A breakage matrix methodology to predict particle size evolution of dyed calcareous sands
A breakage matrix methodology to predict particle size evolution of dyed calcareous sands
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DOI：
10.1016/j.powtec.2022.117626
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发表时间：
2022-06
影响因子：
5.2
通讯作者：
Sheng Zhang;Jia-lu Wang;Chenxi Tong
中科院分区：
文献类型：
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作者：
Sheng Zhang;Jia-lu Wang;Chenxi Tong
破碎引起的颗粒尺寸分布演化对颗粒材料的力学行为有很大的影响，是岩土工程领域的一个重要问题。本文提出了一种破碎矩阵的方法来研究PSD的演变与详细的破碎信息的每个单一尺寸的颗粒通过进行一维压缩试验染色钙质砂与不同的初始条件。利用PCAS图像识别技术，分析了不同初始条件下多粒径土样中各单粒径颗粒的破碎情况。研究发现，无论土样的初始PSD如何，土样中单个粒径颗粒的破碎诱导PSD都趋于分形分布。此外，每个单一尺寸颗粒的颗粒破碎程度与每单位体积的输入功线性相关。最后，建立了均匀级配和间隙级配钙质砂的破碎矩阵，表明该模型具有令人满意的性能。
Breakage-induced evolution of particle size distribution (PSD) will greatly affect the mechanical behavior of granular materials, and has been an important concern in geotechnical engineering. This paper presents a breakage matrix approach to investigate the evolution of PSD with detailed breakage information of each single-sized particles via conducting one-dimensional compression tests on dyed calcareous sands with different initial conditions. The breakage of each single-sized particles of soil samples with multi-sized particles under different initial conditions was analysed by the PCAS image recognition technologies. It has been found that the breakage-induced PSD of each single-sized particles of the soil samples tends to be fractally distributed, regardless of their initial PSDs. Furthermore, the degree of particle breakage of each single-sized particles is linearly related with the input work per unit volume. Finally, the proposed model establishes the breakage matrices of both uniform and gap-graded calcareous sands, which demonstrates its satisfactory performance.