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An Experimental and Theoretical Investigation of Stick-Slip, Steady-State and Roughness Dominated Sliding in Fiber-Reinforced Composites

  • Thomas J. Mackin (a1)

Abstract

The mechanical properties of fiber reinforced composites depends strongly upon the properties of the fiber/matrix interface. Enhanced fracture resistance and strain to failure are synonymous with debonding and sliding of the reinforcement phase. Thus, the two key properties of the composite are the interfacial toughness and the post-debond sliding stress. After debonding a variety of interfacial sliding phenomena are noted, including: stick-slip, steady-state, and roughness dominated sliding. The interfacial properties, including the coefficient of friction, the radial clamping pressure, asperity amplitude, the elastic properties of the constituents, and the compliance of the test machine, each play a role in the operative sliding phenomenon. Experiments have been conducted to explore each of these phenomena. In addition, models have been developed that rationalize all of the observed behavior.

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An Experimental and Theoretical Investigation of Stick-Slip, Steady-State and Roughness Dominated Sliding in Fiber-Reinforced Composites

  • Thomas J. Mackin (a1)

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