See veebileht kasutab küpsiseid kasutaja sessiooni andmete hoidmiseks. Veebilehe kasutamisega nõustute ETISe kasutustingimustega. Loe rohkem
Olen nõus

Jakub Kõo

https://www.etis.ee/CV/Jakub_Kõo/est
18.04.1931
7313176
jakub.koo@emu.ee

Teenistuskäik

Töökohad ja ametid
1999–...   
Eesti Maaülikool, Metsandus- ja maaehitusinstituut, Emeriitprofessor
02.01.2009–31.12.2009   
Tallinna Tehnikaülikool, Mehaanikateaduskond, Materjalitehnika instituut, Erakorraline teadur (0,25)
01.09.2008–31.12.2008   
Eesti Maaülikool, Metsandus- ja maaehitusinstituut, Erakorraline vanemteadur (1,00)
2006–31.08.2008   
Eesti Maaülikool, Metsandus- ja maaehitusinstituut, maaehituse osakond, Erakorraline vanemteadur (0,50)
01.01.1994–31.12.1999   
Eesti Põllumajandusülikool, maaehituse instituut; Juhataja-professor
01.01.1992–31.12.1994   
Eesti Põllumajandusülikool, ehitusmehaanika ja -konstruktsioonide õppetool; Juhataja-professor
01.01.1988–31.12.1992   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Juhataja-professor
01.01.1982–31.12.1988   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Dotsent
01.01.1979–31.12.1982   
Alžeeria Hüdrotehnika ja Maaparanduse Instituut, rakendusmehaanika kateeder; Juhataja-dotsent
01.01.1978–31.12.1979   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Dotsent
01.01.1968–31.12.1978   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Juhataja- dotsent
01.01.1966–31.12.1968   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Dotsent
01.01.1962–31.12.1966   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder; Vanemõpetaja
01.01.1961–31.12.1962   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika kateeder, Assistent
01.01.1960–31.12.1961   
Eesti Põllumajanduse Akadeemia, metallide tehnoloogia ja masinate remondi kateeder, assistent
01.01.1955–31.12.1957   
Eesti Põllumajanduse Akadeemia, ehitusmehaanika ja metsatranspordi kateeder; assistent
 
 
Haridustee
1957–1960   
Leningradi Põllumajanduse Instituut, tugevusõpetuse ja masinaelementide kateeder; Sihtaspirant; Tehnikakandidaat (1965)
1950–1955   
Tartu Riiklik Ülikool / Eesti Põllumajanduse Akadeemia, Metsandusteaduskond ; metsatööstuse insener-tehnoloog ( cum laude)
1946–1950   
Tartu Industriaaltehnikum / Tartu Ehitustehnikum; Tööstus- ja tsiviilehituse tehnik (cum laude)
 
 
Teadusorganisatsiooniline ja -administratiivne tegevus
2009−...   
Eesti Rahvusliku Mehaanika Komitee liige
2005−...   
Estonian Journal of Engineering toimetuskolleegiumi liige
1973−...   
Jääkpingete uurimisgrupi asutaja ja juht Eesti Põllumajanduse Akadeemias
1988−2001   
Maaehituse eriala (sh magistri- ja doktoriõpe) käivitamise algatamine ja korraldamine
1968−1999   
Instituudi / õppetooli / kateedri juhataja 1988-1999, 1979- 1982, 1968-1978
 
 
Lisainfo
Õppeained: Õhusõiduki ehitusmehaanika alused (6 EAP, Eesti Lennuakadeemia ainekursus)

Kvalifikatsioon

Teaduskraadid
Jakub Kõo, doktorikraad, 1994, (juh) , Determination of Residual Stresses in Coatings and Coated Parts (Jääkpingete määramine pinnetes ja pindega detailides), Tallinna Tehnikaülikool, Mehaanikateaduskond.
 
 
Teaduspreemiad ja tunnustused
2001, Jakub Kõo, Eesti Põllumajandusülikooli teenetemedal
1998, Jakub Kõo, Eesti Põllumajandusülikooli emeriitprofessor
 
 
Teadustöö põhisuunad
ETIS KLASSIFIKAATOR: 4. Loodusteadused ja tehnika; 4.12. Protsessitehnoloogia ja materjaliteadus; TÄPSUSTUS: Eksperimentaalne jääkpingeanalüüs. Termopingeanalüüs. Puidumehaanika

Juhendamisel väitekirjad

Juhendatud väitekirjad

Publikatsioonid

Klass
Aasta
Publikatsioon
 
1.1.
2016
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Matvejev, D. (2016). Comparison of Some Mechanical and Physical Methods for Measurement of Residual Stresses in Brush-Plated Nickel Hardened Gold and Silver Coatings. Materials Science, 22 (1), 36−40. DOI: 10.5755/j01.ms.22.1.7439.
3.2.
2015
Kõo, Jakub; Valgur, Jaak (2015). Extension of Kübler’s model for analysis of growth stresses in tree disc. In: J. Lellep, E. Puman (_EditorsAbbr). Proceedings of the 3rd International Conference Optimization and Analysis of Structures (39−44).. Tartu, Estonia: University of Tartu Press.
3.1.
2014
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Dong, M. (2014). Relaxation of residual stresses in brush-plated gold and silver coatings on copper and on brass substrates. In: Advanced Materials Research (866−871). Trans Tech Publications Ltd. DOI: 10.4028/www.scientific.net/AMR.996.866.
3.1.
2014
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Mikli, V. (2014). Comparative Analysis of Residual Stresses Determined by Various Methods in Brush-Plated Hard Gold and Silver Coatings. In: Loča, D. (Ed.). Engineering Materials and Tribology XXII (8−11). Trans Tech Publications Ltd. (Key Engineering Materials; 604). DOI: 10.4028/www.scientific.net/KEM.604.8.
3.1.
2014
Lille, H.; Kõo, J.; Valgur, J.; Ryabchikov, A.; Reitsnik, R.; Veinthal, R. (2014). Measurement of residual stresses in the cold-rolled Fe-Ni-Mn/Invar thermo-bimetallic plate. In: Materials Science Forum (101−106). Trans Tech Publications Ltd.
3.1.
2013
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Veinthal, R.; Mikli, V.; Sergejev, F. (2013). Investigation of residual stresses and some elastic properties of brush-plated gold and silver coatings. In: Hussainova, I. (Ed.). Engineering Materials and Tribology (125−130). Trans Tech Publications Ltd. (Key Engineering Materials; 527). DOI: 10.4028/www.scientific.net/KEM.527.125.
3.2.
2013
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Mikli, V.; Sergejev, F. (2013). Investigation of some properties of brush-plated gold and silver galvanic coatings. In: J. Lellep, E. Puman (Ed.). Proceedings of the 2nd International Conference on Optimization and Analysis of Structures (101−107). Tartu, Estonia: University of Tartu Press.
1.1.
2012
Lille, H.; Kõo, J.; Ryabchikov, A.; Veinthal, R.; Mikli, V.; Sergejev, F. (2012). Determination of modulus of elasticity, nanohardness and residual stresses in brush-plated gold and silver coatings on copper substrate. Materials Science, 18 (1), 51−56.
3.1.
2012
Lille, H.; Ryabchikov, A.; Kõo, J.; Reitsnik, R.; Veinthal, R.; Mikli, V.; Sergejev, F. (2012). Comparison of values of residual stresses determined by various methods in hard nickel coatings prepared by brush-plating in sulfate solution. Proceedings of the 8th International Conference of DAAAM Baltic, Industrial Engineering: 8th International DAAAM Baltic Conference, Tallinn, Estonia, 19-21 April 2012. Ed. T. Otto. Tallinn: Tallinn University of Technology, 680−687.
3.1.
2011
Kõo, Jakub; Valgur, Jaak (2011). Residual Stress Measurement in Coated Plates Using Layer Growing/Removing Methods: 100th Anniversary of the Publication of Stoney’s Paper “The Tension of Metallic Films Deposited by Electrolysis”. Materials Science Forum, 681, 165−170. DOI: 10.4028/www.scientific.net/MSF.681.165.
3.1.
2011
Lille, Harri; Kõo, Jakub; Gregor, Andre; Ryabchikov, Alexander; Sergejev, Fjodor; Traksmaa, Rainer; Kulu, Priit (2011). Comparison of curvature and X-Ray methods for measuring of residual stresses in hard PVD coatings. Materials Science Forum, 681, 455−460. DOI: 10.4028/www.scientific.net/MSF.681.455.
3.1.
2011
Ryabchikov, Alexander; Lille, Harri; Toropov, Stanislav; Kõo, Jakub; Pihl, Toomas; Veinthal, Renno (2011). Determination of residual stresses in thermal and cold sprayed coatings by the hole-drilling method. Materials Science Forum, 681, 171−176.
3.1.
2010
Kõo, J.; Valgur, J. (2010). Determination of residual stresses in coated plates using layer growing/removing methods: 100th anniversary of Stoney’s equations. Proceedings of the 7th International Conference of DAAAM Baltic, Industrial Engineering, II: 7th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 22-24, 2010. _EditorsAbbr R. Kyttner. Tallinn: Tallinn University of Technology Press, 516−521.
3.1.
2010
Lille, H.; Kõo, J.; Ryabchikov, A.; Toropov, S.; Veinthal, R.; Surzhenkov, A. (2010). Comparative analysis of residual stresses in flame-sprayed and electrodeposited coatings using substrate deformation and hole-drilling methods. Proceedings of the 7th International Conference of DAAAM Baltic, Industrial Engineering: 7th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 22-24, 2010. Ed. R. Kyttner. Tallinn: Tallinn University of Technology, 474−479.
3.1.
2009
Kõo, J.; Valgur, J. (2009). Layer growing/removing method for determination of residual stresses in orthotropic non-homogeneous cylinders. Proceedings of the 57th Annual Conference on Applications of X-ray Analysis and the 8th International Coference on Residual Stresses: 57th Annual Conference on Applications of X-ray Analysis and the 8th International Coference on Residual Stresses Denver, Colorado, USA, 4-8 August 2008. _EditorsAbbr Blanton, T.; Noyan, I.C. et al. Pennsylvania, USA: International Centre for Diffraction Data (ICDD), 352−359. (Advances in X-ray Analysis; 52).
3.1.
2009
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R. (2009). Residual stresses in brush-plated gold coating. Proceedings of the 57th Annual Conference on Applications of the X-ray Analysis and the 8th International Conference on Residual Stresses: 57th Annual Conference on Applications of the X-ray Analysis and the 8th International Conference on Residual Stresses, Denver, Colorado, USA, 4-8 August 2008. Ed. Blanton, T.; Noyan, I.C. USA, Pennsylvania: International Centre for Diffraction Data (ICDD), 320−327. (Advances in X-ray Analysis; 52).
3.1.
2009
Lille, H.; Kõo, J.; Ryabchikov, A. (2009). Residual stresses analysis in brush-plated galvanic coatings deposited from nickel sulfate electrolyte. Proceedings of the 57th Annual Conference on Applications of X-ray Analysis and the 8th International Conference on Residual Stresses: 57th Annual Conference on Applications of X-ray Analysis and the 8th International Conference on Residual Stresses, Denver, Colorado, USA, 4-8 August 2008. Ed. Blanton, T.; Noyan, I.C. USA, Pennsylvania: International Centre for Diffraction Data (ICDD), 706−713. (Advances in X-ray Anaysis; 52).
5.2.
2009
Gregor, A.; Lille, H.; Kõo, J.; Sergejev, F.; Traksmaa, R.; Sivitski, A.; Kulu, P. (2009). Evaluation of mechanical properties and residual stresses of hard PVD coatings. 18th International Baltic Conference Engineering Materials & Tribology BaltMatTrib-2009, October 22-23, 2009, Tallinn, Estonia : Abstracts. Tallinn: Tallinn University of Technology, 34.
1.1.
2008
Lille, H.; Kõo, J.; Ryabchikov, A. (2008). On investigation of residual stresses in brush-plated silver coating. Materials Science, 14 (3), 226−229.
1.2.
2008
Lille, H.; Kõo, J.; Pihl, T. (2008). Measurement of residual stresses in brush-plated gold and silver coatings on thin cross-cut ring substrate. Latvijas Kimijas Žurnals (Latvian Journal of Chemistry), 1, 48−54.
3.1.
2008
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R. (2008). Relaxation of residual stresses in brush-plated gold coating. Proceedings of the 6th International Conference of DAAAM Baltic, Industrial Engineering: 6th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 24-26, 2008. Ed. R. Kyttner, T. Otto. Tallinn: Tallinn University of Technology, 491−496.
3.1.
2008
Kõo, J.; Valgur, J. (2008). Analysis of thermoelastic stresses in layered plates. In: R. Kyttner, T. Otto (_EditorsAbbr). Proceedings of the 6th International Conference of DAAAM Baltic, Industrial Engineering (485−490).. Tallinn: Tallinn University of Technology.
1.2.
2007
Lille, H.; Kõo, J.; Laurson, M. (2007). Shrinkage Stresses in an Epoxy Overlay of Concrete. Vagos, 74 (27) (1), 27−32.
1.1.
2006
Lille, H.; Kõo, J.; Ryabchikov, A.; Pihl, T. (2006). Measurement of Residual Stresses in Electrochemically Metallized Coatings on Thin Cross-Cut Ring Substrate. Materials Science Forum, 524-525, 873−878.
1.1.
2006
Kõo, J.; Valgur, J. (2006). Layer Growing/Removing Method for Determination of Residual Stresses in Thin Orthotropic Inhomogeneous Discs. Materials Science Forum, 524-525, 659−664.
3.1.
2006
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R.; Pihl, T. (2006). Residual Stresses in Different Brush-Plated Coatings. Proceedings of the 5th International Conference of DAAAM Baltic "Industrial engineering - adding innovation capacity of labour force and entrepreneur": 20-22 April 2006, Tallinn, Estonia: (Ed.) Kyttner, R.: 5th International Conference of DAAAM Baltic "Industrial engineering - adding innovation capacity of labour force and entrepreneur": 20-22 April 2006, Tallinn, Estonia. Tallinn: Tallinn University of Technology, 273−278.
1.2.
2005
Lille, Harri; Kõo, Jakub (2005). Determination of the Modulus of Elasticity, Poisson's Ratio and the Coefficient of Thermal Expansion of Electrochemically Metallized Nickel Coating. Proceedings of the Lithuanian Academy of Sciences. Materials Science, 11 (4), 356−359.
3.4.
2005
Lille, H.; Kõo, J.; Laurson, M. (2005). On the determination of residual stresses in the epoxy resin coating for concrete. Proceeding of international scientific conference CIVIL ENGINEERING`05. Jelgava: Latvia University of Agriculture, 42−45.
3.1.
2004
Lille, H.; Kõo, J.; Ryabchikov, A. (2004). Measurement of residual stresses in the coating deposited by brush-plating on a thin-walled short cylinder. DAAAM Proceedings, 4th International Conference Industrial Engineering-New Challenges to SME: DAAAM International Conference, Tallinn, 29-30 April 2004. Ed. Papstel, J; Katalinic, B. Tallinn: Tallinn University of Technology, 207−210.
3.2.
2004
Kõo, Jakub; Ryabchikov, Alexander (2004). Consideration of thermal stresses in experimental residual stress analysis for coatings. Proceedings of 21st Symposium on Experimental Mechanics of Solids: 13-16 October 2004, Jachranka, Poland: 21st Symposium on Experimental Mechanics of Solids: 13-16 October 2004, Jachranka, Poland. Warsaw: Warsaw University of Technology: Politechnika Warszawska, 307−311.
3.4.
2004
Lille, H.; Kõo, J.; Ryabchikov, A. (2004). Comparative Analysis of Residual Stresses in Brush-Plated Nickel Galvanic Coatings Using Substrate Deformation and X-ray Diffraction Methods. Engineering Materials & Tribology 2004. 13th International Baltic Conference. , 170−174.
1.2.
2003
Ryabchikov, Alexander; Lille, Harri; Kõo, Jakub (2003). Determination of residual stresses in a galvanic coating. Proceedings of the Estonian Academy of Sciences. Engineering, 9 (4), 281−292.
1.1.
2002
Ryabchikov, A.; Lille, H.; Kõo, J. (2002). A Device for Determination of Residual Stresses in Galvanic Coatings From the Measured Longitudinal Deformation of a Strip Substrate. Materials Science Forum, 404-407, 263−268.
1.1.
2002
Kõo, J.; Lille, H.; Ryabchikov, A. (2002). On Determination of Residual Stresses in Coatings From the Measured Longitudinal Deformation of a Strip Substrate. Materials Science Forum, 404-407, 849−854.
1.2.
2002
Lille, H.; Kõo, J.; Kulu, P.; Pihl, T. (2002). Residual stresses in different thermal spary coatings. Proceedings of the Estonian Academy of Sciences. Engineering, 8 (3), 162−173.
3.4.
2002
Lille, H.; Kõo, J.; Pihl, T. (2002). Measurement of Residual Stresses in Brush Plated Nickel Coatings. Proc. 3rd Int. Conf. DAAAM Nat. Est.. _EditorsAbbr J. Papstel, B. Katalinic. Tallinn, 185−188.
3.4.
2002
Lille, H.; Kõo, J.; Valgur, J.; Ryabchikov, A. (2002). On Determination of Residual Stresses in the Calvanic Steel Coating by Layer Growing/Remowing Method. Agricultural machinery, buildings, energy and hydraulic engineering, 215. Ed. Resev, J. Estonian Agricultural University, 131−134.
3.4.
2001
Rjabtšikov, A.; Lille, H.; Kõo, J. (2001). On the Determination of Residual Stresses in Galvanic Nickel Coatings by Length-Change Measurement of a Strip Substrate. 214. Estonian Agricultural University, 216−221.
3.4.
2001
Lille, Harri; Kõo, Jakub; Kulu, Priit; Pihl, Toomas (2001). Residual stresses in some thermal sprayed coatings. Materials Engineering & Balttrib 2001 : materials of the X-th International Baltic Conference : September 27-28, Jurmala, Latvia. Riga: TTY puuduv kirjastus, 164−168.
1.1.
2000
Kõo, Jakub; Valgur, Jaak (2000). Layer Growing/Removing Method for the Determination of Residual Stresses in Thin Inhomogeneous Discs. Materials Science Forum, 347-349, 89−94.
1.1.
2000
Valgur, Jaak; Kõo, Jakub (2000). Hybrid experimental/numerical technique for determination of residual stresses in inhomogeneous cylinders. Materials Science Forum, 347-349, 74−79.
3.1.
2000
Kulu, P.; Veinthal, R.; Kõo, J.; Lille, H. (2000). Mechanism of abrasion-erosion wear of sprayed coatings. In: Miannay, D.; Costa, P.; François, D.; Pineau, A. (Ed.). In: Proceedings of EUROMAT 2000 „Advances in mechanical behaviour, plasticity and damage“: 7-9 November 2000, Tours, France (651−656). . Elsevier.
3.2.
2000
Kõo, Jakub; Ryabchikov, Alexander (2000). On the determination of residual stresses in coatings from measured longitudinal deformation of a wire substrate. Proceedings of 19th Symposium on Experimental Mechanics of Solids: 19th Symposium on Experimental Mechanics of Solids: 18-20 October 2000, Jachranka, Poland. Warsaw: Warsaw University of Technology: Politechnika Warszawska, 319−324.
3.4.
2000
Rjabtšikov, A.; Lille, H.; Kõo, J. (2000). Using the Elastic Element for Determination of Residual Stresses in Galvanic Coatings by Measuring the Longitudinal Deformation of a Wire Substrate. 206. Estonian Agricultural University, 170−175.
3.4.
1999
Rjabtšikov, A.; Lille, H.; Kõo, J. (1999). On the Determination of Residual Stresses in the Galvanic Nickel Coatings by the Method of Measuring the Longitudinal Deformation of a Wire Substrate. 204. Estonian Agricultural University, 101−106.
8.09.2021

Jakub Kõo

https://www.etis.ee/CV/Jakub_Kõo/eng
18.04.1931
7313176
jakub.koo@emu.ee

Career

Institutions and positions
1999–...   
Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Professor emeritus
02.01.2009–31.12.2009   
Tallinn University of Technology , Faculty of Mechanical Engineering, Department of Materials Engineering , Extraordinary Researcher (0,25)
01.09.2008–31.12.2008   
Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Extraordinary Senior Researcher (1,00)
2006–31.08.2008   
Estonian University of Life Sciences, Institute of Forestry and Rural Engineering, Department of Rural Building, Extraordinary Senior Researcher (0,50)
01.01.1994–31.12.1999   
Estonian Agricultural University, Institute of Rural Building; Head-Professor
01.01.1992–31.12.1994   
Estonian Agricultural University, Chair of Structural Mechanics and Engineering; Head-Professor
01.01.1988–31.12.1992   
Estonian Agricultural Academy, Department of Structural Mechanics; Head-Professor
01.01.1982–31.12.1988   
Estonian Agrcultural Academy, Department of Sructural Mechanics; Associate Professor
01.01.1979–31.12.1982   
Algerian Institute of Hydrotechnics and Soil Improvement, Department of Applied Mechanics; Head-Associate Professor
01.01.1978–31.12.1979   
Estonian Agricultural Academy, Department of Structiral Mechanics; Associate Professor
01.01.1968–31.12.1978   
Estonian Agricultural Academy, Department of Structural Mechanics; Head-Associate Professor
01.01.1966–31.12.1968   
Estonian Agricultural Academy, Depertment of Structural Mechanics; Associate Professor
01.01.1962–31.12.1966   
Estonian Aagricultural Academy, Department of Structural Mechanics; Senior Teacher
01.01.1961–31.12.1962   
Estonian Agricultural Academy, Department of Structural Mechanics; Assistant
01.01.1960–31.12.1961   
Estonian Agricultural Academy, Department of Production Engineering and Machine Repair, Assistent
01.01.1955–31.12.1957   
Estonian Agricultural Academy, Department of Structural Mechanics and Timber Transport; Assistant
 
 
Education
1957–1960   
Leningrad Agricultural Institute, Department of Strength of Materials and Machine Elements; Research Student; Candidate of Technical Sciences (1965)
1950–1955   
Tartu State University / Estonian Agricultural Acdemy, Faculty of Forestry; Production Engineer of Wood Industry (cum laude)
1946–1950   
Tartu Industrial Technical School / Tartu Technical School of Civil Engineering; Technician in Civil Engineering (cum laude)
 
 
R&D related managerial and administrative work
2009−...   
Estonian National Commitee for Mechanics, member
2005−...   
Estonian Journal of Engineering, Editorial Board member
1973−...   
Founder and leader of research group of experimental residual stress analysis in Estonian Agricultural Academy
1988−2001   
Initiation and arrangement of starting of the speciality of rural building to include doctoral level
1968−1999   
Head of Institute / Chair / Department 1988-1999, 1979-1982, 1968-1978
 
 
Additional information
Courses: Basics of Aircraft Structural Mechanics (6 ECP, Subject of Estonian Aviation Academy)

Qualifications

Academic degrees
Jakub Kõo, Doctor's Degree, 1994, (sup) , Determination of Residual Stresses in Coatings and Coated Parts, Tallinn University of Technology Faculty of Mechanical Engineering.
 
 
Honours & awards
2001, Jakub Kõo, Medal of the Estonian Agricultural University
1998, Jakub Kõo, Professor Emeritus of the Estonian Agricultural University
 
 
Fields of research
ETIS CLASSIFICATION: 4. Natural Sciences and Engineering; 4.12. Process Technology and Materials Science; SPECIFICATION: Experimental Residual Stress Analysis. Thermoelasticity. Mechanics of Wood
 
 

Dissertations under supervision

Supervised dissertations

Publications

Category
Year
Publication
 
1.1.
2016
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Matvejev, D. (2016). Comparison of Some Mechanical and Physical Methods for Measurement of Residual Stresses in Brush-Plated Nickel Hardened Gold and Silver Coatings. Materials Science, 22 (1), 36−40. DOI: 10.5755/j01.ms.22.1.7439.
3.2.
2015
Kõo, Jakub; Valgur, Jaak (2015). Extension of Kübler’s model for analysis of growth stresses in tree disc. In: J. Lellep, E. Puman (_EditorsAbbr). Proceedings of the 3rd International Conference Optimization and Analysis of Structures (39−44).. Tartu, Estonia: University of Tartu Press.
3.1.
2014
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Dong, M. (2014). Relaxation of residual stresses in brush-plated gold and silver coatings on copper and on brass substrates. In: Advanced Materials Research (866−871). Trans Tech Publications Ltd. DOI: 10.4028/www.scientific.net/AMR.996.866.
3.1.
2014
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Sergejev, F.; Mikli, V. (2014). Comparative Analysis of Residual Stresses Determined by Various Methods in Brush-Plated Hard Gold and Silver Coatings. In: Loča, D. (Ed.). Engineering Materials and Tribology XXII (8−11). Trans Tech Publications Ltd. (Key Engineering Materials; 604). DOI: 10.4028/www.scientific.net/KEM.604.8.
3.1.
2014
Lille, H.; Kõo, J.; Valgur, J.; Ryabchikov, A.; Reitsnik, R.; Veinthal, R. (2014). Measurement of residual stresses in the cold-rolled Fe-Ni-Mn/Invar thermo-bimetallic plate. In: Materials Science Forum (101−106). Trans Tech Publications Ltd.
3.1.
2013
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Veinthal, R.; Mikli, V.; Sergejev, F. (2013). Investigation of residual stresses and some elastic properties of brush-plated gold and silver coatings. In: Hussainova, I. (Ed.). Engineering Materials and Tribology (125−130). Trans Tech Publications Ltd. (Key Engineering Materials; 527). DOI: 10.4028/www.scientific.net/KEM.527.125.
3.2.
2013
Lille, H.; Kõo, J.; Ryabchikov, A.; Reitsnik, R.; Mikli, V.; Sergejev, F. (2013). Investigation of some properties of brush-plated gold and silver galvanic coatings. In: J. Lellep, E. Puman (Ed.). Proceedings of the 2nd International Conference on Optimization and Analysis of Structures (101−107). Tartu, Estonia: University of Tartu Press.
1.1.
2012
Lille, H.; Kõo, J.; Ryabchikov, A.; Veinthal, R.; Mikli, V.; Sergejev, F. (2012). Determination of modulus of elasticity, nanohardness and residual stresses in brush-plated gold and silver coatings on copper substrate. Materials Science, 18 (1), 51−56.
3.1.
2012
Lille, H.; Ryabchikov, A.; Kõo, J.; Reitsnik, R.; Veinthal, R.; Mikli, V.; Sergejev, F. (2012). Comparison of values of residual stresses determined by various methods in hard nickel coatings prepared by brush-plating in sulfate solution. Proceedings of the 8th International Conference of DAAAM Baltic, Industrial Engineering: 8th International DAAAM Baltic Conference, Tallinn, Estonia, 19-21 April 2012. Ed. T. Otto. Tallinn: Tallinn University of Technology, 680−687.
3.1.
2011
Kõo, Jakub; Valgur, Jaak (2011). Residual Stress Measurement in Coated Plates Using Layer Growing/Removing Methods: 100th Anniversary of the Publication of Stoney’s Paper “The Tension of Metallic Films Deposited by Electrolysis”. Materials Science Forum, 681, 165−170. DOI: 10.4028/www.scientific.net/MSF.681.165.
3.1.
2011
Lille, Harri; Kõo, Jakub; Gregor, Andre; Ryabchikov, Alexander; Sergejev, Fjodor; Traksmaa, Rainer; Kulu, Priit (2011). Comparison of curvature and X-Ray methods for measuring of residual stresses in hard PVD coatings. Materials Science Forum, 681, 455−460. DOI: 10.4028/www.scientific.net/MSF.681.455.
3.1.
2011
Ryabchikov, Alexander; Lille, Harri; Toropov, Stanislav; Kõo, Jakub; Pihl, Toomas; Veinthal, Renno (2011). Determination of residual stresses in thermal and cold sprayed coatings by the hole-drilling method. Materials Science Forum, 681, 171−176.
3.1.
2010
Kõo, J.; Valgur, J. (2010). Determination of residual stresses in coated plates using layer growing/removing methods: 100th anniversary of Stoney’s equations. Proceedings of the 7th International Conference of DAAAM Baltic, Industrial Engineering, II: 7th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 22-24, 2010. _EditorsAbbr R. Kyttner. Tallinn: Tallinn University of Technology Press, 516−521.
3.1.
2010
Lille, H.; Kõo, J.; Ryabchikov, A.; Toropov, S.; Veinthal, R.; Surzhenkov, A. (2010). Comparative analysis of residual stresses in flame-sprayed and electrodeposited coatings using substrate deformation and hole-drilling methods. Proceedings of the 7th International Conference of DAAAM Baltic, Industrial Engineering: 7th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 22-24, 2010. Ed. R. Kyttner. Tallinn: Tallinn University of Technology, 474−479.
3.1.
2009
Kõo, J.; Valgur, J. (2009). Layer growing/removing method for determination of residual stresses in orthotropic non-homogeneous cylinders. Proceedings of the 57th Annual Conference on Applications of X-ray Analysis and the 8th International Coference on Residual Stresses: 57th Annual Conference on Applications of X-ray Analysis and the 8th International Coference on Residual Stresses Denver, Colorado, USA, 4-8 August 2008. _EditorsAbbr Blanton, T.; Noyan, I.C. et al. Pennsylvania, USA: International Centre for Diffraction Data (ICDD), 352−359. (Advances in X-ray Analysis; 52).
3.1.
2009
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R. (2009). Residual stresses in brush-plated gold coating. Proceedings of the 57th Annual Conference on Applications of the X-ray Analysis and the 8th International Conference on Residual Stresses: 57th Annual Conference on Applications of the X-ray Analysis and the 8th International Conference on Residual Stresses, Denver, Colorado, USA, 4-8 August 2008. Ed. Blanton, T.; Noyan, I.C. USA, Pennsylvania: International Centre for Diffraction Data (ICDD), 320−327. (Advances in X-ray Analysis; 52).
3.1.
2009
Lille, H.; Kõo, J.; Ryabchikov, A. (2009). Residual stresses analysis in brush-plated galvanic coatings deposited from nickel sulfate electrolyte. Proceedings of the 57th Annual Conference on Applications of X-ray Analysis and the 8th International Conference on Residual Stresses: 57th Annual Conference on Applications of X-ray Analysis and the 8th International Conference on Residual Stresses, Denver, Colorado, USA, 4-8 August 2008. Ed. Blanton, T.; Noyan, I.C. USA, Pennsylvania: International Centre for Diffraction Data (ICDD), 706−713. (Advances in X-ray Anaysis; 52).
5.2.
2009
Gregor, A.; Lille, H.; Kõo, J.; Sergejev, F.; Traksmaa, R.; Sivitski, A.; Kulu, P. (2009). Evaluation of mechanical properties and residual stresses of hard PVD coatings. 18th International Baltic Conference Engineering Materials & Tribology BaltMatTrib-2009, October 22-23, 2009, Tallinn, Estonia : Abstracts. Tallinn: Tallinn University of Technology, 34.
1.1.
2008
Lille, H.; Kõo, J.; Ryabchikov, A. (2008). On investigation of residual stresses in brush-plated silver coating. Materials Science, 14 (3), 226−229.
1.2.
2008
Lille, H.; Kõo, J.; Pihl, T. (2008). Measurement of residual stresses in brush-plated gold and silver coatings on thin cross-cut ring substrate. Latvijas Kimijas Žurnals (Latvian Journal of Chemistry), 1, 48−54.
3.1.
2008
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R. (2008). Relaxation of residual stresses in brush-plated gold coating. Proceedings of the 6th International Conference of DAAAM Baltic, Industrial Engineering: 6th International Conference of DAAAM Baltic, Industrial Engineering, Tallinn, Estonia, April 24-26, 2008. Ed. R. Kyttner, T. Otto. Tallinn: Tallinn University of Technology, 491−496.
3.1.
2008
Kõo, J.; Valgur, J. (2008). Analysis of thermoelastic stresses in layered plates. In: R. Kyttner, T. Otto (_EditorsAbbr). Proceedings of the 6th International Conference of DAAAM Baltic, Industrial Engineering (485−490).. Tallinn: Tallinn University of Technology.
1.2.
2007
Lille, H.; Kõo, J.; Laurson, M. (2007). Shrinkage Stresses in an Epoxy Overlay of Concrete. Vagos, 74 (27) (1), 27−32.
1.1.
2006
Lille, H.; Kõo, J.; Ryabchikov, A.; Pihl, T. (2006). Measurement of Residual Stresses in Electrochemically Metallized Coatings on Thin Cross-Cut Ring Substrate. Materials Science Forum, 524-525, 873−878.
1.1.
2006
Kõo, J.; Valgur, J. (2006). Layer Growing/Removing Method for Determination of Residual Stresses in Thin Orthotropic Inhomogeneous Discs. Materials Science Forum, 524-525, 659−664.
3.1.
2006
Lille, H.; Kõo, J.; Ryabchikov, A.; Laaneots, R.; Pihl, T. (2006). Residual Stresses in Different Brush-Plated Coatings. Proceedings of the 5th International Conference of DAAAM Baltic "Industrial engineering - adding innovation capacity of labour force and entrepreneur": 20-22 April 2006, Tallinn, Estonia: (Ed.) Kyttner, R.: 5th International Conference of DAAAM Baltic "Industrial engineering - adding innovation capacity of labour force and entrepreneur": 20-22 April 2006, Tallinn, Estonia. Tallinn: Tallinn University of Technology, 273−278.
1.2.
2005
Lille, Harri; Kõo, Jakub (2005). Determination of the Modulus of Elasticity, Poisson's Ratio and the Coefficient of Thermal Expansion of Electrochemically Metallized Nickel Coating. Proceedings of the Lithuanian Academy of Sciences. Materials Science, 11 (4), 356−359.
3.4.
2005
Lille, H.; Kõo, J.; Laurson, M. (2005). On the determination of residual stresses in the epoxy resin coating for concrete. Proceeding of international scientific conference CIVIL ENGINEERING`05. Jelgava: Latvia University of Agriculture, 42−45.
3.1.
2004
Lille, H.; Kõo, J.; Ryabchikov, A. (2004). Measurement of residual stresses in the coating deposited by brush-plating on a thin-walled short cylinder. DAAAM Proceedings, 4th International Conference Industrial Engineering-New Challenges to SME: DAAAM International Conference, Tallinn, 29-30 April 2004. Ed. Papstel, J; Katalinic, B. Tallinn: Tallinn University of Technology, 207−210.
3.2.
2004
Kõo, Jakub; Ryabchikov, Alexander (2004). Consideration of thermal stresses in experimental residual stress analysis for coatings. Proceedings of 21st Symposium on Experimental Mechanics of Solids: 13-16 October 2004, Jachranka, Poland: 21st Symposium on Experimental Mechanics of Solids: 13-16 October 2004, Jachranka, Poland. Warsaw: Warsaw University of Technology: Politechnika Warszawska, 307−311.
3.4.
2004
Lille, H.; Kõo, J.; Ryabchikov, A. (2004). Comparative Analysis of Residual Stresses in Brush-Plated Nickel Galvanic Coatings Using Substrate Deformation and X-ray Diffraction Methods. Engineering Materials & Tribology 2004. 13th International Baltic Conference. , 170−174.
1.2.
2003
Ryabchikov, Alexander; Lille, Harri; Kõo, Jakub (2003). Determination of residual stresses in a galvanic coating. Proceedings of the Estonian Academy of Sciences. Engineering, 9 (4), 281−292.
1.1.
2002
Ryabchikov, A.; Lille, H.; Kõo, J. (2002). A Device for Determination of Residual Stresses in Galvanic Coatings From the Measured Longitudinal Deformation of a Strip Substrate. Materials Science Forum, 404-407, 263−268.
1.1.
2002
Kõo, J.; Lille, H.; Ryabchikov, A. (2002). On Determination of Residual Stresses in Coatings From the Measured Longitudinal Deformation of a Strip Substrate. Materials Science Forum, 404-407, 849−854.
1.2.
2002
Lille, H.; Kõo, J.; Kulu, P.; Pihl, T. (2002). Residual stresses in different thermal spary coatings. Proceedings of the Estonian Academy of Sciences. Engineering, 8 (3), 162−173.
3.4.
2002
Lille, H.; Kõo, J.; Pihl, T. (2002). Measurement of Residual Stresses in Brush Plated Nickel Coatings. Proc. 3rd Int. Conf. DAAAM Nat. Est.. _EditorsAbbr J. Papstel, B. Katalinic. Tallinn, 185−188.
3.4.
2002
Lille, H.; Kõo, J.; Valgur, J.; Ryabchikov, A. (2002). On Determination of Residual Stresses in the Calvanic Steel Coating by Layer Growing/Remowing Method. Agricultural machinery, buildings, energy and hydraulic engineering, 215. Ed. Resev, J. Estonian Agricultural University, 131−134.
3.4.
2001
Rjabtšikov, A.; Lille, H.; Kõo, J. (2001). On the Determination of Residual Stresses in Galvanic Nickel Coatings by Length-Change Measurement of a Strip Substrate. 214. Estonian Agricultural University, 216−221.
3.4.
2001
Lille, Harri; Kõo, Jakub; Kulu, Priit; Pihl, Toomas (2001). Residual stresses in some thermal sprayed coatings. Materials Engineering & Balttrib 2001 : materials of the X-th International Baltic Conference : September 27-28, Jurmala, Latvia. Riga: TTY puuduv kirjastus, 164−168.
1.1.
2000
Kõo, Jakub; Valgur, Jaak (2000). Layer Growing/Removing Method for the Determination of Residual Stresses in Thin Inhomogeneous Discs. Materials Science Forum, 347-349, 89−94.
1.1.
2000
Valgur, Jaak; Kõo, Jakub (2000). Hybrid experimental/numerical technique for determination of residual stresses in inhomogeneous cylinders. Materials Science Forum, 347-349, 74−79.
3.1.
2000
Kulu, P.; Veinthal, R.; Kõo, J.; Lille, H. (2000). Mechanism of abrasion-erosion wear of sprayed coatings. In: Miannay, D.; Costa, P.; François, D.; Pineau, A. (Ed.). In: Proceedings of EUROMAT 2000 „Advances in mechanical behaviour, plasticity and damage“: 7-9 November 2000, Tours, France (651−656). . Elsevier.
3.2.
2000
Kõo, Jakub; Ryabchikov, Alexander (2000). On the determination of residual stresses in coatings from measured longitudinal deformation of a wire substrate. Proceedings of 19th Symposium on Experimental Mechanics of Solids: 19th Symposium on Experimental Mechanics of Solids: 18-20 October 2000, Jachranka, Poland. Warsaw: Warsaw University of Technology: Politechnika Warszawska, 319−324.
3.4.
2000
Rjabtšikov, A.; Lille, H.; Kõo, J. (2000). Using the Elastic Element for Determination of Residual Stresses in Galvanic Coatings by Measuring the Longitudinal Deformation of a Wire Substrate. 206. Estonian Agricultural University, 170−175.
3.4.
1999
Rjabtšikov, A.; Lille, H.; Kõo, J. (1999). On the Determination of Residual Stresses in the Galvanic Nickel Coatings by the Method of Measuring the Longitudinal Deformation of a Wire Substrate. 204. Estonian Agricultural University, 101−106.
8.09.2021

Otsi projekti

  • {{item.Name}}
Asutus on projekti finantseerija   Asutus on projekti teostaja  
  • {{searchListItem.Name}}
Kõik   Tavaprojektid   Ülemprojektid   Alamprojektid  
Uus Frascati (2015)
Uus ja vana Frascati (otsing uue järgi väljastab ka seotud vanad)
Kõik
Käimasolevad
Lõppenud
Algus
Hajus
Täpne
Uus otsing (Beetaversioon) Lihtotsing Tühjenda
  • Leitud 2 kirjet
ProgrammLiikNumberNimiProjekti algusProjekti lõppVastutav täitjaAsutusFinantseerijapoolne rahastamine
SFSF0140091s08Kõvapinded ja pinnatehnika01.01.200831.12.2013Priit KuluTallinna Tehnikaülikool, Mehaanikateaduskond705 840,56 EUR
MUU8-2/T5085MIMI05Puit - formeerumine, omadused ja kasutamine01.07.200531.12.2008Peeter MuisteEesti Maaülikool; Eesti Maaülikool, Metsandus- ja maaehitusinstituut203 394,99 EUR