论文标题
触变的触变光谱和Ashby风格图表
Thixotropic spectra and Ashby-style charts for thixotropy
论文作者
论文摘要
没有用于触变拷贝的通用模型，并且比较不同流体之间的触变效应是一个微妙而又具有挑战性的问题。我们引入了一个广义（不敏感的）框架，用于比较基于触变光谱的触变特性。分布在触变时间尺度上的指数应力模式的叠加来响应响应阶跃变化输入来量化堆积和分解时间和模式强度。该数学框架已通过几种有关胶体悬浮液的实验剪切速率数据进行了测试。基于分布矩的低维指标揭示了在Ashby式图表上可视化的特征平均触变特性。该方法概述了一个框架，用于描述各种微观结构范围内的触变综合，支持科学研究以及工程设计应用的材料选择。
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.
