dipartimento di Tecnologia Meccanica, Produzione ed Ingegneria Gestionale, Palermo, Italy. DOI: https://doi.org/10.7494/cmms.2009.1.0205 Abstract: The paper concerns with the mechanical modelling and the finite … Read more

A new method for the evaluation of the yield criteria accuracy

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A new method for the evaluation of the yield criteria accuracy Liana Paraianu, Dorel Banabic Research Centre in Sheet Metal Forming Technologies – CERTETA,Technical University of Cluj-Napoca, C. Daicoviciu 15, 400020 Cluj-Napoca, Romania. DOI: https://doi.org/10.7494/cmms.2009.1.0221 Abstract: The paper presents a test used to estimate the predictive accuracy of a few yield criteria for anisotropic materials. … Read more

Using fuzzy numbers in fatigue reliability estimation

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Using fuzzy numbers in fatigue reliability estimation Tomasz Bednarek1,2, Piotr Prokopowicz2, Włodzimierz Sosnowski1,2 1Institute of Fundamental Technological Research, PAN, Warsaw, Poland. 2Kazimierz Wielki University, Bydgoszcz, Poland. DOI: https://doi.org/10.7494/cmms.2009.1.0206 Abstract: Increasing safety requirements of structures induces necessity of taking into consideration the random nature of variables in the fatigue design. Fatigue analysis of real structures in … Read more

Determination of mechanical properties of the weld zone of tailor-welded blanks

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Determination of mechanical properties of the weld zone of tailor-welded blanks Jerzy Rojek1, Monika Hyrcza-Michalska2, Adam Bokota3, Wiesława Piekarska3 1Institute of Fundamental Technological Research, Warsaw, Poland. 2Politechnika Śląska, Katowice, Poland. 3Politechnika Częstochowska, Częstochowa, Poland. DOI: https://doi.org/10.7494/cmms.2009.1.0222 Abstract: The present paper presents different available methods to determine mechanical properties of the weld zone of tailorwelded blanks … Read more

Nonlocal integral formulation for a plasticity-induced damage model

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Nonlocal integral formulation for a plasticity-induced damage model Filipe X.C. Andrade, Francisco m. Andrade Pires, José M.A. César De Sá, Lucival Malcher IDMEC – Mechanical Engineering Institute,Faculty of Engineering, University of Porto,Rua Dr. Roberto Frias s/n 4200-465 Porto, Portugal. DOI: https://doi.org/10.7494/cmms.2009.1.0207 Abstract: Ductile failure prediction commonly involves the use of the finite element method within … Read more

Investigation on sheet hydroforming of tailor-welded blanks and comparison with conventional deep drawing

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Investigation on sheet hydroforming of tailor-welded blanks and comparison with conventional deep drawing Mahdi Qarakhani1, Abolfazl Masoumi1, Mohammad Habibi Parsa2, Alireza Arayee1 1Department of Mechanical Engineering, Faculty of Engineering 2Department of Metallurgy and Materials Engineering, Faculty of Engineering University of Tehran, P.O.Box 11155/4563. DOI: https://doi.org/10.7494/cmms.2009.1.0223 Abstract: In this investigation, finite element simulations were carried out … Read more

Effect of temperature and strain rate on friction factor during hot deformation of al-mg and al-cu-mg al-alloys

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Effect of temperature and strain rate on friction factor during hot deformation of al-mg and al-cu-mg al-alloys Pavel Petrov1, Denis Gnevashev1, Andrey Dubinchin1, Michael Petrov1, Valentin Solotych2, Jon Wostryck Eiesland3 1Moscow State Technical University “MAMI”, B.Semenovskay str. 38, 107023 Moscow, Russia. 2Technical University of Munich, Faculty of Mechanical Engineering. 3Norwegian University of Science and Technology, … Read more

The numerical determination of contact zone tool and work-pieces in burnishing rolling process

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The numerical determination of contact zone tool and work-pieces in burnishing rolling process Radosław Patyk, Sylwia Patyk, Leon Kukiełka Department of Technical Mechanics and Strength Materials,Faculty of Mechanical Engineering,Koszalin University of Technology, ul. Raclawicka 15 – 17, Koszalin, Poland. DOI: https://doi.org/10.7494/cmms.2009.1.0224 Abstract: This work concerns burnishing rolling the shafts with elastic pressing of burnishing elements. … Read more

Numerical analysis of the influence of a change in the vertebral arteries joint angle on the blood flow

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Numerical analysis of the influence of a change in the vertebral arteries joint angle on the blood flow Krzysztof Jozwik, Damian Obidowski, Maciej Pogorzelski Medical Apparatus Division, Institute of Turbomachinery,,Technical University of Lodz, Lodz, Poland. DOI: https://doi.org/10.7494/cmms.2009.1.0209 Abstract: Cerebral circulation can be regarded as the most important element of blood circulation. Total ischaemia of neurotic … Read more