BULLETIN OF THE POLYTECHNIC INSTITUTE OF JASSY
Buletinul Institutului Politehnic din Iasi
abridged as Bul. Inst. Polit. Iasi

published by

THE TECHNICAL UNIVERSITY “GHEORGHE ASACHI” OF JASSY
Address: Bd. D. I. Mangeron 67, 700050 Iasi, Romania
Phone: +40232278683/2521
E-mail: simonasimionescu@yahoo.uk.co
adi_rotaru2005@yahoo.com

Editorial Board of the Machine Manufacturing (Machine Construction) Section

Editorial Board

President: Prof. dr. eng. Ion Giurma, Rector of the
“Gheorghe Asachi” Technical University of Iasi
Editor-in-Chief: Prof. dr. eng. Carmen Teodosiu, Vice-Rector of the
“Gheorghe Asachi” Technical University of Iasi
Honorary Editors of the Bulletin: Prof. dr. eng. Hugo Rosman
Prof. dr. eng. Alfred Braier

Editors in Chief of the MACHINE CONSTRUCTIONS Section
Editors: Prof.dr.eng. Radu Ibanescu
Assoc. Prof.dr.eng. Aristotel Popescu

Honorary Editors: Prof. dr. eng. Gheorghe Nagît, Prof. dr. eng. Cezar Oprisan
Associated Editor: Prof.dr. eng. Eugen Axinte

Editorial Advisory Board

Prof. dr. eng. Nicusor Amariei, Technical University of Iasi, Romania

Prof. dr. eng. Nouras-Barbu Lupulescu, University Transilvania of Brasov, Romania
Assoc.Prof.dr.eng. Aristomenis Antoniadis, Technical University of Crete, Greece

Prof. dr. eng. Francisco Javier Santos Martin, University of Valladolid, Spain
Prof. dr. eng. Virgil Atanasiu, Technical University of Iasi, Romania

Prof. dr. eng.Fabio Miani, University of Udine, Italy
Prof. dr. eng. Manuel San Juan Blanco, University of Valladolid, Spain

Prof. dr. eng.Mircea Mihailide, Technical University of Iasi, Romania
Prof. dr. eng. Petru Berce, Technical University of Cluj Napoca, Romania

Prof. dr. eng. Sevasti Mitsi, Aristotle University of Thessaloniki Salonic, Greece
Prof. dr. eng. Ion Bostan, Technical University of Chisinau, Repablic of Moldova

Prof. dr. eng. Gheorghe Nagît, Technical University of Iasi, Romania
Prof. dr. eng. Walter Calles, Hochschule für Technik und Wirtschaft des Saarlandes, Saarbrücken, Germany

Prof. dr. eng.Vasile Neculaiasa, Technical University of Iasi, Romania
Prof. dr. eng. Doru Calarasu, Technical University of Iasi, Romania

Prof. dr. eng. Dumitru Olaru, Technical University of Iasi, Romania
Prof. dr. eng. Francisco Chinesta, Ecole Centrale de Nantes, France

Prof. dr. eng. Cezar Oprisan, Technical University of Iasi, Romania
Assoc.Prof.dr.eng. Conçalves Coelho, University Nova of Lisbon, Portugal

Prof. dr. eng. Juan Pablo Contreras Samper, University of Cadiz, Spain
.Prof.dr.eng. Mircea Cozmînca, Technical University of Iasi, Romania

Prof. dr. eng.Loredana Santo, University „Tor Vergata”, Rome, Italy
Prof. dr. eng. Spiridon Cretu, Technical University of Iasi, Romania

Prof. dr. eng.Cristina Siligardi, University of Modena, Italy
Prof. dr. eng. Gheorghe Dumitrascu, Technical University of Iasi, Romania

Prof. dr. eng.Fernando José Neto da Silva, University of Aveiro, Portugal
Prof. dr. eng. Catalin Fetecau, University „Dunarea de Jos” of Galati, Romania

Prof. dr. eng. Filipe Silva, University of Minho, Portugal
Prof. dr. eng. Mihai Gafitanu, Technical University of Iasi, Romania

Prof. dr. eng. Laurentiu Slatineanu, Technical University of Iasi, Romania
Prof. dr. eng. Radu Gaiginschi, Technical University of Iasi, Romania

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, Technical University of Iasi, Romania

Prof. dr. eng. Alexei Toca, Technical University of Chisinau, Repablic of Moldova
Prof. dr. eng.James A. Liburdy, Oregon State University, Corvallis, Oregon, SUA

Prof. dr. eng.Roberto Teti, University „Federico II”, Naples, Italy
Prof. dr. eng. dr. H.C. Peter Lorenz, Hochschule für Technik und Wirtschaft, Saarbrücken, Germany

Prof. dr. eng.Hans-Bernhard Woyand, Bergische University Wuppertal, Germany