Finite element simulation study on optimizing the drawing performance of ZM20 magnesium alloy microtubes
The finite element simulation method is employed to simulate the drawing process of magnesium alloy microtubes at room temperature.Two different drawing proces-ses,namely hollow drawing and drawing with a core rod,are considered.By adjusting the strain rate,the effects on the mechanical properties and surface quality during the microtube drawing process are explored.The strain rate has a minor influence on the overall stress and strain in hollow drawing,whereas it significantly affects drawing with a core rod,particularly increasing strain at 3 s-1 and decreasing it at 11 s-1.With increasing strain rate,the flow velocity of microstructure in both processes increases,with more uniform microstructure flow observed in drawing with a core rod.During drawing,the external wall generally experiences higher stress than the internal wall,and drawing with a core rod promotes more uniform de-formation of the internal wall,thus improving precision.By optimizing the strain rate,the production efficiency and quality of medical-grade magnesium alloy microtubes can be effec-tively enhanced.
ZM20 magnesium alloymicrotube drawingfinite element simulationstrain ratemicrostructure flow
NETL
NSTL
万方数据
