The Rubber-carbon black composite material-based product is the main matrix used in domestic and industrial applications in the last decades. This study proposes replacing the reinforcing carbon with matrix-neutral rubber with epoxy resins to reduce the carbon footprint and lower the environmental impact while enhancing the product's mechanical properties. Five additive percentages of carbon--epoxy, starting from 100-50% Carbon-black and 0-50% Epoxy, were studied using a hybrid experimental-numerical approach. Experimentally, the extension fatigue, flexural fatigue, and elongation modulus testing were completed using the universal testing machines with a low loading rate (quasi-static process). Numerical, the finite element analysis by the commercial software ABAQUS-SAE within the built-in hyperelastic constitutive model was utilized to visualize the full-field stresses. The experimental nominal stress-strain data was used as input for the numerical model, and Ogden's formula was applied to simulate the mechanical response of the specimens. The stress field and stress concentration of different experimental tests are given. The effect of increasing the additive epoxy on the rubber-
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