Tufts University  |  School of Engineering  |  Find People  |  Give  | 
   

People



Contact Info:
Anderson Hall, Room 222
Tufts University
Medford, MA 02155

Tel: 617.627.3238
Fax: 617.627.3058
Email Professor

Robert Greif
Professor Emeritus, Department of Mechanical Engineering

Education

Ph.D., M.S. (Mechanical Engineering), Harvard University, 1963, 1959
B.M.E. (cum laude), New York University, 1958

Research

Prof. Greif's research activities and interests are mainly in Applied Mechanics. These areas encompass structural design for dynamic loads, composite materials, vehicle dynamics, fracture mechanics, biomechanics and biomedical applications.

Prof. Greif is actively working on vehicle dynamics research, funded by the FRA through association with the U.S.-D.O.T. Volpe Center in association with mechanical engineer Brian Marquis. In particular, research work is aimed at continually improving railroad speed and safety on the Northeast corridor between Boston and Washington, D.C. High speed railroad truck suspension design involves many fascinating problems in advanced dynamics, vibration and control.

Prof. Greif has collaborated with Prof. Saigal of Tufts University for years on materials research. This work includes characterizing the constitutive relations for glassy and semi-crystalline polymers. In the area of composite materials, research has been done on the impact behavior of graphite/epoxy structures and also core sandwich polymeric enclosures. These studies include theoretical and FEA analysis coupled with experimental verification.

Other research activities include passive damping of systems using bonded piezocomposites. Recent research has also involved application of ultrasonic techniques. One area, in collaboration with Prof. Saigal, involves ultrasonic welding techniques for electronic packaging components for transistor applications.

Background

Professor Greif joined Tufts in 1967. He was Chairman of the Department of Mechanical Engineering from 1981- 1989. Prior to his time at Tufts he was a Senior Staff Scientist at Avco Corp. He has consulted for many companies, with two longstanding positions with Stone and Webster (nuclear power applications) and then with the U.S.-D.O.T. Volpe Transportation Center (aging aircraft, high-speed rail). Prof. Greif is a Fellow of the ASME and an Associate Fellow of AIAA.

Professional Positions

2008-present Professor Emeritus of Mechanical Engineering, Tufts University
1967-2008 Assistant (1967-70), Associate (1970-1978), and Full Professor (1978-2008), Mechanical Engineering, Tufts University
1981-1989 Chairman, Mechanical Engineering Department, Tufts University
1988 National Research Council, Sr. Research Associate, NASA Langley Research Ctr.
1981 Visiting Scholar in Solid Mechanics, Harvard University
1974 Visiting Research Fellow, University of Sussex, Sussex, England
1963-1967 Sr. Staff Scientist, Avco Corp., Missile Systems, Wilmington, MA

Honors and Awards

1997 Fellow, ASME (American Society of Mechanical Engineers)
1985 Associate Fellow, AIAA (American Inst. Of Aeronautics and Astronautics)

Other Professional and Consulting Affiliations

1977-present US-DOT Volpe Center (aging aircraft, high-speed rail).
1971-1978 Stone and Webster Engineering Corp. (nuclear power)
1969-1970 Army Materials and Mechanics Research Center, Watertown, MA

Recent Publications

"A Methodology for the Modeling of Forced Dynamical Systems From Time Series Measurements Using Time-Delay Neural Networks", J. Zolock and R. Greif, Journal of Vibrations and Acoustics, Vol. 131, February 2009.

"Finite Element Analysis of Ballistic Impact of Military Helmets", L. Calefato, A. Saigal and R. Greif, 7th International Conference on Composite Science and Technology, Sharjah, United Arab Emirates, January 2009.