Manufacturing Processes

Manufacturing processes is an "umbrella" term which covers a wide range of diverse processes. They are used to manufacture products, where they transform raw materials into finished goods. Such finished goods may be used to produce other more complex products (such as aircraft, cars etc) or sold to consumers. 

Over the past 20 years we have investigated manufacturing processes through a series of research projects that studied material behaviour in joining , sheet metal forming, the use of nano materials in composites, extended investigations of material behaviour as well as applications using 3D printing for additive manufacturing, and in-depth study of the novel process of cold spraying which can provide thick coatings while possessing additive manufacturing abilities. 

Our efforts together with researchers and industrial partners from Greece, the Northwestern Polytechnical University in China and the Ufa State Aviation Technical University at the Russian Federation have produced to date a number of scientific papers on these subjects.

See article on LinkedIn on the effectiveness of nanotechnology research.

Journal papers on Manufacturing processes

• Vairis, A., “Superplasticity Effects and Strain Rate Dependency in a Material Joining Process”, Journal of Engineering Science and Technology Review, 2008, vol.1, pp.28-32. 

• Alexopoulos, A., Favvas, E.P., Vairis, A., Mitropoulos, A.Ch,.“MWCNTs/resin nanocomposites: structural, thermal, mechanical and dielectric investigation”, Journal of Engineering Science and Technology Review, 2015, vol.8, no.4, pp.7-14. 

• Vairis, A., Petousis, M., Vidakis, N., Savvakis, K., “On the Strain Rate Sensitivity of Abs and Abs Plus Fused Deposition Modelling Parts, Journal of Materials Engineering and Performance, 2016, DOI 10.1007/s11665-016-2198-x.

• Vidakis, N., Vairis, A., Petousis, M., Savvakis, K., Kechagias, J., “Fused Deposition Modelling Parts Tensile Strength Characterisation", Academic Journal of Manufacturing Engineering, 2016, vol.2. 

• Vidakis, N., Petousis, M., Vairis, A., Savvakis, K., Maniadi, A., “On the compressive behavior of an FDM Steward Platform part”, Journal of Computational Design and Engineering, 2017, vol.4, no.4, pp. 339-346.

• Li, W.Y., Li, N., Yang, X.W., Feng, Y., Vairis,A., “Impact of cold spraying on microstructure and mechanical properties of optimized friction stir welded AA2024-T3 joint”, Materials Science and Engineering A, 2017, vol.702, pp. 73-80.

• Yang, K., Li, W., Yang, X., Xu, Y., Vairis, A., ""Effect of heat treatment on the inherent anisotropy of cold sprayed copper deposits", Surface & Coatings Technology, vol.350, pp.519-530. Doi:10.1016/j.surfcoat.2018.07.046 

• Li, N., Li, W.Y., Yang, XW., Xu, Y., Vairis, A., "Corrosion characteristics and wear performance of cold sprayed coatings of reinforced Al deposited onto friction stir welded AA2024-T3 joints”, Surface & Coatings Technology, vol.349, pp.1069-1076. Doi:10.1016/j.surfcoat.2018.06.058. 

• Vidakis, N., Petousis, M., Vairis, A., Savvakis, K., Maniadi, A., “A parametric determination of bending and Charpy’s impact strength of ABS and ABS‐plus fused deposition modeling specimens”, Progress in Additive Manufacturing, 2019, no.3. doi.org/10.1007/s40964-019-00092-8 

• Wen, Q., Li, W.Y., Patel, V., Gao, Y., Vairis, A., “Investigation on the Effects of Welding Speed on Bobbin Tool Friction Stir Welding of 2219 Aluminum Alloy”, Metals and Materials International, 2019, accepted.DOI: https://doi.org/10.1007/s12540-019-00450-9. (IF: 1.647)

• Su, Y., Li, W.Y., Liu, X., Gao, F., Vairis, A., “Strengthening mechanism of friction stir welded alpha titanium alloy specially designed T-joints”, Journal of Manufacturing Processes, 2020 accepted (IF: 3.462)

• Vidakis, N., Petousis, M., Maniadi, A., Koudoumas, E., Vairis, A., Kechagias, J., “Sustainable Additive Manufacturing: Mechanical Response of Acrylonitrile-Butadiene-Styrene over Multiple Recycling Processes”, Sustainability, 2020, vol.12, no.9, pp.3568. Doi: 10.3390/su12093568

• Su, Y., Li, W.Y., Liu, X., Gao, F., Yu, Y., Vairis, A., "Strengthening mechanism of friction stir welded alpha titanium alloy specially designed T-joints", Journal of Manufacturing Processes, 2020, vol.55, pp.1-12.

• Sapalidis, A., Karantzis, P., Vairis, A., Nitodas, S., Barbe, S., Favvas, E., "A Study of the Reinforcement Effect of MWCNTs onto Polyimide Flat Sheet Membranes", Polymers, 2020, vol.12, no.6, pp.1381.

• Dimopoulos, A.; Vairis, A.; Vidakis, N.; Petousis, M., "On the Friction Stir Welding of Al 7075  Thin Sheets", Metals, 2021, 11, 57. https://doi.org/10.3390/met11010057 (IF:1.704) (Q2) 

• Yang, X., Meng, T., Su, Y., Qi, Z., Wu, D., Vairis, A., Li, W.Y., “Study on relieving residual stress of friction stir welded joint of 2219 aluminum alloy using cold spraying”, Materials Characterization, 2023, accepted (IF: 4.342) (Q1)

Conference papers on Manufacturing processes

• Christakis, N., Vairis, A., “The application of computer-aided methodologies in industrial process optimisation”, 4th International Conference in Industry, Business and Education, Corfu, 25-26 August 2005, pp.322-328, ISBN 960-85316-9-1. 

• Karachalios, E., Vairis, A., “The study of design constants in sheet metal forming”, 2nd International Conference “From Scientific Computing to Computational Engineering”, Athens, 5-8 July 2006, ISBN 960-530-080-X

• Vairis, A., “Material flow modelling in a manufacturing process”, 8th HSTAM International Congress on Mechanics, Patras, 12 – 14 July, 2007, pp.773-778.

• Karachalios, E., Vairis, A., “Bend Allowance Constants For Use In Sheet Metal Forming”, 2nd International Conference on Experiments / Process / System / Modelling / Simulation & Optimization, Athens, 4-7 July 2007, ISBN 960-530-090-7.

• Petousis, M., Vairis, A., Vidakis, N., Pappas, G., Koudoumas, M., “Exploiting three dimensional printing in medical applications – Two EMTTU lab case studies”, 6th International Conference “New Horizons in Industry, Business and Education”, Santorini, 27-28 August 2009, pp.314-320. 

• Alexopoulos, N., Lazaridou, I., Vairis, A., Petousis, M., “The effect of different carbon nanotube concentration on glass fiber reinforced plastic coupons under progressive damage accumulation tests”, 16th European Conference on Composite Materials ECCM 2014, Seville, 22-26 June 2014.

• Savvakis K., Petousis M., Vairis, A., Vidakis N., Bikmeyev, A., “Experimental determination of the tensile strength of fused deposition modelling parts”, American Society of Mechanical Engineers-International Mechanical Engineering Congress & Exposition, Montreal, 14-20 November 2014. 

• Lazaridou, I., Alexopoulos, N.D., Vairis, A., Petousis, M., “Mechanical behavior of MWCNT reinforced GFRP composites under fatigue constant amplitude loadings with the presence of artificial notches”, 30th Pan-hellenic conference on Solid-State Physics and Materials Science, Heraklion, 21-24 September 2014.

• Lazaridou, I., Alexopoulos, N.D., Vairis, A., Petousis, M., “Mechanical behavior of MWCNT reinforced GFRP composites under fatigue constant amplitude loadings with the presence of artificial notches”, Second International Conference on Advances in Mechanical and Robotics Engineering - AMRE 2014, Zurich, 25-26 October 2014

• Karantzis, P., Favvas, E.P., Alexopoulos, A., Vairis, A., Mitropoulos, A.Ch., “A study of MWCNTs behaviour as filler material in P84 polyimide films”, Fourth International Symposium Frontiers in Polymer Science, Riva del Garda, 20-22 May 2015.

• Lazaridou, I., Alexopoulos, A., Favvas, E.P., Petousis, M., Vairis, A., “Fatigue mechanical behavior of MWCNT reinforced GFRP composites with surface artificial defects”, 20th International Conference on Composite Materials, Copenhagen, 19-24 July 2015.

• Alexopoulos, N., Vairis, A., Petousis, M., “A study of fatigue mechanical properties of CNT composites”, 9th International Conference “New Horizons in Industry, Business and Education”, Skiathos, 27-29 August 2015, pp.99-103.

• Vidakis, N., Petousis, M., Savvakis, K., Vairis, A., Maniadi, A., Arapis, M., “Experimental Determination of Fused Deposition Modelling Parts Compressive Strength”, 9th International Conference “New Horizons in Industry, Business and Education”, Skiathos, 27-29 August 2015, pp.93-98.

• Vidakis, N., Petousis, M., Vairis, A., Savvakis, K., “Effect of Strain Rate on the Tensile Strength of Fused Deposition Modelling Parts”, International Conference ‘Science in Technology’ SCinTE 2015, Athens, 5-7 November 2015

• Andrikopoulos, K.I., Voerakos, G., Tsainis, A.M., Papazafeiropoulos, G., Stergiou, C., Vairis, A., “Identification method of constitutive material parameters for additively manufactured structures using an inverse optimization strategy.”, ASME 2023 International Mechanical Engineering Congress and Exposition (IMECE 2023), 29 October-2 November 2023, New Orleans, USA.

• Statheas, N., Tsainis, A-M., Stergiou, C., Vairis, A., “Optimising AM components using experimental design and fuzzy logic systems”,  6th International Congress (IC-2024), 22-24 January 2024, Bengaluru