The Numerical Simulation for Extrusion Forming of Magnesium Alloy Pipes

Now magnesium alloy is the light metal materials of structural in engineering application, it has a wide potential of application and development in transport, communication equipment, aerospace and other fields. AZ31B magnesium alloy pipes is used to be the research object, and the extruded forming simulation for pipe was made by using finite element software ANSYS, under displacement loads. In order to make the pipe extrusion, the maximum stress of pipe must be bigger than the yield point of it, no matter the pipe was in strengthening phase or local deformation phase. According to the yield point and ultimate strength on the true stress-strain curve of pipe and yield criterion, it can be judged whether the pipe has plastic deformation or not, and it can be determined whether the load applied could make pipe achieve the purpose of extrusion or not.