论文标题
循环载荷后沉浸式颗粒材料的迁移率
Mobility in immersed granular materials upon cyclic loading
论文作者
论文摘要
我们研究嵌入在浸入的颗粒包装中并经受循环载荷的物体的迁移率。在此目标中，我们使用浸入水中的玻璃珠和经受循环提升力的水平板进行了实验。在不同的循环力频率上进行的测试并振幅证明了三种移动性制度的发展，从而使板几乎保持不动，稳定或缓慢爬行。结果表明，当频率增加时，稳定的板升高可能会在较低的力量下发生。我们提出了基于力松弛实验以及对理论Visco-Elasto塑形机械类似物的迁移率响应的分析，对这种频率的行为进行解释。这些结果和分析指出，浸入颗粒材料中稳定载荷和环状载荷之间的迁移率响应固有差异。
We study the mobility of objects embedded in an immersed granular packing and subjected to cyclic loadings. In this aim, we conducted experiments using glass beads immersed in water and a horizontal plate subjected to a cyclic uplift force. Tests performed at different cyclic force frequencies and amplitudes evidence the development of three mobility regimes whereby the plate stays virtually immobile, moves up steadily or slowly creeps upwards. Results show that steady plate uplift can occur at lower force magnitudes when the frequency is increased. We propose an interpretation of this frequency-weakening behaviour based on force relaxation experiments and on the analysis of the mobility response of theoretical visco-elasto-plastic mechanical analogue. These results and analysis point out inherent differences in mobility response between steady and cyclic loadings in immersed granular materials.
