نوع مقاله : مقاله پژوهشی
نویسنده
دانشگاه صنعتی سیرجان
چکیده
کلیدواژهها
موضوعات
عنوان مقاله [English]
نویسنده [English]
Scrape tires pose a significant environmental challenge. One proposed management strategy is mixing soil with tire additives of various sizes. While numerous studies have investigated the properties of tires and soil-tire mixtures, numerical studies remain relatively scarce. This research aims to simulate the mixture's behavior realistically. Given the flexibility of rubber shreds, the irregular shape of sand grains, and the inherent heterogeneity of the mixture, the Discrete Element Method (DEM) was employed for simulation. This method allows for the simulation of geometric features and mechanical properties of individual particles and bulk behavior at the granular scale. The simulations were conducted using the YADE software. Rubber shreds measuring 80×40 mm were simulated in samples with volumetric rubber shred contents of 0%, 20%, 40%, 60%, and 80%. The triaxial tests with confining pressures of 100, 200, and 400 kPa were simulated and the results showed good agreement with existing literature. To investigate anisotropy, shear was applied in two directions: perpendicular to the rubber shred plane (z-direction) and parallel to it (y-direction). The results indicate that the shreds exhibits reinforcing action when loading is in z-direction. Furthermore, the contact number increases with the addition of rubber shreds. Although the peak friction angle consistently decreases with higher rubber content for both z and y directions, the sample with 40% rubber shreds exhibits the highest friction angle under residual stress conditions in the z-direction.
کلیدواژهها [English]
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