The production of binderless granules and their mechanical characteristics
The production of binderless granules and their mechanical characteristics
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DOI：
10.1016/j.ces.2005.02.033
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发表时间：
2005-07-01
影响因子：
4.7
通讯作者：
Salman, AD
中科院分区：
文献类型：
--
作者：
Cheong, YS;Adams, MJ;Salman, AD
描述了从球形聚苯乙烯胶体制备模型无粘合剂颗粒的造粒程序。还研究了颗粒的变形和破碎行为。冲击和慢速直径压缩实验分别用于模拟颗粒在高应变率和低应变率下的机械响应。人们发现它们在以半脆性方式断裂之前会发生弹塑性变形。变形区域颗粒堆积的致密化或重新排列被认为是冲击和径向压缩下能量耗散的主要机制。此外，发现颗粒内组成颗粒的表面化学是控制强度的因素之一。 (c) 2005 Elsevier Ltd. 保留所有权利。
A granulation procedure is described for preparing model binderless granules from spherical polystyrene colloids. The deformation and breakage behaviour of the granules was also studied. Impact and slow diametrical compression experiments were used to simulate the mechanical response of the granules at high and low strain rates, respectively. They were found to deform elasto-plastically before fracturing in a semi-brittle manner. Densification or rearrangement of particle packing in the deformed region was concluded to be the main mechanism for energy dissipation under both impact and diametrical compression. In addition, the surface chemistry of the constituent particles within the granules was found to be one of the factors that govern the strength. (c) 2005 Elsevier Ltd. All rights reserved.