Strengthening and Toughening Simulation Analysis of the Two-Phase Microstructures with Different Patterns

This study investigates two-dimensional composites with Cu/Ni laminated and brick-mortar structures using the GTN constitutive model and mathematical plane tessellation schemes. Uniaxial and biaxial stretching behaviors are analyzed by precisely controlling the model microgeometries through finite element numerical simulations. The results indicate that the laminated structure, represented by triangular tessellation models, exhibits stretching-dominated deformation when uniaxial stretching is applied along the direction of the hard phase laminae, demonstrating exceptional strength. In contrast, the brick-mortar structure, also represented by triangular tessellation models, undergoes deformation through a combination of bending and stretching (compression), enhancing plasticity while maintaining significant strength. By examining the relationship between microstructure and mechanical properties in these two-phase composites, this study provides valuable insights for material synthesis through structural patterning.