BULETINUL INSTITUTULUI POLITEHNIC DIN IA I Publicat de UNIVERSITATEA TEHNIC GHEORGHE ASACHI DIN IA I Tomul LVII (LXI) Fasc. 4 Sec ia CONSTRUC II DE MA INI 2011 Editura POLITEHNIUM
ISSN 1011-2855
BULETINUL INSTITUTULUI POLITEHNIC DIN IA I Publicat de UNIVERSITATEA TEHNIC GHEORGHE ASACHI, IA I Tomul LVII (LXI) Fasc. 4 Sec ia CONSTRUC II DE MA INI 2011
BULETINUL INSTITUTULUI POLITEHNIC DIN IA I PUBLISHED BY GHEORGHE ASACHI TECHNICAL UNIVERSITY OF IA I Editorial Office: Bd. D. Mangeron 63, 700050, Ia i, ROMANIA Tel. 40-232-278683; Fax: 40-232-237666; e-mail: polytech@mail.tuiasi.ro Editorial Board President: Prof. dr. eng. Ion Giurm, Member of the Academy of Agricultural Sciences and Forest, Rector of the Gheorghe Asachi Technical University of Ia i Editor-in-Chief: Prof. dr. eng. Carmen Teodosiu, Vice-Rector of the Gheorghe Asachi Technical University of Ia i Honorary Editors of the Bulletin: Prof. dr. eng. Alfred Braier, Prof. dr. eng. Hugo Rosman, Prof. dr. eng. Mihail Voicu, Corresponding Member of the Romanian Academy, President of the Gheorghe Asachi Technical University of Ia i Editors in Chief of the MACHINE CONSTRUCTION Section Prof. dr. eng. Radu Ib nescu, Assoc. Prof. dr. eng. Aristotel Popescu Honorary Editors: Prof. dr. eng. Gheorghe Nagî, Prof. dr. eng. Cezar Opri an Associated Editor: Prof. dr. eng. Eugen Axinte Editorial Advisory Board Prof. dr. eng. Nicu or Amariei, Gheorghe Asachi Prof. dr. eng. Noura -Barbu Lupulescu, University Transilvania of Bra ov, Romania Assoc.Prof.dr.eng. Aristomenis Antoniadis, Technical Prof. dr. eng. Francisco Javier Santos Martin, University of Crete, Greece University of Valladolid, Spain Prof. dr. eng. Virgil Atanasiu, Gheorghe Asachi Prof. dr. eng.fabio Miani, University of Udine, Italy Prof. dr. eng. Manuel San Juan Blanco, University of Prof. dr. eng.mircea Mihailide, Gheorghe Asachi Valladolid, Spain Prof. dr. eng. Petru Berce, Technical University of Cluj Prof. dr. eng. Sevasti Mitsi, Aristotle University of Napoca, Romania Thessaloniki Salonic, Greece Prof. dr. eng. Ion Bostan, Technical University of Prof. dr. eng. Gheorghe Nagî, Gheorghe Asachi Chi in u, Repablic of Moldova Prof. dr. eng. Walter Calles, Hochschule für Technik und Prof. dr. eng.vasile Necul iasa, Gheorghe Asachi Wirtschaft des Saarlandes, Saarbrücken, Germany Prof. dr. eng. Doru C l ra u, Gheorghe Asachi Prof. dr. eng. Dumitru Olaru, Gheorghe Asachi Prof. dr. eng. Francisco Chinesta, Ecole Centrale de Prof. dr. eng. Cezar Opri an, Gheorghe Asachi Nantes, France Assoc.Prof.dr.eng. Conçalves Coelho, University Nova of Prof. dr. eng. Juan Pablo Contreras Samper, Lisbon, Portugal University of Cadiz, Spain Assoc.Prof.dr.eng. Mircea Cozmînc, Gheorghe Asachi Prof. dr. eng.loredana Santo, University Tor Vergata, Rome, Italy Prof. dr. eng. Spiridon Cre u, Gheorghe Asachi Prof. dr. eng.cristina Siligardi, University of Modena, Italy Prof. dr. eng. Gheorghe Dumitra cu, Gheorghe Asachi Prof. dr. eng.fernando José Neto da Silva, University of Aveiro, Portugal Prof. dr. eng. C t lin Fetec u, University Dun rea de Prof. dr. eng. Filipe Silva, University of Minho, Portugal Jos of Gala i, Romania Prof. dr. eng. Mihai Gafitanu, Gheorghe Asachi Prof. dr. eng. Lauren iu Sl tineanu, Technical University of Ia i, Romania Prof. dr. eng. Radu Gaiginschi, Gheorghe Asachi Lecturer dr.eng. Birgit Kjærside Storm, Aalborg Universitet Esbjerg, Denmark Prof.dr.ir.Dirk Lefeber, Vrije Universiteit Brussels, Belgium Prof. dr. eng. Ezio Spessa, Politecnico di Torino, Italy Prof. dr. eng.dorel Leon, Gheorghe Asachi Technical Prof. dr. eng. Alexei Toca, Technical University of University of Ia i, Romania Chi in u, Repablic of Moldova Prof. dr. eng.james A. Liburdy, Oregon State University, Prof. dr. eng.roberto Teti, University Federico II, Corvallis, Oregon, SUA Naples, Italy Prof. dr. eng. dr. H.C. Peter Lorenz, Hochschule für Prof. dr. eng.hans-bernhard Woyand, Bergische Technik und Wirtschaft, Saarbrücken, Germany University Wuppertal, Germany