Montanari Domenico, Agostini Andrea, Bonini Marco, Corti Giacomo, Ventisette Chiara Del
Institute of Geosciences and Earth Resources, National Research Council of Italy (CNR), 50121 Florence, Italy.
Earth Sciences Department, University of Florence, 50121 Florence, Italy.
Materials (Basel). 2017 Jun 9;10(6):635. doi: 10.3390/ma10060635.
The behaviour of a granular material is mainly dependent on its frictional properties, angle of internal friction, and cohesion, which, together with material density, are the key factors to be considered during the scaling procedure of analogue models. The frictional properties of a granular material are usually investigated by means of technical instruments such as a Hubbert-type apparatus and ring shear testers, which allow for investigating the response of the tested material to a wide range of applied stresses. Here we explore the possibility to determine material properties by means of different empirical methods applied to mixtures of quartz and K-feldspar sand. Empirical methods exhibit the great advantage of measuring the properties of a certain analogue material under the experimental conditions, which are strongly sensitive to the handling techniques. Finally, the results obtained from the empirical methods have been compared with ring shear tests carried out on the same materials, which show a satisfactory agreement with those determined empirically.
粒状材料的行为主要取决于其摩擦特性、内摩擦角和凝聚力，这些因素与材料密度一起，是在模拟模型缩放过程中需要考虑的关键因素。粒状材料的摩擦特性通常通过Hubbert型仪器和环剪试验仪等技术仪器进行研究，这些仪器能够研究被测材料在广泛的外加应力下的响应。在这里，我们探索通过应用于石英和钾长石砂混合物的不同经验方法来确定材料特性的可能性。经验方法具有在实验条件下测量特定模拟材料特性的巨大优势，而这些实验条件对操作技术非常敏感。最后，将经验方法获得的结果与对相同材料进行的环剪试验结果进行了比较，结果显示与经验测定结果吻合良好。
