Abstract Particle kinematics including particle translation and particle rotation, plays a very important role in the shearing behavior of granular soils. In this study, a particle-tracking method based on particle volume (or particle surface area) is presented in detail and applied to the acquisition of particle kinematics of a uniformly graded sands undergoing shearing in a mini-triaxial apparatus using the X-ray synchrotron radiation technique. The effectiveness of this method, and the effects of different tracking criteria (i.e., particle volume and particle surface area) and tracking parameters on its tracking performance are examined. It is found that the particle tracking based on the two tracking criteria provides consistent results of particle kinematics with high accuracy, given that appropriate tracking parameters are used. The presented particle-tracking approach and the research findings will be useful for the measurement and quantification of particle-scale kinematics of granular materials.

中文翻译：

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三轴压缩下砂粒运动学实验研究的粒子追踪方法

摘要 粒子运动学包括粒子平移和粒子旋转，在颗粒土的剪切行为中起着非常重要的作用。在这项研究中，详细介绍了一种基于颗粒体积（或颗粒表面积）的颗粒跟踪方法，并将其应用于使用 X 射线同步加速器在微型三轴装置中进行剪切的均匀级配砂的颗粒运动学采集辐射技术。检验了该方法的有效性，以及不同跟踪标准（即粒子体积和粒子表面积）和跟踪参数对其跟踪性能的影响。发现基于两个跟踪准则的粒子跟踪提供了具有高精度的粒子运动学的一致结果，前提是使用了适当的跟踪参数。