Stress-Strain-Volume Change Modeling of Delhi Silt in Triaxial Compression and Extension

Abstract This study investigates the drained stress-strain-volume change behavior of Delhi silt under triaxial compression and extension loading conditions using two different existing constitutive models, the hardening soil (HS) model and a hierarchical single surface (HISS) model. The HISS model is shown to be able to capture the stress-strain-volumetric response in both compression and extension loadings with higher accuracy as compared with the HS model.