触变谱与Ashby风格触变图表
Thixotropic spectra and Ashby-style charts for thixotropy
AI总结：
提出基于触变谱的广义模型不敏感框架，通过指数应力模式叠加量化触变特性，并利用Ashby风格图表可视化低维度量，为跨微结构触变性描述和工程设计材料选择提供支持。
摘要：
目前尚无通用的触变模型，且比较不同流体间的触变效应是一个微妙而具挑战性的问题。我们提出了一种基于触变谱的广义（模型不敏感）比较框架。通过在触变时间尺度上分布的指数应力模式叠加，量化了在阶跃输入下的构建与破坏时间及模式强度。该数学框架在胶体悬浮液的几组实验阶跃剪切速率数据中进行了测试。基于分布矩的低维度量揭示了特征平均触变特性，并在Ashby风格图表中进行了可视化。该方法为描述跨越多种微结构的触变性提供了框架，支持科学研究及工程设计的材料选择。
英文摘要：
There is no universal model for thixotropy, and comparing thixotropic effects between different fluids is a subtle yet challenging problem. We introduce a generalized (model-insensitive) framework for comparing thixotropic properties based on thixotropic spectra. A superposition of exponential stress modes distributed over thixotropic timescales is used to quantify buildup and breakdown times and mode strengths in response to step-change input. This mathematical framework is tested with several experimental step-shear rate data on colloidal suspensions. Low-dimensional metrics based on moments of the distribution reveal characteristic average thixotropic properties which are visualized on Ashby-style diagrams. This method outlines a framework for describing thixotropy across a diverse range of microstructures, supporting scientific studies as well as material selection for engineering design applications.
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