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arXiv 1306.5618cond-mat.softcond-mat.mes-hallcond-mat.mtrl-sci
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软玻璃材料弛豫时间谱的剪裁

Tailoring Relaxation Time Spectrum in Soft Glassy Materials

Manish Kaushal, Yogesh M. Joshi

摘要:

失平衡软材料的物理性质不仅与变形历史有关,而且与时间有关。在这项工作中,我们建议将这一主要缺点转化为增益通过施加控制变形场来定制流变性能。我们利用这样的事实,即一定大小的变形场可以防止老化的软玻璃质材料中的粒子占据能量阱达到一定深度,从而仅填充更深的阱。我们采用了两种不同的微观结构的软玻璃材料,并表明,在老化的同时,变形场的强度增加,导致弛豫时间的频谱变窄。我们相信,原则上,这种哲学可以通过改变性质和动力强度而普遍应用于不同种类的玻璃材料。

英文摘要:

Physical properties of out of equilibrium soft materials depend on time as well as deformation history. In this work we propose to transform this major shortcoming into gain by applying controlled deformation field to tailor the rheological properties. We take advantage of the fact that deformation field of a certain magnitude can prevent particles in an aging soft glassy material from occupying energy wells up to a certain depth, thereby populating only the deeper wells. We employ two soft glassy materials with dissimilar microstructures and demonstrate that increase in strength of deformation field while aging leads to narrowing of spectrum of relaxation times. We believe that, in principle, this philosophy can be universally applied to different kinds of glassy materials by changing nature and strength of impetus.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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