Itzhak
Green
ITZHAK GREEN, D.Sc. (Brief Biography). |
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Professor of Mechanical
Engineering |
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EDUCATION 1984 D.Sc.
Mechanical
Engineering
Technion-Israel Institute of Technology 1980 M.Sc.
Mechanical Engineering
Technion-Israel Institute of Technology 1977 B.Sc.
Mechanical Engineering
Technion-Israel Institute of Technology APPOINTMENTS ( Professor, Associate Professor,
Assistant Professor,
EXPERIENCE Dr. Green is an
experienced expert witness. He provides analysis, opinions, and reports to
support litigation and testimony. He is an internationally recognized expert
on machinery, design, rotordynamics, and tribology where he frequently
consults for the industry on his fields of expertise (see list below). Dr. Green has authored and
co-authored more than 150 papers and reports in tribology and design,
primarily in the fields of gas/liquid triboelements design, rotordynamics,
integrated diagnostics, dynamic analysis of mechanical face seals, mechanics
of viscoelastic dampers and seals, finite element analysis of
elastic-viscoelastic vibrating structures, elasto-plastic hemispherical
contact, and computer aided design of machine elements. In 1986 he received the ASME Burt L. Newkirk Award “in
recognition of excellent technical papers published in ASME Transactions.” In 1993 he became a Wolberg
Visiting Professor at the Technion, and at that year he was also appointed as
a Woodruff Faculty Fellow at Georgia Tech. He was awarded the Best Sealing
Technology Paper by STLE-STC
(1988), the STLE Walter D. Hodson
Award (2001), and the STLE Frank P.
Bussick Best Paper Award (2004). Dr. Green is the recipient of two most
distinguished awards from the American
Society of Mechanical Engineers (ASME): (1) the 2006 Machine Design Award
“for outstanding achievements and dedication to excellence in design
education, innovation, service and research,” and (2) the 2021 Mayo D.
Hersey Award in recognition of “distinguished and continued
contributions over a substantial time period to the advancement of the
science and engineering of tribology.” Dr. Green, a Life Fellow of the ASME and the STLE. He served as a Technical
Associate Editor for the ASME Transactions, Journal of Tribology
(1988-94), then served and chaired the STLE
Awards Committee (1998-2002). He chaired the 2005 STLE Annual Meeting Program Committee (1995-2005), and has been
an Associate Editor for STLE, Tribology Transactions (2000-2007), a
Director on the STLE Board
(2004-2007), and the Chair of the Contact Mechanics Technical Committee of ASME Tribology Division (2005-2007).
Dr. Green has served two terms as the Chair of the Executive Committee of the
ASME Tribology Division
(2003-2008). Likewise, he served and chaired the ASME Tribology Division Nominations and Oversight Committee. Dr.
Green has been an instructor and the course administrator for the short
course of Fluid Sealing Technology that was given annually at Georgia Tech.
He also has taught the entire mechanics and design subjects for the
Professional Engineering Refresher Course for the PE Exam. He served on the ASME Design Engineering Division
Leonardo da Vinci Award Committee, chaired the ASME Tribology Division Awards Committee, and chaired the STLE Fellows Committee. He served as
an academic editor for the Journals of Shock and Vibration, and now he serves
in that capacity for two journals: (1) Friction, and (2) Materials. At Georgia Tech Dr. Green
chairs the Tribology Research Area Group and the Rotordynamics Research
Laboratory. |
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Fields of Expertise: Contact Mechanics, Tribology (Friction, Lubrication, and Wear), Rotordynamics, Dynamics and Vibrations, Diagnostics and Prognostics, the Finite-Element Method, Viscoelasticity, and Machine Design (Springs, Bearings, Shafts, Fatigue, Fracture Mechanics, Gears (AGMA Compliance), Clutches, Breaks, Flywheels, and Sealing Technology - Static and Dynamic). |
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Technical Consulting, and Patent Litigation Expert Witness: |
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Scientific Atlanta,
Atlanta, GA. Stone Container, Savannah,
GA. Pratt & Whitney,
Hartford, CT. QuestAir, Vancouver, Canada. Intel Corp., UPSD -
Platform & System Technology, OR. Eaton Aerospace, Actuation
Systems, MI. Porter, Orrison
& Doster, GA (Patent Litigation Expert Witness). Harris, Phillips &
Harris, GA (Mechanical Engineering
Expert Witness) – Case 1. Harris, Phillips &
Harris, GA (Mechanical Engineering
Expert Witness) – Case 2. Schlumberger, Houston, TX
– Case 2. Young Basile Hanlon &
MacFarlane (Patent Litigation
Expert Witness). Gardner Groff Greenwald
& Villanueva (Patent
Litigation Expert Witness) Smith Risley
Tempel Santos (Patent Litigation Expert Witness) Kilpatrick Townsend & Stockton LLP (Patent Litigation Expert Witness) Kirkland & Ellis LLP (Patent Litigation Expert Witness) Susman Godfrey LLP (Patent Litigation Expert Witness) Cislo & Thomas LLP (Patent Litigation Expert Witness) K&L Gates LLP (Mechanical Engineering Expert Witness) - Current |
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Publications: |
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1.View the complete citation index on2.Representative articles from recent years:Varney, P., and Green, I., “Crack Detection in
a Rotor Dynamic System by Vibration Monitoring - Part II: Extended Analysis
and Experimental Results,” ASME
Trans., Journal of Gas Turbines and Power, Vol. 134, (November 2012), 112501-10. Varney, P., and Green, I., “Rotordynamic Crack
Diagnosis: Distinguishing Crack Depth and Location,” ASME Trans., Journal of Gas Turbines and
Power, Vol. 135, (November
2013), 112101-8. Smyth, P., Green, I., Jackson, R., Hanson, R.R.,
“Biomimetic Model of Articular Cartilage Based on In Vitro
Experiments,” Journal of
Biomimetics, Biomaterials, and Biomedical, Engineering, Vol. 21 (August
2014), 75-91. Varney, P., and Green, I., “Rotordynamic
Analysis Using the Complex Transfer Matrix: An Application to Elastomer
Support Using the Viscoelastic Correspondence Principle,” Elsevier, Journal of Sound and Vibration,
Vol. 333, No. 23, (November 2014),
6258-6272. Varney, P., and Green, I., “Nonlinear
Phenomena, Bifurcations, and Routes to Chaos in an Asymmetrically Supported
Rotor-Stator Contact System,” Journal
of Sound and Vibration, Elsevier, Vol.
336, No. 3 (February 2015), 207-226. Smyth, P. and Green, I., “Fractional Calculus
Model of Articular Cartilage Based on Experimental Stress-Relaxation, to
Mechanics of Time-Dependent Materials,” J. of Mechanics of Time-Dependent Materials, Springer, Vol. 19,
No. 2, (March 2015), 209-228. Varney, P., and Green, I., “Rotordynamic
Analysis of Rotor-Stator Rub Using Rough Surface Contact,” ASME Trans., Journal of Acoustics and
Vibrations, Vol. 138, No. 2 (April 2016), 021015-1 to 021015-9. Varney, P., and Green, I., “Impact Phenomena
in Non-Contacting Mechanical Face Seals,” ASME Trans., Journal of Tribology, Vol. 139, (March 2017), 022201-1 to 022201-8.
DOI:10.1115/1.4033366. Smyth, P., Varney, P., and Green, I., “A Fractional
Calculus Model of Viscoelastic Stator Supports Coupled with Elastic
Rotor-stator Rub,” ASME Trans.,
Journal of Tribology, Vol. 138, (October 2016), 041101-1 to 041101-8. Varney, P., and Green, I., “Rough Surface
Contact of Curved Conformal Surfaces: An Application to Rotor-Stator
Rub,” ASME Trans., Journal of
Tribology, Vol. 138, (October 2016), 041401-1 to 041401-7. Smyth, P., and Green, I., “Analysis of Coupled
Poroviscoelasticity and Hydrodynamic
Lubrication,” Tribology Letters,
(November 17, 2016), TRIL-D-16-00380, DOI:
10.1007/s11249-016-0787-3. Varney, P., and Green, I., “Dynamic Modeling
of an Eccentric Face Seal Including Coupled Rotordynamics, Face Contact, and
Inertial Maneuver Loads,” IMechE,
Part J: Journal of Engineering
Tribology, JET-16-0371, DOI: 10.1177/1350650117727230, 1-17. Varney, P., and Green, I., “Comparing the Floquet Stability of Open and Breathing Fatigue Cracks in
an Overhung Rotordynamic System,” Journal
of Sound and Vibration, Elsevier, (July 2017), 314-330. Trinh, K.E., Ramos-Moore, E., Green, I., Pauly, C., Zamanzade, M., Mücklich, F., “Topographical
and Microstructural Effects of Tin-coated Copper Electrical Connectors
Modified by Laser Surface Texturing under Load Cycling,” IEEE Transactions on Components,
Packaging and Manufacturing Technology, Vol. 7, No. 4, (April 2017). Varney, P., and Green, I., “Comparing the Floquet Stability of Open and Breathing Fatigue Cracks in
an Overhung Rotordynamic System,” Journal
of Sound and Vibration, Elsevier, (July 2017), 314-330. Reinert,
L., Green, I., Gimmler, S., Mücklich, F., and
Suárez, S., “Tribological Behavior of Self-Lubricating Carbon
Nanoparticle Reinforced Metal Matrix Composites,” Wear, Elsevier, 408-409, (2018), 72-85. Yang, H., and Green,
I., “A Fretting Finite Element
Investigation of a Plane-Strain Cylindrical Contact of Inconel 617/Incoloy 800h at Room and High Temperatures” Proc IMechE Part J: J Engineering
Tribology, 1-17, DOI: 10.1177/1350650118788755 (June 2018). Yang, H., and Green, I., “An Elasto-Plastic
Finite Element Study of Displacement-Controlled Fretting in a Plane-Strain
Cylindrical Contact,” ASME
Trans., Journal of Tribology, Vol. 140,
(July 2018), 041401-1 - 041401-11. Smyth, P., and Green, I., “Storage and Loss
Characteristics of Coupled Poroviscoelastic and Hydrodynamic Systems for
Biomimetic Applications,” ASME
Trans., Journal of Tribology, Vol. 140, (July 2018), 041703-1 - 041703-8. Yang, H., and Green,
I., “Fretting Wear Modeling of Cylindrical Line Contact in Plane-strain
Borne by the Finite Element Method,” ASME Trans., Journal of Applied
Mechanics, Vol. 86, (June 2019),061012-1-1 to 061012-1 12; doi:10.1115/1.4043074. Yang, H., and Green,
I., “A Fretting Finite Element
Investigation of a Plane-Strain Cylindrical Contact of Inconel 617/Incoloy 800h at Room and High Temperatures,” Proc. IMechE Part J: Journal of
Engineering Tribology, Vol. 233, No.
4, (2019), 553-569, DOI: 10.1177/1350650118788755. Yang, H., and Green,
I., “An Elastoplastic Finite
Element Study of Cylindrical Plane-strain Contact for Steel/Steel and
Inconel617/Incoloy800H Undergoing Unidirectional Sliding,” Proc. IMechE Part J: Journal of
Engineering Tribology, Accepted manuscript (May 2019), JET-19-0017, DOI:
10.1177/1350650119855594. Green,
I., “Metrology and Numerical Characterization of Random Rough Surfaces
- Data Reduction via an Effective Filtering Solution,” Proc. IMechE Part J: Journal of
Engineering Tribology, Accepted manuscript (November 2019), 1-18, DOI:
10.1177/1350650119885281. Green,
I., “Exact Spectral Moments and Differentiability of the
Weierstrass-Mandelbrot Fractal Function,” ASME Trans., Journal of Tribology, Vol. 142, (April
2020), 041501-1 to 041501-8;
doi:10.1115/1.4045452. Yang, H., and Green,
I., "Adhesion Modeling
by Finite Elements of Three-dimensional Fretting," Tribology International, Vol. 156 (2021) 106802, doi:10.1016/j.triboint.2020.106802. Yang, H., and Green,
I., "An Analytical
Solution for the Initiation and Early Progression of Fretting Wear in
Spherical Contacts," ASME Trans.,
Journal of Tribology,
accepted manuscript (June 21, 2021), doi:10.1115/1.4051585. Yang, H., and Green, I., “Mitigation Schemes
for the Reduction of Fretting Wear and Fatigue,” IEEE Proceedings of the 66th Holm Conference on Electrical Contacts
(HOLM 2021, paper 72). Green, I., “The
Prediction of the Coefficient of Restitution Between Impacting Spheres and
Finite Thickness Plates Undergoing Elastoplastic Deformations and Wave
Propagation,” Journal of
Nonlinear Dynamics, Springer, doi.org/10.1007/s11071-022-07522-3, (May
24, 2022). |
Article: Wileman, J., Choudhury, M., and
Green, I., "Computation of Member Stiffness in Bolted Connections
[1]," Trans. ASME, Journal of
Mechanical Design, Vol. 113, No. 4 (December 1991) 432-437. [1] Adopted in numerous textbooks, including: |
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Invited and Keynote
Select Presentations: |
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"Constitutive Equations of Viscoelastic
Materials and Finite Element Formulation of Vibrating Elastic-Viscoelastic
Structures," Technion - Israel Institute of Technology, Haifa, Israel
(14 December 1992). "Rotordynamics of a Flexibly Mounted
Rotor Face Seal Riding on a Flexible Shaft - An Analytical and Experimental
Investigation," Technion - Israel Institute of Technology, Haifa, Israel
(June 1994). "On the Stability of Gas Lubricated
Triboelements Using the step Jump Method," The Center for Surface
Engineering and Tribology, Georgia Tech, Atlanta (March 19, 1996). “Integrated Diagnostics for
Mechanical Systems,” 9th Annual UTC Engineering Conference &
Technology Expo, UTECA, Cromwell, CT, (April 22, 1998). “Friction Induced Higher Harmonic
Oscillations in a Noncontacting FMR Mechanical Face Seal Test Rig,” 9th
Annual UTC Engineering Conference & Technology Expo, UTECA, Cromwell, CT,
(April 22, 1998). “Monitoring, Control, and Reduction
of Sub or Higher Harmonic Oscillations in Mechanical Face Seals,” 9th
Annual UTC Engineering Conference & Technology Expo, UTECA, Cromwell, CT,
(April 22, 1998). “Feasibility of Contact Detection and
Elimination in a Mechanical Face Seal,” 10th Annual UTC Engineering
Conference & Technology Expo, UTECA, Cromwell, CT, (April 21, 1999). “Contact Elimination in a Mechanical
Face Seal Via Active Controls,” 10th Annual UTC Engineering Conference
& Technology Expo, UTECA, Cromwell, CT, (April 21, 1999). “New Numerical and Semi-Analytical
Formulations for the Dynamic Analysis of Gas Lubricated Triboelements,”
Technion-Israel Institute of Technology (June 2001). “Real-Time Diagnostics of Mechanical
Seals, and Rotordynamics of Cracked Shafts,” Israeli Navy Shipyard
(July 2003). “A Finite Element Study of
Elasto-plastic Hemispherical Contact Against a Rigid Flat,” Department
of Materials and Interfaces, Weizmann Institute of Science, Invited Departmental
Seminar, (July 13, 2005). “Elasto-plastic Contact
Mechanics,” Department of Mechanical and Industrial Engineering,
University of Illinois, Champaign-Urbana, Invited Departmental Seminar,
(November 15, 2005). “Real-Time Diagnostics and Control of
a Mechanical Seal and Rotordynamics of a Cracked Shaft,” Auburn
University, Auburn, Alabama, Invited Departmental Seminar, (October 7, 2005). “A Finite Element Analysis of Sliding
Asperity Contact with Electromagnetic Effects” Auburn University,
Auburn (April 17, 2008). “Modeling of an Electromagnetic
Launcher: Structure & Tribological Interface” University of
Arkansas (January 23, 2008). “Opportunities in Research and
Education in Fluid Sealing Technology”, Keynote Presentation at the
Fluid Leak Management Users Group, Chicago, IL, (August 24-27, 2009). “Past, Current, and
Future Research of Transient Phenomena of Mechanical Face Seals”,
Scheduled, Keynote Presentation at the STLE Annual Meeting, Detroit, MI, (May
2013). "Rotordynamics,
Failure Diagnosis, and Control of Rotating Machine Elements" Texas
A&M University, Dept. Mechanical Engineering, College Station, TX,
(October 30, 2013). “Tribology
in an Electromagnetic Launcher:
Tribological Interface & Structure,” EUSMAT, Dept. Materials
Science & Engineering, Saarland University, Germany, (March 18, 2014). “Nondestructive
Testing in Real-Time of a Rotordynamic System Riding on a Cracked
Shaft,” The Fraunhofer Institute, Saarbrucken, Germany, (March 26,
2014). “Using
Mechanical Face Seal Vibration to Detect a Breathing Rotor Crack,”
the 2017 STLE Annual Meeting, Atlanta, GA, May 2017. “Influence of Coupled Rotordynamics on Mechanical Face Seal
Performance”, the 2017 STLE Annual Meeting, Atlanta, GA, May
2017. “Numerical Methods Problems in
Contact of Rough Surfaces,” ASME-SES Joint Conference 2017, Boston,
July 28, 2017, Symposium VIII-D. “Diagnostics of Rotordynamics
Systems,” Auburn University, Auburn, Alabama, Department of Mechanical
Engineering, Invited Departmental Seminar, (September 21, 2018). “Diagnostics of Rotordynamics
Systems,” TMD Conference, Rice University, Houston, Texas, Conference
Keynote Presentation, (July 31, 2019). |
Professional Service, Membership and Activities: |
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Life Fellow, STLE |
STLE,
Seals Technical Committee (Strategic Planning Committee Member); 1985-present Director, STLE Board of Directors, 2004-2007 Chair, STLE Fellows Awards Committee, 2010 – 2018 |
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Life Fellow, ASME |
Associate Editor, Trans. ASME
Journal of Tribology, 1988 – 1996 Chair, Contact Mechanics Technical
Committee, ASME Tribology Division,
2002-2007 Chair, Nominations and
Oversight Committee, ASME Tribology
Division, 2009 - 2014 ASME
Design Engineering Division, Leonardo Da Vinci Awards Committee, 2010 –
present Chair, Awards Committee, 2014 - 2018 |
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Selected Honors and Awards: |
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ASME, Burt
L. Newkirk Award, “in recognition of excellent technical papers
published in Transactions of ASME,”
(October 1986). Society of Tribologists and
Lubrication Engineers, the Franck P. Bussick Award (2004 STLE Annual Meeting). ASME,
Machine Design Award, “for outstanding achievements and dedication to
excellence in design education, innovation, service and research,”
(September 2006). The STLE 2009 Captain Alfred E. Hunt Memorial Award, for authoring the best paper dealing with lubrication or an allied field, and published in STLE Tribology Transactions. To be given at the IJTC October 2009. |
Phone:
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(404) 855-0655
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Website:
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https://scholar.google.com/citations?user=I0ef2JAAAAAJ
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E-mail:
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itzhak.green@me.gatech.edu
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View videos,
papers, and documents.
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Updated: April 2023
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