Effect of velocity on roll/slip for low and high load conditions in polymer composite

In the last decade polymer composites are often used without lubrication on both low and highspeed applications. Some of the application areas are marine, automotive and agriculture used as bearingsand cams where roll-slip is the dominant mechanism. Limited studies are made for composites relatingsuch applications where rolling/sliding condition influences the tribological behavior of the material.Investigating the roll-slip phenomenon for identifying the influence of velocity on frictional behavior canmark a boundary to map the use of composites with respect to its application. Moreover, the design of thematerial can be optimized to match the operating conditions. In the current research the polymer composite(with polyester matrix) has been tested under rolling-sliding condition for two different loads with 61N and210N and with different speeds ranging from 10 rpm to 700 rpm. Ideal conditions in terms of roughness, slipratio, surface temperature and ambient temperature were maintained to reduce the frictional heating. Usinga 20% slip ratio the behavior of the material was observed for the tribological characteristics where the rateof increase of friction force follows a exponential pattern with increasing speeds. Nevertheless, on testingwith high speeds a steady rate of increase in the friction curve was observed. Friction behavior ofcomposites under different speeds is briefed with the microstructural characteristics for low and high loads.