Shear and compressive rheology of aggregated alumina suspensions
Shear and compressive rheology of aggregated alumina suspensions
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DOI：
10.1002/aic.690430707
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发表时间：
1997-07
期刊：
影响因子：
3.7
通讯作者：
Glenn M. Channell;C. Zukoski
中科院分区：
文献类型：
--
作者：
Glenn M. Channell;C. Zukoski
聚集的氧化铝颗粒的剪切和压缩性能被确定为体积分数和颗粒间吸引力的强度的函数。在一定的体积分数范围内，屈服应力τy、弹性模量、限定线弹性响应范围的应变和压缩屈服应力Py可以用体积分数的幂律函数很好地描述，而颗粒间吸引力的作用可以通过将这些力学性能表示为（μ g/μ g − 1）n来解释，其中μ g捕获颗粒吸引力的强度，n是微观结构。压缩和剪切性能之间的联系很好地描述了线性弹性模型，其中Py和τy是泊松比的函数，对于所研究的悬浮液，其值接近0.49。
The shear and compressive properties of aggregated alumina particles are determined as functions of volume fraction and the strength of the interparticle attraction. Over a range of volume fractions, yield stresses, τy, elastic moduli, the strain delimiting the extent of the linear elastic response, and compressive yield stress, Py, are well described by power-law functions of volume fraction, while the role of interparticle attractions can be accounted for by expressing these mechanical properties as (ϕ/ϕg − 1)n, where ϕg captures the strength of particle attractions and n the microstructure. The links between compressive and shear properties are well described by linear elastic models where the Py and τy are a function of Poisson's ratio which, for the suspensions investigated, has a value near 0.49.