CURRICULUM VITA

 

 

 

Surname: Spentzas

Given Names: Konstantinos

Son of: Nicholas

Titles: Dr ès Sciences Techniques Ecole Polytechnique Fédérale Lausanne, Chief Academician Secretary of the Euro-Mediterranean Academy of Arts and Sciences, Founder and former Professor-Director of Vehicles Laboratory of the National Technical University of Athens

Date of Birth: 24 May 1944 Place of Birth: Athens, Greece

Position: Chief Academician Secretary of the Euro Mediterranean Academy of Arts and Sciences (EMAAS)

 

Address:

Digeni 5A

16673 Voula

Greece

Telephone: +30 210 8952962

Mobile: +30 693 2040323

Married On: 7 July 1983 To: Assimina Goritsa Divorced On: 27 July 1985

Number of Children: 1 Sons: 0 Daughters: Irene

Nationality: Hellenic

 

Education:

1)    Certificate M.P.C. in Mathematics, Physics, Chemistry/ University of Paris (Paris/ France)/ 1963.

2)    Diploma in Mechanical Engineering/ EPUL (University of Lausanne-Engineering School/ Lausanne/ Switzerland)/ 1968.

3)    Doctor of Technical Sciences/ EPFL (Federal Technical University of Lausanne/ Lausanne/ Switzerland) 1972.

4)    Certificate of Postgraduate Studies in Physical Metallurgy/ EPFL/ Lausanne/Switzerland/ 1972.

5)    Studies in Law, Economic and Business Administration in the University of Lausanne, 1970 to 1972.

 

Career History:

1)       Assistant II EPFL Lausanne/Switzerland 1/1/1970-31/1/70

2)       Assistant I EPFL Lausanne/Switzerland 1/1/1971-31/12/71

3)       Professor SYST (Group of Technical

Schools of the

Hellenic Army) Athens/Greece 1/10/1973-31/7/1978

4)       Professor Higher School of Engineers Athens/Greece 1/9/1974-31/8/1975

5)       Engineer Public Petroleum Corporation Athens/Greece 22/4/1976-16/12/1977

6)       Engineer Bureau of Military Works of Athens/Greece 7/2/1977-30/4/1978

the Hellenic Army

7)       Consulting Engineer Independent Athens/Greece 1/1/1978-today

8)       Research Assistant NTUA (National Technical Athens/Greece 1982

University of Athens)

9)       Lecturer NTUA Athens/Greece 1982-1988

10)   Assistant Professor NTUA Athens/Greece 1988-1998

11)   Associate Professor NTUA Athens/Greece 1998-2003

12)   Professor NTUA Athens/Greece 2003-2011

 

Position(s):

1)       Professor of Dynamics of Mechanical Constructions & Construction of Vehicles at the National Technical University of Athens /Greece 1988-2011.

2)       Founder and Professor-Director of Vehicles Laboratory of the National Technical University of Athens /Greece 1986-2011.

3)       Director of the Programme in Postgraduate Studies Automation Systems at the National Technical University of Athens, 2006-2008.

4)       Chief Academician Secretary of the Euro Mediterranean Academy of Arts and Sciences, 2008 - today

5)       Co-Chairman or Member of the Organising Committee of many Scientific Conferences, Congresses and Symposia.

 

Membership in scientific and cultural societies:

1)       Member of TEE (Hellenic Technical Chamber) 1972 - 2011

2)       Vice-president of the Hellenic Institute of Electric Vehicles 1993 - 2012

3)       Société Suisse des Ingénieurs et des Architectes 1970 - 2000

4)       American Society for Testing & Materials 1970 - 1983

5)       American Society for Heating Refrigeration & Air conditioning 1977 - 1993

6)       Society of Automotive Engineers International 1990 - 1999

7)       International Advisor, Society of Automotive Engineers International 1994 -1999

8)       New York Academy of Sciences 1994 -1999

9)       Chief Academician Secretary, Euro Mediterranean Academy of Arts & Sciences 2010 today

10)   President of the Leica Hellenic Club of Photography 1996 - today

 

Honours/Awards/Prizes:

1)       Hellenic Patent No 1002432 by the Hellenic Patent Office for a vehicles suspension system.

2)       International Patent (PCT) for gears and a differential (with Theodore and Vassilis Tsiriggakis).

3)       Diploma of Honour of the Union of Hellenic Writers (1996).

4)       Honorary Diploma by the Georgia Academy of Sciences (2008).

5)       Visiting Professor to the Faculty of Mechanical Engineering, University of Kragujevac/Sebia, 2010-

6)       Gr.PhD., Euro Mediterranean Academy of Arts & Sciences (2012).

 

Publications:

10 books or lecture notes and more than 150 scientific papers in Hellenic or International Journals and in the Proceedings of Hellenic or International Symposia.

 

Military Record

Lieutenant of the Hellenic Army Technical Corps (on duty as sub-lieutenant from May 1973 to September 1975)

 

Leisure Interests:

Photography, sailing, scuba diving, horse riding, hunting.

 

Main Research Work and Scientific Publications:

1)       My PhD thesis was a contribution in the theory of shells. I elaborated an original method for the computation of shells with revolution symmetry that differs from the finite element method, because the nodes along all the shell are used in the computation of the displacements, stresses and strains. The method is most adapted to axis symmetric short shells, where the boundary conditions are influential along all the shell. The above work was continued later on and leads to the generalisation of the boundary layer theory of fluids in the case of solids and in other engineering problems (see here-after under 4). My thesis was published in Athens and 300 copies were submitted to EPF Lausanne, according to the thesis regulation; the thesis is even now actual and copies are sold to interested persons.

2)       With my colleagues P. Makris we studied the problem of cracked shafts and the possibility of fatigue crack detection at an early stage. We came up with an original solution, published in [C1] and [C2], by use of cracking conductive varnish layers on the surface of the shaft and monitoring the variations of the electric resistance of this layer. The location of the layer permits to detect and localise the area of crack on the shaft.

3)       Optimisation of vibration isolators and elastic foundations of machines: The results are resumed in publication [J1], where it is pointed out that the use of any mathematical algorithm (ex. Box algorithm) does not give meaningful results without taking into consideration the acceptable values of the optimised parameters. This work was generalised for non-symmetric three-dimensional systems, but the results have not been published.

4)       With my colleague A. Kanarachos we worked in the generalisation of the well-known boundary layer theory of fluids in the case of solids and in other engineering problems. The results are presented in publication [J2].

5)       With my colleague A. Kanarachos we also introduced the concept and the method of artificial damping that we introduce momentary in a vibrating system in order to dampen the transients and compute much faster and with less effort the steady state of the system. (publication [J3]). Later on, others cited our work and applied our concept and method in other scientific areas.

6)       Moreover, with my colleague A. Kanarachos we investigated the performance of four finite-element methods frequently used to solve self-adjoint and non-self-adjoint problems (publication [J4]).

7)       Publication [J5] and [J6] are dealing with the static and dynamic analysis of thin-walled pipes (PhD work of our student Dr Koutsidis).

8)       With my colleague A. Kanarachos we also dealt with the problem of the steady-state analysis of harmonically excited non-linear systems, focusing most particularly to systems with many degrees of freedom (for example 20-24). We used the Galerkin formulation and transformed the mathematical problem of solving a system of non-linear differential equations to the solution of a system of non-linear algebraic equations. Their solution by known methods being not possible, we used an optimisation algorithm to determine the minimum, which was also the solution (publication [J7]).

9)       In publication [J8] I published my point of view on an electric vehicle policy that was presented in the Committee on Transport and Tourism of the European Parliament (invitation to the hearing of the 4th November 1992).

10)   Publication [J9] resumes my work in the optimisation of the ride characteristics of vehicles. The Box algorithm was used with very good results, better that those obtained by other researchers using different algorithms. The results of this publication also originated a long and fruitful collaboration with my Serbian colleague Prof. M. Demić, who was at that time also dealing with the same kind of problems.

11)   Publication [J10] to [J15] in the scientific magazine of the Hellenic Technical Chamber present articles (some of them with my students) in the field of electric vehicles, which were previously presented in the Conference organised in Athens in 1993 by the Hellenic Technical Chamber (publications [C3], to [C8]). All these work comes from the programme STRIDE-ECVET that was financed by the EEC and the Hellenic Republic.

12)   Publication [J16] in the International Journal Electromotion presents an electric vehicle that was built in collaboration with the University of Patras in the context of the STRIDE programme, financed by the EU and the Hellenic Republic.

13)   Form many years I have been working on vehicles passive suspension systems. With my PhD student D. Koulocheris we presented in 1995 an optimised large band filter for vehicle passive suspension (publication [C15], [C20]). Myself I have been working for many more years on an original passive suspension system that could manage the perturbation energy incoming to the vehicle from the environment and could keep horizontal the sprung mass of the vehicle, neutralising the roll and the pitch. The 16th October 1995 I filled my invention in the Hellenic Patent Office and the 11th September 1996 the Hellenic Patent Office attributed to me the Hellenic Patent No 1002432. The main scientific foundation of my invention was presented in the 28th ISATA, in Stuttgart/Germany (publications [C14], [C19]). After that, I gave the subject of my invention as PhD subject to my student A. Tsolakis; we studied further the scientific aspects of that system and published the obtained results in publication [J17], [J21], [C21], [C23] and [C31]. Moreover, the problem of hybrid suspension systems was analysed with my student S. Kanarachos. Hybrid suspension systems have the great advantage to behave as active only when needed and consequently consume much less energy than the active ones. Results were published in [J29], [J30],

14)   Since 1999 I was passionate with scientific aspects of four-wheel steering vehicles. I supervised two PhD students, we pushed this study to very interesting areas. With I. Alkhazali we investigated the kinematics and the dynamics of four-wheel steering vehicles and we published our results in publications [J18], [J23], [J24], [J39], [C24], [C25]. Moreover, introducing the concept of electronic differential, we applied the elaborated numerical model to vehicles with four-wheel steering and four-wheel drive, driven by four electric motors controlled by an electronic controller that behaves as an electronic differential and assumes the functions of three mechanical differentials (publications [J25], [C17], [C27]). With Ch. Chatzikomis we investigated (by numerical model simulation) and compared the dynamic performance of four-wheel-steering vehicles to vehicles equipped with electronic stability control system (ESC) (publication [J53] submitted to Forschung im Ingenieurwessen). To make the comparison objective we elaborated a path-following driver model with longitudinal and later control of vehicles motion (publication [J50]).

15)   The subject of electric vehicles continues to be a priority research subject. Considering that the comparison of the technical specification of existing electric vehicles is important for future developments, we elaborated with my student D. Lefantzis a relational database that contains the 124 most important specifications of all existing at that time electric, hybrid and fuel-cell vehicles and we presented it to EVS-15 in Brussels (publication [C22]). Our work attracted the interest of Ford and Fiat automotive industries and we offered a complimentary copy of our database to them. Also publication [C16], [C18] are on electric vehicles.

16)   The cinematic and dynamic analysis of mechanisms by use of the finite element method has been an important topic since many years. The school of Delft elaborated adequate software for this purpose. But, given the complexity of the non-linear finite element method used, their software is un-attractive to most users. Starting from the assumption that any large displacement can be decomposed to a finite number of very small displacements for which the linear finite element method can be used, we studied with my PhD student the problem with fresh ideas. The results were very satisfying and were published in [J31], [J35], [C33], [C34], [C42].

17)   Collaboration for many years with my colleagues from Serbia, Prof. Demic and Lukic, in different research topics in automotive engineering is published in [J19], [J20], [J22], [J26], [J27], [J28], [J33], [C28], [C29], [C30], [C35], [C36], [C37], [C43].

18)   With my PhD student S. Kanarachos we also published research results in applied control of vehicles handling and comfort: [J36], [J37], [J38], [C38], [C39], [C40], [C41].

19)   In 2005 we presented with the industrial designer G. Michael an extremely advanced electric/solar vehicle designed on the basis of the minimalist design theorem that I have formulated. This ultra light vehicle is moved by 4 linear motors on wheels: [J41], [J43], [C51], [C60], [C73].

20)   For many years we have been pursuing research on composite materials with the postdoctoral researcher, Dr N. Pantelelis. Among other research topics as for ex. Sandwich Structural Panels, we were elaborating and perfecting an experimental method that can guarantee the quality of these materials during the production phase by use of sensors to measure either dielectric or resistive properties of the material during the production phase: [J34], [J48], [J46], [J48], [C63], [C72], [C76].

21)   Problems related to heavy tacks have also been in my research field, as well as the field of model identification through measured parameters. With my students D. Koulocheris and V. Dertimanis we have made several publications: [J42], [J44], [C45], [C46], [C52], [C53], [C57], [C58], [C59], [C61].

22)   Since 2006 I extended my research fields to vehicles crash by joining the team of Prof. A. G. Mamalis that was at that time and until his retirement the director of the most equipped laboratory in Greece for experimental research in vehicles crash: [J45], [J46], [J47], [J49], [J51], [C64], [C71].

23)   The problems of climate change due to the huge increase of vehicles fleet has been of great concern to me as well as the problem of energy sustainability, because energy sources of our planet will soon be depleted: [C77], [C78].

24)   Since 2008, I have been investigating the problem of globalisation and economic crisis by use of the theory of systems. I also used the same theory in order to explain that stability of the internet can only be secured if and only if internet is equipped with strict rules that give to it the true character of a system: [C79], [C80].

25)   An original approach to the education based on the theory of systems was presented at e-RA 7 / 2012 International Conference held in Athens.