AI 中文总结
研究含颗粒界面力学性能预测难题，以压缩颗粒筏通过局部收缩松弛为模型实验，证明存在可重复连续老化过程，发现老化特征、宏观与介观变化，虽微观起源存疑，但该实验为控制比较老化提供了简单方法。
AI 中文摘要
虽然含颗粒界面在许多自然和工业过程中起着核心作用，但预测其力学性能仍是一项重大挑战。这些系统将颗粒间接触赋予的颗粒特性与毛细相互作用产生的弹性行为结合在一起，使其对其历史非常敏感。通过将单轴压缩颗粒筏通过局部收缩的松弛作为模型实验，我们证明了可重复和连续老化过程的存在。前后压缩筏均观察到老化，其特征是颗粒迁移率和筏变形性逐渐增加。宏观变化如松弛程度可见，并与介观水平观察到的流动变化相关，包括颗粒通量增加、剪切带变宽和颗粒重排增强。虽然老化可明确归因于颗粒通过收缩的受限通道，但其微观起源仍属假设，结果表明颗粒周围的接触线可能会演变。除了为筏历史的影响提供新见解外，所提出的收缩流实验还提供了一种控制和比较不同颗粒组件老化的简单方法。
英文摘要
While particle-laden interfaces play a central role in many natural and industrial processes, predicting their mechanical properties remains a major challenge. These systems combine granular characteristics conferred by particle-particle contacts with elastic behavior originating from capillary interactions, making them very sensitive to their history. Using the relaxation of uniaxially compressed particle rafts through a local constriction as a model experiment, we demonstrate the existence of a reproducible and continuous aging process. Aging is observed for both front- and back-compressed rafts and is characterized by a progressive increase in particle mobility and raft deformability. Macroscopic changes are seen, for example, in the extent of relaxation and are correlated with flow modifications observed at the mesoscopic level among which are increased particle fluxes, broader shear zones and enhanced particle rearrangements. While aging can be attributed unambiguously to the constrained passage of the particles through a constriction, its microscopic origin remains hypothetical, the results suggesting that contact lines around the particles may evolve. Beyond providing new insight into the effects of raft history, the proposed constriction flow experiment offers a simple method to control and compare aging in different particulate assemblies.
