Reuniting Micro And Macro Mechanics In Sands: A Systematic Approach

由于土壤的颗粒性和自然成因，土壤行为是复杂的。需要考虑的因素很多，如压力、密度、颗粒破碎、热化学效应，因此工程师必须选择对设计重要的因素，并且很有可能做出错误的选择。对于沙子等颗粒较粗的土壤，颗粒方法越来越受欢迎，这种方法将沙子模拟为颗粒的集合体而不是连续体。微观力学的研究已经变得非常复杂，但很少提供从颗粒表征到微观力学再到宏观行为的完整联系的线索，微观-宏观联系薄弱。该项目将解决长期存在的研究目标，即采用实验和数值方法更系统地将微观与宏观联系起来，以深入研究砂粒特性、接触力学与真实接触区域、宏观行为与宏观组构以及微观与宏观之间的联系。

Soil behaviour is complex due to their particulate nature and natural origins. There are many factors to consider, such as pressure, density, particle breakage, thermo-chemical effects, so that the engineer necessarily has to select which are important for the design, with the high likelihood of making the wrong choice. For coarser grained soils such as sands, particulate methods, which model the sand as an assembly of grains rather than a continuum, are increasingly popular. Research on micromechanics has become very sophisticated, but it rarely provides the complete connected thread from the particle characterisation, through the micromechanics to the macroscopic behaviour, and the micro-macro link is tenuous. This project will tackle the long-existing research aim of linking micro to macro in a more systematic manner, using experimental and numerical approaches, for in-depth investigations of sand grain characteristics, contact mechanics and real contact area, macro-behaviour and macro-fabric, and the link between micro and macro.