Coupled Eulerian-Lagrangian simulation of a modified direct shear apparatus for the measurement of residual shear strengths

The simulation of large-strain geotechnical laboratory tests with conventional Lagrangian finite element method (FEM) techniques is often problematic due to excessive mesh distortion. multiple reversal direct shear (MRDS) test can be used measure the residual strength soils in a setting. However, modelling and generally require advanced numerical methods accommodate large strains concentrated plane. In reality, when standard (DS) apparatus used, MRDS prone two major sources measurement error: load cap tilting specimen loss. These error make it difficult or even impossible correctly determine strength. This paper presents modified DS multi-reversal multi-stage method, simulated using coupled Eulerian-Lagrangian (CEL) environment. was successful evaluating equipment preventing both loss, while large-deformation behaviour that not readily FEM arbitrary Lagrangian-Eulerian (ALE) analysis. Thereafter, created for purpose analysing mixtures organic materials found an Australian clay. results obtained from CEL model combination show great improvement measured profiles compared those apparatus. setup ensures accurate material strengths are calculated, factor vital ensure appropriate soil analyses large-scale projects.