3D Hopkinson bar: new experiments for dynamic testing on soils

TL;DR

This paper introduces a novel 3D Split Hopkinson Pressure Bar method for measuring the full three-dimensional dynamic response of soils, enhancing understanding of soil behavior under rapid loading.

Contribution

The paper presents an original experimental setup, the 3D SHPB, specifically adapted for soils, allowing comprehensive dynamic response measurements and comparison across different confinement systems.

Findings

Effective measurement of 3D soil response under dynamic loads

Comparison of results on sand and clay with existing studies

Insights into soil comminution processes at grain level

Abstract

The direct analysis of the dynamic response of materials is possible using Split Hopkinson pressure bar method. For soils, it has to be adapted since the specimen has generally poor mechanical properties. An original experimental arrangement called "Three-Dimensional Split Hopkinson Pressure Bar" (3D SHPB) is proposed. It allows the measurement of the complete three-dimensional dynamic response of soils. Different types of confinement systems are used. The results on different loading paths are compared with other works on sand and clay. The analysis at grain-size level gives further elements on the comminution process.