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循环切割的合体凝:结构变化和延迟故障时间

Himangsu Bhaumik¹, James E Hallett², Tanniemola B Liverpool³

¹Yusuf Hamied Department of Chemistry, University of Cambridge, Lensfield Road, Cambridge CB2 1EW, UK.

|October 31, 2025

概括

循环切割的合体凝改变了它们的结构和机械性能. 根据剪切条件,凝可以变得更符合规则 (厚度) 或更硬 (应变硬化),影响其稳定性.

科学领域:

体科学是一种体科学.
软物质物理学软物质物理学
材料科学是一种材料科学.

背景情况:

体凝是复杂的液体,在食品,化品和药品中具有应用.
了解它们对机械应力的反应对于加工和稳定性至关重要.

研究的目的:

为了研究循环剪切下合凝的结构和机械变化.
探索剪切历史与凝行为之间的关系,包括厚度变异和应变硬化.

主要方法:

关于合物-聚合物混合物凝的实验研究.
计算机模拟使用模型凝-前身.
结构参数的分析 (拓集群分类,债券顺序参数,孔径大小分布).
机械反应分析 (压力,消散率,爬行流).

主要成果:

循环剪切会诱导凝的结构演变和孔隙大小的增加.
随着应变幅度的增加,观察到从弹性到塑性行为的交叉.
根据参数,凝表现出粗性 (增加合规性) 和应变硬化 (减少合规性).
预剪切的凝在持续的剪切应力下显示出更高的稳定性.
不同类型的结构特征由循环剪切打印,影响响应方向.

结论:

循环剪切显著改变了体凝的微观结构和质学.
观察到的厚度变异和应变硬化是对剪切历史的关键反应.
循环剪切引入的异位性在凝稳定性和流动行为中起着关键作用.

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