The relationship of porosity and angle of repose to mixture proportions in assemblages of different sized materials
The relationship of porosity and angle of repose to mixture proportions in assemblages of different sized materials
复制标题
不同尺寸材料组合中孔隙率和休止角与混合物比例的关系
DOI：
10.1111/j.1365-3091.1974.tb01786.x
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发表时间：
1974
期刊：
影响因子：
--
通讯作者：
I. Statham
中科院分区：
文献类型：
--
作者：
I. Statham
玻璃球的混合物的旋转旋转实验表明，φR（剪切角度）受到混合物比例的强烈影响。在大颗粒之间，恰好是小型材料，这是由于在斜坡发展的地面上增加了剪切平面的扩张。讨论。
其次，实验的结果表明，尽管比φi更恒定（限制了安息角），但要经过一定的变化，即在旋转的滚筒中测量的φR并不是真正的常数，并且不能完全类似在剪切箱测试中测量的φ'CV（内部滑动摩擦的角度） - 先前已经提出。归因于φi的前面值的大小，因为异常高的值φi的值更喜欢较低的φr值，这是由于失败时释放的动能量大。
Rotating drum experiments on the repose angles of mixtures of glass spheres have shown that φr (angle of shear) is strongly influenced by the proportions of the mixture. It was found that φr reached a peak value for the minimum porosity mixture; where the pore spaces between the large particles were just filled with small material; which was attributed to increased dilatation on the shear plane during avalanching. The geomorphic significance of these observations, in terms of slope development, is discussed.
Secondly, the results of the experiments showed that, although more constant than φi (limiting angle of repose), φr was subject to some variation. Thus φr, as measured in a rotating drum, is not a true constant and can not be exactly analogous to φ'cv (angle of internal sliding friction at constant volume) as measured in a shearbox test—as has been previously suggested. It is tentatively suggested that at least some of the variability in φr is attributable to the magnitude of the immediately preceding value of φi, in that an unusually high value of φi, favours a lower value of φr due to the greater amount of kinetic energy released on failure.