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首页> 外文期刊>EPJ Web of Conferences >Investigation into macroscopic and microscopic behaviors of wet granular soils using discrete element method and X-ray computed tomography
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Investigation into macroscopic and microscopic behaviors of wet granular soils using discrete element method and X-ray computed tomography

机译：用离散元法和X射线计算机断层摄影技术研究湿粒状土壤的宏观和微观行为

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摘要

We present an investigation into macroscopic and microscopic behaviors of wet granular soils using the discrete element method (DEM) and the X-ray Computed Tomography (XRCT) observations. The specimens are first prepared in very loose states, with frictional spherical grains in the presence of a small amount of an interstitial liquid. Experimental oedometric tests are carried out with small glass beads, while DEM simulations implement a model of spherical grains joined by menisci. Both in experiments and in simulations, loose configurations with solid fraction as low as 0.30 are prepared under low stress, and undergo a gradual collapse in compression, until the solid fraction of cohesionless bead packs (0.58 to 0.6) is obtained. In the XRCT tests, four 3D tomography images corresponding to different typical stages of the compression curve are used to characterize the microstructure.
机译：我们目前使用离散元方法（DEM）和X射线计算机断层扫描（XRCT）观察对湿颗粒土壤的宏观和微观行为进行研究。首先在非常松散的状态下制备样品，并在少量填隙液的存在下用摩擦球形颗粒制备样品。用小玻璃珠进行实验性测风量测试，而DEM模拟则采用半月板连接的球形颗粒模型。在实验和模拟中，均在低应力下制备了固体含量低至0.30的松散构型，并在压缩过程中逐渐塌陷，直到获得无粘性珠粒包装的固体含量（0.58至0.6）。在XRCT测试中，对应于压缩曲线不同典型阶段的四个3D断层扫描图像用于表征微结构。

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