Advances in Fundamental Studies on Partially Filled Tribological Gaps

• Autorzy: Mueller M. , Ostermeyer G. P.
• Języki publikacji: EN

Abstrakty

EN

Tribological scenarios with partially filled gaps can occur when either a lubricated system runs under starved lubrication or a system that usually operates under dry conditions is wetted by a fluid. In order to get a detailed insight into the tribological character of partially filled gaps, it is necessary to investigate the dynamics of the fluid flow and its interaction with the pressure, velocity, nominal gap height and deformations. Within this problem, the total amount of fluid in the gap plays a crucial role. Recent studies with novel models have shown that particularly near the fully filled regime the built up pressure is highly dependent on the filling ratio. Further studies proved that the fluid forms characteristic bow waves in front of asperities thus leading to larger mean pressure values in the contact. This paper extends these findings by experimental investigations on different length scales. Special focus is on the correlation between the friction coefficient and the supplied fluid volume.

Słowa kluczowe

EN

tribology; starved lubrication; experiments; length scale; friction coefficient

• Wydawca: Oficyna Wydawnicza Politechniki Warszawskiej
• Czasopismo: Machine Dynamics Research
• Rocznik: 2018
• Tom: Vol. 42, No. 3
• Strony: 5--15
• Opis fizyczny: Bibliogr. 6 poz., fot., tab., wykr.

Twórcy

autor

Mueller M.

• Technische Universitaet Braunschweig, Institute of Dynamics and Vibrations

autor

Ostermeyer G. P.

• Technische Universitaet Braunschweig, Institute of Dynamics and Vibrations

Bibliografia

• 1. Elrod, H. (1974). A computer program for cavitation and starvation problems. Cavitation and related phenomena in lubrication, 37.
• 2. Heshmat, H. (2010). Tribology of interface layers. CRC Press.
• 3. Müller, M., Jäschke, H., Bubser, F., and Ostermeyer, G.-P. (2014). Simulative studies of tribological interfaces with partially filled gaps. Tribology International, 78:195–209.
• 4. Müller, M., Völpel, A., and Ostermeyer, G.-P. (2017). On the influence of fluid dynamics and elastic deformations on pressure buildup in partially filled gaps. Tribology International, 105:345–359.
• 5. Ostermeyer, G.-P. and Brumme, S. (2017). The wear debris investigator – a new device for studying the formation of particles in the contact area. EuroBrake Paper EB2017-VDT-019.
• 6. Ostermeyer, G. P. and Perzborn, N. (2011). Dynamic friction measurements, especially for high power applications. Technical report, SAE Technical Paper.