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Tobias Hultqvist
Tobias Hultqvist

Tobias Hultqvist

Machine Elements
Department of Engineering Sciences and Mathematics
tobias.hultqvist@ltu.se
+46 (0)920 493592
E840 Luleå

Briefly about me and my research: During the end of my MSc in Mechanical Engineering with specialisation in machine design, I had the opportunity to write my master’s thesis at the division of Machine Elements, where I dived into the interesting field of tribology. Here, I continued as a PhD student in a project related to crankshaft roller bearings under supervision of Professor Roland Larsson, where my main focus is simulation of elastohydrodynamic lubrication (EHL) under transient conditions.

Specialities: Machine elements; Tribology; Numerical simulations; Product development; Computer-aided design; Programming.

You can also find me on LinkedIn and ResearchGate.

Publications

Article in journal

Transient plasto-elastohydrodynamic lubrication concerning surface features with application to split roller bearings (2021)

Hultqvist. T, Vrček. A, Johannesson. T, Marklund. P, Larsson. R
Proceedings of the Institution of mechanical engineers. Part J, journal of engineering tribology, Vol. 235, nr. 2, s. 453-467
Article in journal

Tribological characterization of potential crankshaft bearing steels for roller bearing engines (2021)

Vrček. A, Hultqvist. T, Johannesson. T, Marklund. P, Larsson. R
Proceedings of the Institution of mechanical engineers. Part J, journal of engineering tribology, Vol. 235, nr. 7, s. 1365-1378
Conference paper

Analysis of Split Crankshaft Roller Bearings with Focus on Lubrication and Contact Stresses (2020)

Hultqvist. T, Vrček. A, Johannesson. T, Marklund. P, Larsson. R
Paper presented at : 22nd International Colloquium Tribology: Industrial and Automotive Lubrication
Article in journal

Corrigendum to “Elastohydrodynamic lubrication for the finite line contact under transient loading conditions” [Tribol Int 127 (2018) 489–499] (2020)

Hultqvist. T, Shirzadegan. M, Vrček. A, Baubet. Y, Prakash. B, Marklund. P, et al.
Tribology International, Vol. 150
Article in journal

Micro-pitting and wear characterization for different rolling bearing steels (2020)

Effect of hardness and heat treatments
Vrček. A, Hultqvist. T, Johannesson. T, Marklund. P, Larsson. R
Wear, Vol. 458-459
Conference paper

On the Effects of Two-Sided Roughness in Rolling-Sliding EHL Contacts. (2020)

Hultqvist. T, Hansen. J, Björling. M, Marklund. P, Larsson. R
Paper presented at : 22nd International Colloquium Tribology: Industrial and Automotive Lubrication
Article in journal

On Waviness and Two-Sided Surface Features in Thermal Elastohydrodynamically Lubricated Line Contacts (2020)

Hultqvist. T, Vrček. A, Marklund. P, Larsson. R
Lubricants, Vol. 8, nr. 6
Article in journal

Transient analysis of surface roughness features in thermal elastohydrodynamic contacts (2020)

Hultqvist. T, Vrček. A, Marklund. P, Prakash. B, Larsson. R
Tribology International, Vol. 141
Article in journal

Influence of lubricant pressure response on sub-surface stress in elastohydrodynamically lubricated finite line contacts (2019)

Hultqvist. T, Vrček. A, Prakash. B, Marklund. P, Larsson. R
Journal of tribology, Vol. 141, nr. 3
Article in journal

Micro-pitting and wear assessment of engine oils operating under boundary lubrication conditions (2019)

Vrček. A, Hultqvist. T, Baubet. Y, Björling. M, Marklund. P, Larsson. R
Tribology International, Vol. 129, s. 338-346
Article in journal

Micro-Pitting and Wear Assessment of PAO vs Mineral-Based Engine Oil Operating under Mixed Lubrication Conditions (2019)

Effects of Lambda, Roughness Lay and Sliding Direction
Vrček. A, Hultqvist. T, Baubet. Y, Björling. M, Marklund. P, Larsson. R
Lubricants, Vol. 7, nr. 5
Article in journal

Micro-pitting Damage of Bearing Steel Surfaces under Mixed Lubrication Conditions (2019)

Effects of Roughness, Hardness and ZDDP Additive
Vrček. A, Hultqvist. T, Baubet. Y, Marklund. P, Larsson. R
Tribology International, Vol. 138, s. 239-249
Conference paper

Contact mechanics and wear of self-lubricating polymer bearings used in hydropower applications (2018)

Rudnytskyj. A, Rodiouchkina. M, Hultqvist. T, Berglund. K, Larsson. R
Paper presented at : 18th Nordic Symposium on Tribology (NORDTRIB 2018), Uppsala, Sweden, June 18-21, 2018
Article in journal

Elastohydrodynamic lubrication for the finite line contact under transient loading conditions (2018)

Hultqvist. T, Shirzadegan. M, Vrček. A, Baubet. Y, Prakash. B, Marklund. P, et al.
Tribology International, Vol. 127, s. 489-499