Based on the interface shear tests, the macro- and meso-mechanical behaviors of interaction between coral sand and different structure surfaces are studied, in which CCD camera is used to capture digital images to analyze the evolution of the interaction band and a particle analysis apparatus is applied to studying the distribution characteristics of particle morphology. This study proposes four-stage evolution process based on the shear stress-strain curve. During the shear process, coral sand particles slide and rotate within the interaction band, causing the changes in shear stress and vertical displacement. In addition, the effects of structure surface roughness on shear strength, volume change and particle breakage are illustrated that the greater the roughness of slabs is, the larger the shear stress is, the more obvious the contraction effect is and the more the particles break. Furthermore, the change in particle’s 3D morphology during the breakage will change not only their size but also other morphological characteristics with convergence and self-organization.

在界面剪切试验的基础上，研究了珊瑚砂与不同结构表面相互作用的宏观和细观力学行为，其中使用CCD相机捕获数字图像以分析相互作用带的演化和粒子分析仪用于研究粒子形态的分布特征。该研究提出了基于剪切应力-应变曲线的四阶段演化过程。在剪切过程中，珊瑚砂颗粒在相互作用带内滑动和旋转，从而引起剪切应力和垂直位移的变化。此外，还显示了结构表面粗糙度对剪切强度，体积变化和颗粒破碎的影响，平板的粗糙度越大，剪切应力越大，收缩效果越明显，颗粒破裂越多。此外，在破裂过程中，粒子3D形态的变化不仅会改变其大小，还会随着会聚和自组织而改变其他形态特征。