Plastic stress singularity near interface edge of elasto-plastic/elastic bi-material

Abstract Stress field near the interface edge of Cu/Si bi-material is numerically analyzed under the small and large scale yielding conditions. Fifteen two-dimensional models with the different surface–interface angles and hardening exponents are used to investigate. The obtained results reveal that the elastic stress singularity order λel increases with increasing of the plastic surface–interface angle θ1 and the elastic surface–interface angle θ2, while the plastic stress singularity order λpl only increases in the range of 45° ⩽ θ1