Influence of Fibre Orientation on Friction and Sliding Wear Behaviour of Jute Fibre Reinforced Polyester Composite
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Influence of Fibre Orientation on Friction and Sliding Wear Behaviour of Jute Fibre Reinforced Polyester Composite U. K. Dwivedi & Navin Chand
Received: 5 July 2008 / Accepted: 23 December 2008 / Published online: 13 January 2009 # Springer Science + Business Media B.V. 2009
Abstract Jute fibre reinforced polyester composites were developed and characterized for friction and sliding wear properties. Effect of fibre orientation and applied load on tribological behaviour of jute fibre reinforced polyester composites were determined. It is found that wear resistance was maximum in TT sample, where fibres were normal to sliding direction. Wear rate under sliding mode follows this trend; WTT < WLT LL>LT
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Fig. 4 Maximum temperature attained during sliding surfaces vs loads for jute polyester composite
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Appl Compos Mater (2009) 16:93–100
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Figure 4 shows the plots between load and maximum temperature attained during sliding for the above three types of jute polyester composites. The temperature increased with increase in the load, because frictional heat increases on increasing the load. Highest temperature is found in case of TT sample, which is direct linked with coefficient of friction.
Fig. 5 a Plots between the friction coefficients and time for LL, LT and TT composites at 19.6 N load. b Plots between the friction coefficients and time for LL sample at different normal load. c Plots between the friction coefficients and time for TT sample at different normal load
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Appl Compos Mater (2009) 16:93–100
Figure 5a shows the plots between coefficient of friction and time for different samples at 20 N load. This figure exhibits highest value of coefficient of friction for TT sample followed by the LL and LT samples. This is because TT sample has fibres normal to the sliding direction and gave maximum resistance to the movement of counterface. Figure 5b shows the curves for coefficient of friction with time for LL sample at different loads ranging from 20 N to 50 N. Initially the coefficient of friction reaches to maximum value then begins to decrease and finally become stabilized. This peak value shifts to left side as load is increased; this exhibits the point of maximum real contact. At maximum applied load (50 N), coefficient of friction found minimum. Figure 5c shows the variation of coefficient of friction with time for TT sample at different applied loads which is analogous to the Fig. 5b. Shifting of peak value of the coefficient of friction with load is observed in this case also as was found for LL sample. However, the values found are higher as compared to LL sample at the corresponding loads. Figure 6a, b, c, d show SEM micrographs of worn surface of LL sample under sliding motion at different magnifications where fibre direction and sliding direction were parallel. Fibre’s cell debonded on the application of shear. Micro-pitting is observed on the worn surface. Separated fibre boundary is clearly
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