触变性与黏弹性：时间的问题

中文摘要 AI 辅助

触变性和黏弹性材料都保留其变形历史，难以区分。然而，稳态线性响应满足Kramers-Kronig关系。在扫描过程中演化的结构使频谱与这些关系不一致，因此来自单个chirp的残差且无需模型即可测量非平稳性。该残差在小振幅极限下仍然存在，在任何稳态下恢复到基线，并且对于有界重构，在结构时间附近达到峰值。我们在八个模型上验证了这一点，并在一个触变性二氧化硅悬浮液的已发表频谱上进行了演示。

英文摘要

Thixotropic and viscoelastic materials both retain their deformation history and are difficult to distinguish. However, a stationary linear response obeys the Kramers-Kronig relations. A structure that evolves during a sweep renders the spectrum inconsistent with them, so the residual from one chirp and no model measures nonstationarity. It survives the small-amplitude limit, returns to its baseline at any stationary state, and, for bounded restructuring, peaks near the structural time. We verify this on eight models and demonstrate it on published spectra of a thixotropic silica suspension.

发表机构

• Monash University（莫纳什大学）
• Bioresource Processing Institute of Australia (BioPRIA)（澳大利亚生物资源加工研究所）

机构由 AI 辅助整理，请以论文原文为准。