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Filler-reinforcement of elastomers viewed as a triboelastic phenomenon.pdf
International Journal of Solids and Structures 40 (2003) 4549–4562 /locate/ijsolstr
Filler-reinforcement of elastomers viewed as a triboelastic phenomenon
V.V. Moshev *, S.E. Evlampieva 1
Institute of Continuous Media Mechanics, Russian Academy of Science, Academic Korolev Street 1, 614013 Perm, Russia Received 13 June 2002; received in revised form 17 February 2003
Abstract A triboelastic approach is o?ered for modeling the reinforcement phenomenon in particulate elastomeric composites.
The structural unit is composed of two solid substrates, modeling the surface of ?ller particles, and an adjoining nonlinear elastic spring, modeling a rubber molecule adsorbed by the surfaces of substrates. The strength of the adhesive bond is represented as a speci?ed frictional resistance appearing when the string is sliding along the substrate. The tensile curve of this model gives a clearer insight into the reinforcement mechanism, which may by regarded as the frictional resistance experienced by the spring on its sliding along the substrates at lower and moderate deformations. ó 2003 Elsevier Ltd. All rights reserved.
Keywords: Particulate elastomeric composites; Reinforcement mechanism
1. Introduction
It is well known that the solid tiny particles of a micron size or less incorporated into rubber matrices increase considerably the modulus and tensile strength of such particulate composites while retaining and sometimes even enhancing their high breaking deformations.
The mechanism of this e?ect discovered about 90 years ago and widely used in industry remains unclear until now. In spite of huge experience gained by chemists, physicists and mechanicians in a search for its foundation, it remains at a level of qualitative explanations not substantiated by an appropriate quantitative modeling (Alexandrov and Lazurkin, 1944; Mullins, 1987; Song, 1987; Medalia, 1987; Edwards, 1990).
This paper represents an attempt to develop a mathematical model based on the concepts evolved by A
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