In order to explore the mechanical response characteristics of fractured sandstone under true triaxial different medium principal stresses, matdem particle flow software was used study characteristics, fracture mechanism and damage evolution specimens conditions 30 MPa, 40 MPa 50 respectively. The simulation results are verified by test. show that stress, increase stress is beneficial strength ...

Different rubber aggregates lead to changes in the effect of stress conditions on mechanical behavior concrete, and studies triaxial properties self-compacting concrete (SCRC) are rare. In this study, 35 cylindrical specimens taking lateral type as variables were prepared study fresh behaviors SCRC under compression, where contains two types, i.e., 380 μm powder 1–4 mm particles, four contents,...

The goal is to determine the constitutive behavior of granular packings under various deformations (isotropic and anisotropic) from particle simulations. For this we consider deformations, stress, structure and the contact forces as the basis. In a previous study [6,7] we investigated using DEM, the evolution of the coordination number (and the packing structure) and pressure as functions of th...

Abstract To accurately predict coal burst hazards and estimate the failure of pillars in underground mining systems, it is great significance to understand mechanical behavior coal-rock bimaterial composite structures. This paper presents experimental numerical investigations on response rock-coal, coal-rock, rock-coal-rock structures under triaxial compression. The compression experiments are ...

Residual stress present in coupons used for fracture testing will influence the experimental determination of fracture toughness. Triaxial residual stress (e.g., due to welding) can alter both the driving force for fracture and the crack-tip constraint at a specified load, so that the apparent toughness of a coupon depends on the residual stress present. In this paper, we employ a micromechanic...