Itzhak Green

Professor

Tel: 404-855-0655

itzhak.green@me.gatech.edu

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Professor Itzhak Green Honored By ASME

   

ITZHAK GREEN, D.Sc. (Brief Biography).

 

Professor of Mechanical Engineering
George W. Woodruff School of Mechanical Engineering
Georgia Institute of Technology
Atlanta, GA 30332-0405

 

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 (Georgia Institute of Technology, Atlanta, GA)

Professor, School of Mechanical Engineering (1996-present)

Associate Professor, School of Mechanical Engineering (April 1989-April 1996)

Assistant Professor, School of Mechanical Engineering (March 1985-April 1989)

 

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.

 

 

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).

 

 

Technical Consulting, and Patent Litigation Expert Witness:

 

Scientific Atlanta, Atlanta, GA.
Inpro/Seal, Inc., Rock Island, IL (Patent Litigation Expert Witness).
Georgia Pacific Pump Company, GA.
Bard Urological Division, Covington, GA.
The Torrington Co., Sylvania, GA (Expert Witness – testimony in court).

Stone Container, Savannah, GA.
Schlumberger, Houston, TX – Case 1.

Pratt & Whitney, Hartford, CT.
General Dynamics, Falls Church, VA.
Frost Brown Todd LLC, Cincinnati, OH (Expert Witness – testimony in arbitration).

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

 

 

 

Publications:

 

1.View the complete citation index on View all articles

2.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:

 
  1. Shigley, J.E. and Mischke, C.R., "Mechanical Engineering Design," McGraw-Hill, 2000
  2. Hamrock, B.J., et al., "Fundamentals of Machine Elements," McGraw-Hill, 1999
  3. Norton, R.L., "Machine Design, An Integrated Approach," Prentice-Hall, 1998

 

Invited and Keynote Select Presentations:

 

"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:

 

Life Fellow, STLE

STLE, Seals Technical Committee (Strategic Planning Committee Member); 1985-present
Chair, STLE Honors and Awards Committee; 1998-2002
Associate Editor, STLE Tribology Transactions, 1998 - 2007
Chair, STLE Annual Meeting Program Committee, 1994-2005

Director, STLE Board of Directors, 2004-2007

Chair, STLE Fellows Awards Committee, 2010 – 2018

 

Life Fellow, ASME

 

Associate Editor, Trans. ASME Journal of Tribology, 1988 – 1996
Chair, Executive Committee, ASME Tribology Division, 2002- present

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

 

 

 

Selected Honors and Awards:

 

ASME, Burt L. Newkirk Award, “in recognition of excellent technical papers published in Transactions of ASME,” (October 1986).
Visiting Professor, Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, (Academic Years 1993/4).
Woodruff Faculty Fellow, George W. Woodruff School of Mechanical Engineering, Georgia Institute of Technology. (July 1993-July 1998).
Visiting Professor, Faculty of Mechanical Engineering, Technion - Israel Institute of Technology, (2002).
Society of Tribologists and Lubrication Engineers, the Best Sealing Technology Paper Award (1998 STLE Annual Meeting).
Society of Tribologists and Lubrication Engineers, the 2001 Walter D. Hodson Award (2001 STLE Annual Meeting), with Zou.

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.

Contact Information:

Phone:

(404) 855-0655

Website:

https://scholar.google.com/citations?user=I0ef2JAAAAAJ

E-mail:

itzhak.green@me.gatech.edu

View videos, papers, and documents.

Updated: April 2023

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