Stress transmission in cemented bidisperse granular materials

Area of Science:

• Materials Science
• Physics
• Engineering

Background:

• Textured porous materials exhibit stress concentrations influencing fracture and fragmentation.
• Stress distribution is governed by porosity, particle contact networks, and stress chains.

Purpose of the Study:

• Analyze stress distributions in 2D bidisperse cemented granular packing.
• Investigate the impact of particle-size ratio, particle volumes, and cementing matrix on stress and texture.

Main Methods:

• Peridynamic simulations under tensile loading.
• Analysis of stress distributions and material texture.

Main Results:

• Small particle volume fraction significantly homogenizes stress by reducing porosity.
• Texture influences porosity and pore distribution, correlating with stress homogeneity in large particles.
• Most homogeneous stress distribution observed with largest size ratio and small particle volume fraction, due to cushioning effects.

Conclusions:

• Interplay between size polydispersity and cementing matrix is crucial for stress distribution in textured materials.
• Findings are significant for understanding the behavior of materials in grinding operations.