Research on theoretical models of equivalent elastic constants for resin-mineral composite materials

Resin-mineral composite materials, as a class of important engineering materials, possess excellent mechanical properties and broad application prospects. The accurate prediction of their equivalent elastic constants is crucial for the design and application of these materials. This paper aims to delve into the equivalent elastic constants of resin-mineral composite materials, providing new insights for the design of these composites by combining theoretical analysis and experimental investigation. Initially, the homogenization concept of composite materials and Eshelby’s equivalent inclusion theory are employed to theoretically analyze the internal stress field of the composites, yielding explicit expressions for the equivalent elastic constants of resin-mineral composite materials. Subsequently, a series of resin-mineral composite specimens with varying volume fractions of constituent materials are fabricated and subjected to elastic property tests. The results indicate that the discrepancy between the experimental and theoretical equivalent elastic constants is approximately 10%, which substantiates the reliability of the theoretical analysis process. Finally, the influence of steel fiber and aggregate volume fractions on the equivalent elastic constants of resin-mineral composite materials is analyzed. These findings are of significant importance for optimizing the design of composite materials and enhancing their application performance.