Simple shear plastic deformation behavior of polycarbonate plate due to the equal channel angular extrusion process. I: Finite element methods modeling

Simple shear plastic deformation behavior of polycarbonate (PC) plates due to the novel equal channel angular extrusion (ECAE) process is modeled usin g a commercial finite element methods (FEM) package. The true stress and tr ue strain contour plots as well as the strain rate variation across the PC plate during the ECAE process are analyzed. The FEM results correlate well with the experimental findings. The present study indicates that the novel ECAE process is effective in producing a high degree of simple shear plasti c deformation across the extruded polycarbonate plate, The high degree of p lastic deformation due to ECAE induces a high level of nearly uniform molec ular orientation across the extruded PC plate. As a result, significantly i mproved physical and mechanical properties in PC are expected. The simple s hear plastic deformation behavior of PC plate, as a function of extrusion r ate and temperature, is investigated. The significance of the ECAE process for fabricating polymer parts is also discussed.