FATIGUE CRACK GROWTH BEHAVIOR OF CARBON BLACK–REINFORCED NATURAL RUBBER

ABSTRACT Fatigue crack growth behavior of carbon black–reinforced natural rubber is investigated. Rubber compounds Shore A = 70 are prepared by varying the formulation loadings a wide range black types based on their structure and surface area properties. The resulting fatigue shows significant variation in β exponent values, depending properties black. These variations rationalized considering strain amplification aggregates region compound directly ahead tip. An assumption made that little networking exists this very high hydrodynamic calculations consider occluded can therefore provide realistic values for amplification. reasonable scaling power law parameters to calculated factors found, with exponent, β, decreasing increasing implication here enhanced promotes formation strain-induced crystallites tip region. Performance tradeoffs from crossover data sets dependent type discussed. Of practical significance fact be knowledge loading formulations.