Frictional heating calculation based on tailored experimental measurements

Study of PTFE composites tribological behavior

“…In a previous study [13] the authors have found the increment in thermal conductivity and diffusivity of PTFE composites improve their wear resistance to adhesion. A direct dependence of wear resistance from the thermal properties of PTFE composite was found by Khedkar et al [9] and by the authors in [26]. Investigation on the effect of crystallinity on its fracture was presented by Brown et al [14] finding that the formation of fibrils and associated increase in fracture toughness is restricted by the increase in crystallinity, that is, by diminishing of molecular mobility.…”

Thermal analysis and tribological investigation on TPU and NBR elastomers applied to sealing applications

“…thermal equilibrium will be reached faster in the NBR. In the previous research on PTFE, the authors highlighted the importance of taking into account the variation of thermal properties along temperature [14,15]. In this case, it was seen that such variations along the temperature working range have negligible effect on the calculations.…”

“…In Ref. [14] it was demonstrated the importance of taking into account the variation of material thermal properties with temperature, however, in this case some calculations were performed and it was found that thermal properties variation is so small within the operating temperature range that it does not significantly influence the results. Fig.…”

“…Even if the contact area significantly affects the results obtained, there are no standard criterion and each model uses different approaches [9]. In the case of polymers, contact temperature estimations are even more complex as their thermo-mechanical properties are strongly influenced by temperature [10][11][12][13][14][15][16]. The importance of considering the evolution of material properties in the case of Polytetrafluoroethylene (PTFE) polymers has been already demonstrated [14,15].…”

“…In the case of polymers, contact temperature estimations are even more complex as their thermo-mechanical properties are strongly influenced by temperature [10][11][12][13][14][15][16]. The importance of considering the evolution of material properties in the case of Polytetrafluoroethylene (PTFE) polymers has been already demonstrated [14,15]. In particular, Tzanakis et al [12] studied the effect of roughness, friction coefficient, contact pressure and velocity on the flash temperatures generated on a PTFE composite elastomer tip seal in contact with a high carbon steel plate under dry sliding conditions.…”