摘要
To forecast the modification and evolution of a residual stress field in a butt-welded plate, the residual stress field was numerically evaluated by a finite element method code. The plate was originated by welding and suffered after chip- forming machining. The residual stress field was taken as a pre-stress condition for the next cutting simulations. Residual stress distribution after machining was then compared to that in the initial residual stress field. Numerical results have been compared to experimental measurements. That shows the potentiality as well as the limitations of numerical techniques. Three major contributions are summarized as follows ： Longitudinal residual stress distribution in welded plates is deeply changed by mechanical tooling; Planing and cutting increases peak values of transversal residual stress and in general introduces some unevenness in distribution along X-direction; Comparison of experimental and numerical values is generally satisfactory for longitudinal residual stress.
To forecast the modification and evolution of a residual stress field in a butt-welded plate, the residual stress field was numerically evaluated by a finite element method code. The plate was originated by welding and suffered after chip- forming machining. The residual stress field was taken as a pre-stress condition for the next cutting simulations. Residual stress distribution after machining was then compared to that in the initial residual stress field. Numerical results have been compared to experimental measurements. That shows the potentiality as well as the limitations of numerical techniques. Three major contributions are summarized as follows ： Longitudinal residual stress distribution in welded plates is deeply changed by mechanical tooling; Planing and cutting increases peak values of transversal residual stress and in general introduces some unevenness in distribution along X-direction; Comparison of experimental and numerical values is generally satisfactory for longitudinal residual stress.
