Ulf Olofsson

Ulf Olofsson

Professor i Tribologi

Telefon: +46(0)8-790 63 04
E-post: ulf.olofsson@itm.kth.se
Besöksadress: Brinellvägen 83

Forskning

Main interest include interfaces and especially simulation and prediction of friction and wear, mainly applied to problems in railways, automotive and mechanical engineering. Recent research interest includes human touch tribology and airborne wear particles generated from contacts as disc brakes and tire to road interaction.

Undervisning

Tribology MF2018
Robust and probabilistic design MF2024

Curriculum Vitae

Education and degrees

1987, Master of Science, Royal Institute of Technology.
1994, Licentiate of Engineering, Chalmers University of Technology.
1996, Doctor of Engineering, Royal Institute of Technology.
2001, Docent, Royal Institute of Technology.

Professional career

1987-1993 Research engineer, Swedish National Testing and Research Institute.
1994-1996 Research Assistant, Department of Machine Design, KTH.
1996-2001 Research Associate, Department of Machine Design, KTH.
2002-2005 Post doctoral Fellow, Department of Machine Design, KTH.
2006 - Professor in Tribology, Department of Machine Design, KTH.

Ulf Olofsson CV Résumé (pdf 38 kB)

Publikationer

Licentiate thesis

Olofsson U., Friction charaterization during micro-slip and gross-slip in reciprocating motion, Report No. 1994-05-18, Machine and Vehicle Design, CTH 412 96 Göteborg.

Ph.D. thesis

Olofsson U., Friction and wear characterisation of revolving contacts, TRITA-MMK 1996:11, Stockholm (1996).

Publications in refereed international journals

1.    Zhu Y, Olofsson U, Nilsson R, A field test study of leaf contamination on the rail head surfaces, (2013)  In press, IMechE Part F: J. of Rail and Rapid Transit

2.    Olofsson U,  Zhu Y, Löfving S, Casselgren J, Mayer L, Nilsson R, An optical sensor for the identification of low adhesion in the wheel rail contact, (2013) In press Journal of Railway Technology

3.    Abbasi S, Jansson A, Olofsson U, Sellgren U, Particle emissions from rail traffic: A literature review, proceeding Critical Reviews in Environmental Science and Technology (2012), In press.

4.    Olofsson, U., Olander, L. On the identification of wear modes and transitions using airborne wear particles (2013) Tribology International, 59, pp. 104-113.

5.    Zhu, Y., Olofsson, U., Söderberg, A. Adhesion modeling in the wheel-rail contact under dry and lubricated conditions using measured 3D surfaces (2013) Tribology International, 61, pp. 1-10.

6.    Abbasi, S., Olofsson, U., Zhu, Y., Sellgren, U. Pin-on-disc study of the effects of railway friction modifiers on airborne wear particles from wheel-rail contact (2013) Tribology International, 60, pp. 136-139.

7.     Lewis S, Lewis R, Olofsson U, Eadie D, Cotter J  Lu X., Effect of humidity, temperature and railhead contamination on the performance of friction modifiers: Pin-on-disk study, Proc IMechE Part F: J Rail and Rapid Transit 227(2) 115–127

8.    Lewis R, Lewis S, Zhu Y, Abbasi S, Olofsson U., The modification of a slip resistance meter for measurement of railhead adhesion, Proc IMechE Part F: J Rail and Rapid Transit 227(2) 196–200

9.    Bergseth, E., Olofsson, U., Lewis, R., Lewis, S. Effect of gear surface and lubricant interaction on mild wear (2012) Tribology Letters, 48 (2), pp. 183-200.

10.    Zhu, Y., Olofsson, U., Persson, K. Investigation of factors influencing wheel-rail adhesion using a mini-traction machine (2012) Wear, 292-293, pp. 218-231.

11.    Wahlström, J., Olander, L., Olofsson, U. A pin-on-disc study focusing on how different load levels affect the concentration and size distribution of airborne wear particles from the disc brake materials (2012) Tribology Letters, 46 (2), pp. 195-204.

12.    Abbasi, S., Jansson, A., Olander, L., Olofsson, U., Sellgren, U. A pin-on-disc study of the rate of airborne wear particle emissions from railway braking materials (2012) Wear, 284-285, pp. 18-29.

13.    Abbasi, S., Olander, L., Larsson, C., Olofsson, U., Jansson, A., Sellgren, U. A field test study of airborne wear particles from a running regional train
(2012) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 226 (1), pp. 95-109.

14.    Wahlström, J., Gventsadze, D., Olander, L., Kutelia, E., Gventsadze, L., Tsurtsumia, O., Olofsson, U. A pin-on-disc investigation of novel nanoporous composite-based and conventional brake pad materials focussing on airborne wear particles (2011) Tribology International, 44 (12), pp. 1838-1843.

15.    Abbasi, S., Wahlström, J., Olander, L., Larsson, C., Olofsson, U., Sellgren, U. A study of airborne wear particles generated from organic railway brake pads and brake discs (2011) Wear, 273 (1), pp. 93-99.

16.    Sjöberg, S., Björklund, S., Olofsson, U. The influence of manufacturing method on the running-in of gears (2011) Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 225 (10), pp. 999-1012.

17.    Tornehed, P., Olofsson, U. Lubricant ash particles in diesel engine exhaust. Literature review and modelling study (2011) Proceedings of the Institution of Mechanical Engineers, Part D: Journal of Automobile Engineering, 225 (8), pp. 1055-1066.

18.    Houghton, A., Lewis, R., Olofsson, U., Sundh, J. Characterising and reducing seizure wear of inconel and incoloy superalloys in a sliding contact (2011) Wear, 271 (9-10), pp. 1671-1680.

19.    Wahlström, J., Söderberg, A., Olofsson, U. A cellular automaton approach to numerically simulate the contact situation in disc brakes (2011) Tribology Letters, 42 (3), pp. 253-262.

20.    Sundh, J., Olofsson, U. Relating contact temperature and wear transitions in a wheel-rail contact (2011) Wear, 271 (1-2), pp. 78-85.

21.    Lewis, S.R., Lewis, R., Olofsson, U. An alternative method for the assessment of railhead traction (2011) Wear, 271 (1-2), pp. 62-70.

22.    Olofsson, U. A study of airborne wear particles generated from the train traffic-Block braking simulation in a pin-on-disc machine (2011) Wear, 271 (1-2), pp. 86-91.

23.    Skedung, L., Danerlöv, K., Olofsson, U., Michael Johannesson, C., Aikala, M., Kettle, J., Arvidsson, M., Berglund, B., Rutland, M.W. Tactile perception: Finger friction, surface roughness and perceived coarseness (2011) Tribology International, 44 (5), pp. 505-512.

24.    Tornehed, P., Olofsson, U. Towards a model for engine oil hydrocarbon particulate matter (2010) SAE International Journal of Fuels and Lubricants, 3 (2), pp. 543-558.

25.    Jansson, A., Olander, L., Olofsson, U., Sundh, J., Söderberg, A., Wahlström, J. Ultrafine particle formation from wear (2010) International Journal of Ventilation, 9 (1), pp. 83-88.

26.    Wahlström, J., Olander, L., Olofsson, U. Size, shape, and elemental composition of airborne wear particles from disc brake materials (2010) Tribology Letters, 38 (1), pp. 15-24.

27.    Wahlström, J., Söderberg, A., Olander, L., Jansson, A., Olofsson, U. A pin-on-disc simulation of airborne wear particles from disc brakes (2010) Wear, 268 (5-6), pp. 763-769.

28.    Skedung, L., Danerlöv, K., Olofsson, U., Aikala, M., Niemi, K., Kettle, J., Rutland, M.W. Finger friction measurements on coated and uncoated printing papers (2010) Tribology Letters, 37 (2), pp. 389-399.

29.    Lewis, R., Dwyer-Joyce, R.S., Olofsson, U., Pombo, J., Ambrósio, J., Pereira, M., Ariaudo, C., Kuka, N. Mapping railway wheel material wear mechanisms and transitions (2010) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 224 (3), pp. 125-137.

30.    Wahlström, J., Söderberg, A., Olander, L., Olofsson, U., Jansson, A. Airborne wear particles from passenger car disc brakes: A comparison of measurements from field tests, a disc brake assembly test stand, and a pin-on-disc machine (2010) Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 224 (2), pp. 179-188.

31.    Olofsson, U., Olander, L., Jansson, A. Towards a model for the number of airborne particles generated from a sliding contact (2009) Wear, 267 (12), pp. 2252-2256.

32.    Olofsson, U., Olander, L., Jansson, A. A study of airborne wear particles generated from a sliding contact (2009) Journal of Tribology, 131 (4), pp. 1-4.

33.    Wahlström, J., Söderberg, A., Olander, L., Olofsson, U. A disc brake test stand for measurement of airborne wear particles (2009) Lubrication Science, 21 (6), pp. 241-252.

34.    Sundh, J., Olofsson, U., Olander, L., Jansson, A. Wear rate testing in relation to airborne particles generated in a wheel-rail contact (2009) Lubrication Science, 21 (4), pp. 135-150.

35.    Bersgseth, E., Torbacke, M., Olofsson, U. Wear in environmentally adapted lubricants with AW technology (2008) Journal of Synthetic Lubrication, 25 (4), pp. 137-158.

36.    Sundh, J., Olofsson, U., Sundvall, K. Seizure and wear rate testing of wheel-rail contacts under lubricated conditions using pin-on-disc methodology (2008) Wear, 265 (9-10), pp. 1425-1430.

37.    Sundh, J., Olofsson, U. Seizure mechanisms of wheel-rail contacts under lubricated conditions using a transient ball-on-disc test method (2008) Tribology International, 41 (9-10), pp. 867-874.

38.    Andersson, S., Söderberg, A., Olofsson, U. A random wear model for the interaction between a rough and a smooth surface (2008) Wear, 264 (9-10), pp. 763-769.

39.    Olofsson, U. A multi-layer model of low adhesion between railway wheel and rail (2007) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 221 (3), pp. 385-389.

40.    Nilsson, R., Dwyer-Joyce, R.S., Olofsson, U. Abrasive wear of rolling bearings by lubricant borne particles (2006) Proceedings of the Institution of Mechanical Engineers, Part J: Journal of Engineering Tribology, 220 (5), pp. 429-439.

41.    Nilsson, R., Svahn, F., Olofsson, U. Relating contact conditions to abrasive wear (2006) Wear, 261 (1), pp. 74-78.

42.    Marshall, M.B., Lewis, R., Dwyer-Joyce, R.S., Olofsson, U., Björklund, S. Experimental characterization of wheel-rail contact patch evolution (2006) Journal of Tribology, 128 (3), pp. 493-504.

43.    Nilsson, R., Olofsson, U., Sundvall, K. Filtration and coating effects on self-generated particle wear in boundary lubricated roller bearings(2005) Tribology International, 38 (2), pp. 145-150.

44.    Sjödin, U.I., Olofsson, U.L.-O. Experimental study of wear interaction between piston ring and piston groove in a radial piston hydraulic motor (2004) Wear, 257 (12 SPEC.ISS.), pp. 1281-1287.

45.    Telliskivi, T., Olofsson, U.Wheel-rail wear simulation (2004) Wear, 257 (11), pp. 1145-1153.

46.    Lewis, R., Olofsson, U. Mapping rail wear regimes and transitions (2004) Wear, 257 (7-8), pp. 721-729.

47.    Olofsson, U., Sundvall, K. Influence of leaf, humidity and applied lubrication on friction in the wheel-rail contact: Pin-on-disc experiments (2004) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 218 (3), pp. 235-242.

48.    Sjödin, U.I., Olofsson, U.L.-O. Initial sliding wear on piston rings in a radial piston hydraulic motor (2003) Wear, 254 (11), pp. 1208-1215.

49.    Olofsson, U., Telliskivi, T. Wear, plastic deformation and friction of two rail steels - A full-scale test and a laboratory study (2003) Wear, 254 (1-2), pp. 80-93.

50.    Olofsson, U., Nilsson, R. Surface cracks and wear of rail: A full-scale test on a commuter train track (2002) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 216 (4), pp. 249-264.

51.    Telliskivi, T., Olofsson, U. Contact mechanics analysis of measured wheel-rail profiles using the finite element method (2001) Proceedings of the Institution of Mechanical Engineers, Part F: Journal of Rail and Rapid Transit, 215 (2), pp. 65-72.

52.    Sjödin, U. Increased wear resistance of roller bearings using Me-C: H coated rollers (2000) Journal of Tribology, 122 (4), pp. 682-688.

53.    Olofsson, U., Andersson, S., Bjorklund, S. Simulation of mild wear in boundary lubricated spherical roller thrust bearings (2000) Wear, 241 (2), pp. 180-185.

54.    Sellgren, U., Olofsson, U. Application of a constitutive model for micro-slip in finite element analysis (1999) Computer Methods in Applied Mechanics and Engineering, 170 (1-2), pp. 65-77.

55.    Olofsson, U., Björklund, S. 3-D surface analysis of worn spherical roller thrust bearings (1998) International Journal of Machine Tools and Manufacture, 38 (5-6), pp. 485-493.

56.    Hagman, L.A., Olofsson, U. A model for micro-slip between flat surfaces based on deformation of ellipsoidal elastic asperities - Parametric study and experimental investigation (1998) Tribology International, 31 (4), pp. 209-217.

57.    Olofsson, U., Dizdar, S. Surface analysis of boundary-lubricated spherical roller thrust bearings (1998) Wear, 215 (1-2), pp. 156-164.

58.    Olofsson, U. An experimental investigation of wear and fatigue life reduction of boundary lubricated spherical roller thrust bearings (1997) Tribology International, 30 (9), pp. 685-692.

59.    Olofsson, U., Hagman, L. Model for micro-slip between flat surfaces based on deformation of ellipsoidal elastic bodies (1997) Tribology International, 30 (8), pp. 599-603.

60.    Olofsson, U. Characterisation of wear in boundary lubricated spherical roller thrust bearings (1997) Wear, 208 (1-2), pp. 194-203.

61.    Olofsson, U. Fatigue life reduction due to wear in boundary lubricated spherical roller thrust bearings (1997) Wear, 207 (1-2), pp. 74-78.

62.    Olofsson, U., Svensson, T., Torstensson, H. Response spectrum methods in tank-vehicle design (1995) Experimental Mechanics, 35 (4), pp. 345-351.

63.    Olofsson, U. Cyclic micro-slip under unlubricated conditions (1995) Tribology International, 28 (4), pp. 207-217.

64.    Olofsson, U., Holmgren, M. Friction measurement at low sliding speed using a servohydraulic tension-torsion machine (1994) Experimental Mechanics, 34 (3), pp. 202-207.

65.    Olofsson, U. Friction characteristics of a ferritic-austenitic stainless steel during lubricated reciprocating motion (1993) Wear, 170 (2), pp. 235-245.

66.    Olofsson, U., Ekerfors, L. Friction-induced noise in screw-nut transmissions
(1991) Wear, 148 (1), pp. 25-37.

Books and book chapters

1.    Olofsson U. and Lewis R., Tribology of the wheel-rail contact, in A Handbook of Railway Vehicle Dynamics ed. S. Iwnicki, Swets & Zeitlinger Publishers 2006.
2.    Olofsson U., Adhesion and friction modification, Wheel/rail interface handbook, ed. R. Lewis and U. Olofsson, Woodhead Publisher Limited 2009.
3.    Lewis R and Olofsson U., Basic tribology of the wheel rail contact, Wheel/rail interface handbook, ed. R. Lewis and U. Olofsson, Woodhead Publisher Limited 2009.
4.    Lewis R and Olofsson U. ed, Wheel/rail interface handbook, Woodhead Publisher Limited 2009.

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