Title homogenizing residual stress of heterogeneous component based on vibration stress relief

The heterogeneous component inevitably produced non-homogenization residual stress during the assembly process. As time goes on, the residual stress decreased continuously and consequently resulted in non-homogenization stress relaxation. This phenomenon affected the long-term stability of the component. Meanwhile, the heterogeneous component was unsuited to be processed by thermal stress relief. For this phenomenon, finite element simulation was used. First, the heterogeneous component residual stress distribution was simulation. Second, the change of heterogeneous component residual stress was to study under natural stress relief. Final, the vibration frequency and amplitude were given through the modal and the harmonic response analysis, and the change of heterogeneous component residual stress under vibration stress relief was researched through the transient dynamic analysis. Simulation results show that residual stress achieves stable after one year under natural stress relief. While residual stress achieves stable in the initial few cycle under vibration stress relief. So comparatively analyzing the simulation results, it is shown that vibration stress relief based on plastic deformation theory is a fast effective to residual stress homogenization.