Relationship between Surface Hardness and Peak Interfacial Frictional Coefficient in a Laboratory Scale Setting

This study aims to clarify the relationship between surface hardness and peak interfacial frictional coefficient under different particle sizes. The size with values has not been addressed in previous literature. A pile-soil shear test was conducted using a multifunctional instrument developed laboratory. influences of on characteristics interfaces interface friction were studied. results revealed that stress-shear displacement curves showed typical softening behavior when model pile smooth. difference curve for sizes gradually cleared as decreased. initial stiffness increased increasing decreased size. Furthermore, hard. However, soft, linear established.