Effect of Inherent Anisotropy on the Triaxial Compression Behavior of Coral Sand

Study on the interaction between particle shape and particle breakage of coral sand by discrete element method

“…Figure 8C shows the relationship between the internal friction angle and depositional angle. The internal friction angle decreases with increasing depositional angle, and this phenomenon is consistent with the findings of previous laboratory tests (Oda, 1972;Zeng and Liu, 2023b) and DEM simulation (Guo et al, 2022). The difference between the 0°and 90°i nternal friction angles of unbreakable agglomerates is greater than that of breakable agglomerates.…”

“…Furthermore, the particle size and shape distributions can be determined by the area of each fragment. Figure 2 shows a comparison of the initial particle size and shape distributions obtained by two-dimensional image analysis (Zeng and Liu, 2023a;Zeng and Liu, 2023b) and simulation. The particle size and shape of the crushable agglomerates in the simulation are close to those of actual coral sand particles.…”

“…It is well known that coral sand particles are usually irregular, porous, and fragile. The particle size and shape significantly change when particle breakage occurs, and the mechanical properties of coral sand are considerably affected (Rui et al, 2020;Xiao et al, 2022;Zeng and Liu, 2023a;Zeng and Liu, 2023b). Therefore, it is necessary to explore the interaction between particle shape and particle breakage and analyze their combined effects on the mechanical behavior of coral sand for better foundation designs in offshore and ocean engineering.Many studies have been conducted to investigate the influence of particle breakage on the mechanical properties and shape evolution of breakable granular materials.…”

“…However, studies comprehensively involving the interaction between particle shape and particle breakage and their combined effects on the mechanical behavior of granular materials are rare. Furthermore, irregular granular assemblies, especially coral sand particles, are often accompanied by inherent anisotropy phenomena during application (Oda, 1972;Arthur et al, 1977;Oda et al, 1978;Nakata et al, 1999;Yoshimine et al, 1998;Uthayakumar and Vaid, 1998;Guo et al, 2022;Zeng and Liu, 2023b). The effect of inherent anisotropy on the interaction between particle shape and particle breakage is nonnegligible but has rarely been studied.…”