Dr. Dr. Gerda Vaitkunaite

Focus Areas

Surface Texturinge

• Texturing design optimisation for friction reduction;
• Texture development in steel/steel contacts for bearing application;
• Textured surface performance in low viscosity lubricants.

Macrogeometry Characterisation

• Surface curvature influence on friction behaviour;
• Surface waviness effect on coefficient of friction;
• Contact angle influence on friction (conformal  contacts).

Laser Spectroscopy­­
• Chemical characterisation of the engine components analysis;
• Low viscosity lubricant development and analysis;
• Tribofilm chemistry and structure influence on friction performance.

About

Gerda’s BEng and MEng projects analysed development of Diamond Like Carbon (DLC) coatings for engine components. In her MEng project, a correlation was established between the deposition process chemistry, coating friction performance and resistance to impact. In 2018 Gerda joined the Institute of Functional Surfaces at the University of Leeds (UK) to work on a PhD supervised by Prof. Ardian Morina, Prof. Anne Neville and industrial advisor Benoit Thiebaut from TotalEnergies  (France). During her PhD, Gerda was involved in studying the performance of engine tribological components. In collaboration with industry, the PhD investigated the underlying reactions of lubricant additives with the aim to improve lubricant formulation for passenger cars. Gerda has always been involved in outreach and teaching at the various academic institutions that she has attended. At Leeds she taught courses on fundamentals of Raman Spectroscopy and tribometer testing methodology while supervising and managing laboratory responsibilities. Currently Gerda works in collaborative DFG funded project with Institute of Fluid Mechanics (ISTM). The project aims to improve the understanding of macrogemetry and surface texturing  influence on the tribological performance. To achieve this, Gerda is contributing towards development of the digital twin of the experimental tribosystem by providing an experimental characterisation of the tribological response.

She has also been recognised widely for her excellence in approach, receiving multiple awards and scholarships for her academic achievements and research potential. Gerda’s contribution in the fields of tribology, lubrication and wear has been awarded Institute of Mechanical Engineers (United Kingdom, London) Tribology Bronze Medal.

  •  To read more about IMechE
  •  To read more about past research projects: LinkedIn 

 

Education

University of Leeds (Leeds, UK)

Ph.D. in Mechanical Engineering,

 

Advisors: Prof. Ardian Morina, Prof. Anne Neville

 

Corporate sponsor: TotalEnergies (Lyon, France)

Awards and Scholarships

Research Excellence Award, University of Leeds, United Kingdom 2022
Networking grant for Connecting Young Scientists (ConYS), Karlsruhe House of Young Scientists, Germany 2022
Tribology Bronze Medal, Institute of Mechanical Engineers (IMechE), London, United Kingdom 2021
2018-2021 TOTAL and University of Leeds Scholarship for Doctoral Research 2018
Vilnius Tech University Rector's Scholarship for Promising Young Researchers 2017
Most Perspective Graduate Award in Vilnius Tech 2017 and 2015
Research Council of Lithuania Competitive Research Award for Young Scientists 2014
2011-2017 Republic of Lithuania Governmental Scholarship for Higher Education 2011

Taught courses

• Teaching Assistant for European Joint Doctorates (EJD) on Green Tribology for Sustainable Engineering (GreenTRIBOS) University of Leeds, (Leeds, UK)
• Teaching Assistant (MECH1310 Mechanics for Mechatronics and Robotics, Semester 1 and 2) University of Leeds, (Leeds, UK)
• Guest Lecturer (TMM4160 Fracture Mechanics and TMM4195 Fatigue Design), Norwegian University of Science and Technology, (Trondheim, Norway)
• Guest Lecturer (MEMKM17420 Welding of Non-Ferrous Alloys), Vilnius Tech, (Vilnius, Lithuania)

Supervised Thesis projects

• Development of a laser based post-processing process for surface textured 100Cr6 steel surfaces
Entwicklung eines Verfahrens zur Lasernachbearbeitung von laserstrukturierten 100Cr6 Stahloberfächen
• Student: Sarp Dundar
 
• Development of a laser based post-processing process for surface textured 100Cr6 steel surfaces
Entwicklung eines Verfahrens zur Lasernachbearbeitung von laserstrukturierten 100Cr6 Stahloberfächen
• Student: Lisa Plassery
 
 
• Numerical and experimental analysis of the geometry defects on the disk tribometer samples. Numerische und experimentelle Untersuchung von Geometriedefekten in einem Stift-Scheibe Tribometer
• Student: Mikel Samuel
• Co-supervisor with Erik Hansen (ISTM, KIT)

Publications

G. Vaitkunaite, C. Espejo, B. Thiébaut, A. Neville, A. Morina. (2022) " Low friction tribofilm formation and distribution on an engine cylinder tested with MoDTC-containing low viscosity engine lubricants"; Tribology International Vol. 171. https://doi.org/10.1016/j.triboint.2022.107551.

G. Vaitkunaite, C. Espejo, C. Wang, B. Thiébaut, C. Charrin, A. Neville, A. Morina. (2020) "MoS2 Tribofilm Distribution from Low Viscosity Lubricants and its Effect on Friction." Tribology International, Vol. 151 https://doi.org/10.1016/j.triboint.2020.106531.

V. Markowic, Z. Mierzejewska, G. Vaitkunaite, S. Indrisiunas, R. Lukauskaite, O. Cernasejus, V. Golubev. (2016) "Investigation of the Laser Polishing Influence on the Parts Built by SLS." Mechatronic Systems and Materials, 2016. DOI: 10.4028/www.scientific.net/SSP.251.8.

In Preparation or Review

G. Vaitkunaite, C. Espejo, C. Wang, B. Thiébaut, A. Neville, A. Morina. MoS2 tribofilm evolution and friction induction studies with Raman Spectroscopy.