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Friction and wear studies on the aramid fibre based non-asbestos brake pads for wind-mill application
Vinitha Ranganathan, Gopinath Konchady, Shankar Krishnapillai
Published in
2010
Volume: 123-125
   
Pages: 101 - 104
Abstract
The increasing demands for indigenous non-toxic friction material for wind mill application with better braking properties is ever expanding and this has motivated the development of non-asbestos brake pads. As an alternative to asbestos friction materials, aramid fibre reinforced phenolic matrix friction composite was developed with fibre content varying from 0 to 7 wt %. Using pin type specimens, their friction and wear behaviour was evaluated against cast iron disc in a pin on disc testing apparatus. The test results at a constant load of 70 N and at two speeds of 1.5 m/s and 5 m/s showed that the coefficient of friction decreased with fibre content and sliding velocity, almost linearly. The wear rate also decreased with increase in fibre content but was following a polynomial relation of third order. A composition which gives frictional coefficient of 0.45 to 0.40 and a minimum wear rate is desirable for the application. The formulation containing 5 wt % aramid fibre exhibited friction in this range and its wear rate was almost closer to the minimal value. Hence, from friction and wear considerations an aramid fibre content of 5 wt % is ideal for this application. © (2010) Trans Tech Publications.
About the journal
JournalAdvanced Materials Research
ISSN10226680
Open AccessNo
Concepts (29)
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    ARAMID FIBRE
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    Coefficient of frictions
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    Constant loads
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    FIBRE CONTENT
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    FRICTION AND WEAR
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    FRICTION COMPOSITES
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    Frictional coefficients
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    MINIMAL VALUE
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    NON-ASBESTOS
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    PHENOLIC MATRIX
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    PIN ON DISC
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    POLYNOMIAL RELATIONS
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    Sliding velocities
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    Test results
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    TESTING APPARATUS
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    THIRD ORDER
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    Wear rates
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    WIND MILL
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    ASBESTOS
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    Brakes
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    CAST IRON
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    Fibers
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    Friction
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    FRICTION MATERIALS
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    Functional materials
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    Phenols
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    Tribology
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    Wear of materials
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    Fiber reinforced materials