Thermo-elasto-plastic phase-field modelling of mechanical behaviours of sintered nano-silver with randomly distributed micro-pores

Nano-silver paste is an emerging lead-free bonding material in power electronics, and has excellent mechanical properties, thermal conductivity long-term reliability. However, it extremely challenging to model the failure behaviours of sintered nano-silver due its random micro-porous structures coupled thermomechanical loading conditions. In this study, a novel computational framework was proposed generate simulate their effects on properties fracture behaviour based one-cut gaussian field thermo-elasto-plastic phase-field model. The elastic modulus, ultimate tensile strength strain are computed statistically, showing good agreement with experimental results. Further, applied under cyclic conditions, demonstrating formation distinctive crack patterns complex networks. cracking observed experiments simulations remarkably similar each other. implemented within Abaqus via combination subroutines Python scripts, automating process generation subsequent computation. This study provides efficient reliable approach structures.