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 Expert  724861

Expert in Vibration Analysis, Mechanical Failure Analysis, Accident Reconstruction, Injury Biomechanics


Available for your Consulting and Expert Witness Needs

Arizona (AZ)
USA
Education Work History Career AccomplishmentsPublicationsConsulting Services Expert Witness

Summary of Expertise:

Listed with other top experts in: 

Expert has extensive experience with the modeling and analysis of complex mechanical systems that incorporate articulated joints and that involve large and high rates of rotation. He has used angular momentum concepts to analyze the motion of falling cats as well as momentum wheels in space applications.

Expert has applied his expertise in dynamics, mechanics of solids, and biomechanics to accident reconstruction and injury analysis and prediction in low-speed vehicle collisions. He has written detailed analysis reports for a variety of plaintiff and defendant side clients including various law firms, the City of Tucson, and a major national insurance company.

Expert has extensive experience and expertise in the use of the ANSYS simulation software. He has regularly taught a course in finite element methods using ANSYS at the Expert's University. He has used ANSYS in a variety of industrial consulting projects for structural and dynamics analysis. Most of his work has focused on models based on linear materials, linear strains. He has also used ANSYS extensively for modal, harmonic, and transient analysis of vibration problems. Recently he used ANSYS for the thermal analysis of an electronics package for an upstart company.

Expert's work in the analysis of simple structures may involve the use of Castigliano's theorem and virtual work concepts.

Expert's work in the analysis of structures often involves checks using simplified models or equivalent systems, which may involve calculations of basic quantities such as bending moments, linear and angular momenta and mechanical energy. The methods used in such basic model analyses involve Newtonian mechanics, classical dynamics, dynamic force analysis, kinematics, kinetics, rigid-body dynamics, strain and stress analysis, stress modeling, scalar, vector, and complex analysis, and virtual work concepts.

Expert has a strong background in vibration analysis and modeling and has taught various courses on the subject at the Expert's University for many years. His expertise spans single and multi-degree-of-freedom systems, discrete and continuous systems, finite-element methods, modal and harmonic analysis, and three-dimensional structures. He has performed consulting work on these topics for various local and national companies. He uses the Matlab and ANSYS packages extensively for these analyses.

Expert has extensive experience and advanced expertise in the use of the Matlab mathematical software package. He has used the package for various complex numerical analyses projects as well as for the derivation of equations of motion using the Symbolic Toolbox of the package. He has also used the Optimization Toolbox of the package extensively in various mathematical models of complex multivariable systems. Expert can also use the Simulink and SimMechanics toolboxes of the package for friendly graphical-user interfaces and easy-to-understand models.

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angular momentum

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linear momentum

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mechanical system

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rigid-body dynamics

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spatial translation

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dynamic force analysis

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mechanical failure

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injury reconstruction

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crash analysis

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accident reconstruction

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ANSYS software

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finite element analysis software

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mechanical system dynamic response simulation

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stress modeling

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structural analysis

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mechanical stress

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finite element analysis

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Castigliano's theorem

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virtual work

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bending moment

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classical dynamics

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equivalent system

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Newtonian mechanics

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scalar quantity

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static balance

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strain analysis

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stress analysis

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vector quantity

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elastic modulus

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vibration modal analysis

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vibration modeling

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elastic vibration

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harmonic analysis

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degree of freedom

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Matlab

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mathematical modeling

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mechanical system computer-based simulation

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numerical modeling

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three-dimensional model

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numerical analysis


Show Secondary and Basic Areas of Expertise
Localities:
Expert may consult nationally and internationally, and is also local to the following cities: Phoenix, Arizona;  Tucson, Arizona;  Mesa, Arizona;  Glendale, Arizona;  Scottsdale, Arizona;  Chandler, Arizona;  Tempe, Arizona;  Gilbert, Arizona;  and Peoria, Arizona.

Education:
Year   Degree   Subject   Institution  
1986   PhD   Mechanical Engineering   Univ of Southern California  
1982   MS   Mechanical Engineering   Univ of Southern California  
1980   BS   Mechanical Engineering   Texas A & M University  

Work History:
Years   Employer   Department   Title   Responsibilities

1986 to

 

(Undisclosed University)

 

Aerospace and Mechanical Engineering

 

Associate Head, Associate Professor

 

Manages undergraduate affairs, coordinates teaching and services in 25-faculty, 15-staff, 650-student department; teaches senior and grad courses; conducts research and consulting

2003 to 2004

 

NASA/JPL

 

Mechanical Systems

 

Visiting Scientist

 

Designed deployable structure concepts for large antennae (two summers only)

2000 to 2000

 

TNO (Netherlands)

 

MADYMO

 

Visiting Scientist

 

Improved and corrected commercial code used for crashworthiness analysis (one sabbatical year)


Career Accomplishments:
Associations/Societies

Member, Advisory Board, Multibody System Dynamics; Member, Postdoctoral Research Associate Program Panel of the Computational and Information Science and Engineering Division, National Science Foundation; Secretary and Treasurer, Advisory Board of the Arizona Movement Balance Laboratory, the NovaCare Corporation, Tucson, Arizona; Associate Director, Engineering Research Center, American University of Armenia, Yerevan, Armenia; Member, Local Organizing Committee, Eleventh U.S. National Congress of Applied Mechanics; Session chairman, “Rigid Body Dynamics and Lumped Parameter Systems,” Eleventh U.S. National Congress of Applied Mechanics; Member, Research Initiation Panel of the Dynamics and Control Systems program, National Science Foundation;

Professional Appointments

Reviewer for the ASME Journal of Applied Mechanics, ASME Journal of Engineering for Industry, ASME Journal of Biomechanical Engineering, Dynamics and Control, Multibody System Dynamics; Reviewer for the American Control Conference Reviewer for proposals to the National Science Foundation; Reviewer for proposals to the Army Research Office; CAD/CAM book reviewer for HarperCollins Publishers, John Wiley and Sons, West Publishing Company, PWS Publishing Company;

Awards/Recognition

Presidential Young Investigator Award. Boeing A. D. Welliver Faculty Fellowship. Biographee in Marquis Who's Who in Science and Engineering. Biographee in Dictionary of International Biography.


Publications:
Publications and Patents Summary

He has over 15 publications in the field and many conference and lecture presentations.


Government Experience:
Years   Agency   Role   Description
1976 to 1979   Foreign Broadcast Information Service   Monitor   Monitored, selected, translated news and commentary from broadcast and print media in Turkish and Armenian
1980 to   Open Source Center   Translator/selector   Selects and translates news and commentary from Internet and print media in Turkish and Armenian
1987 to 1987   National Science Foundation   Panel member   Reviewed and selected proposals for funding
1999 to 1999   National Science Foundation   Panel member   Reviewed and selected proposals for funding

Consulting Services:
Selected Consulting Examples:
  • Provided analyses and arguments in numerous cases involving whiplash and back injuries in low-speed vehicle collisions to law firms and Allstate Insurance.
  • Provided detailed finite-element analyses for failure of a dental chair, a portable massage table, and similar products to local law firms.
  • Provided finite-element and dynamic analyses for load rating structures used by a Tucson subsidiary of Caterpillar corporation; redesigned structures for lower cost manufacturing while maintaining load ratings; designed tests to verify analyses
  • Generated various concepts for classified new types of missiles for Raytheon Corporation.
  • Identified source of vibration problem for a high-precision medical device manufactured by a local company; provided a solution for fixing the problem
Recent Client Requests:
  • Expert in mechanical stress testing for consulting on Failure analysis.
Click the green button above to contact Expert for a free initial screening call regarding your expert consulting needs.  Expert is available for consulting to corporate, legal and government clients.  Remember, your initial screening call to speak with Expert is free.

Expert Witness:
Expert Witness Experience Summary:
Provides consulting services to various lawyers in Tucson on cases involving low-speed vehicle crashes, failure of various mechanical structures, patent infringements, playground safety, etc.
Recent Litigation Client Requests:
  • Expert for consulting on Analyis and Court testimony.
  • Mechanical engineering and materials expert.
Click the green button above to contact Expert for a free initial screening call regarding expert testimony, litigation consulting and support, forensic services, or any related expert witness services.  A few litigation needs include product liability, personal injury, economic loss, intellectual property (patent, trademark, trade secret, copyright), and insurance matters.  Remember, your initial screening call to speak with Expert is free.

International Experience:
Years   Country / Region   Summary
2000 to 2000   Netherlands   Improved and corrected a commercial code (MADYMO) used by the automotive industry for crashworthiness analysis;
1993 to 1993   Armenia   Developed courses and research programs for scientists in newly independent Soviet republic
1996 to 1999   Armenia   Secured funding for civilian use of military technology used in former USSR; collaborated with scientists in charge of program funded by US government agency
1996 to 1999   Turkey   Secured funding from NATO for joint project with a Turkish university; worked and published on dynamics of rotating deformable bodies.
1999 to 1999   Denmark   Taught short course on advanced computational methods in multibody dynamics at Technical Univ of Denmark.

Language Skills:
Foreign Language   Description
Turkish   Professional translator Turkish <-> English
Armenian   Professional translator Armenian <-> English
Greek  
French  

Additional Skills and Services:
Other Skills and Services

Provides consulting services to local small and large companies on requests involving electronic packaging, shock and dynamic analysis and testing, finite element analysis for structural integrity, concept development for advanced and novel articulating mechanical systems, biomechanical analysis.


 

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