Abstract: Equal cross section lateral extrusion (ECSLE) is an effective method realizing pure shear deformation. The S type ECSLE, which could realize severe plastic strain through repetitive deformation, has been adopted in producing ultra fine grained materials. The influence of friction on the deformation uniformity of S type ECSLE was investigated with rigid plastic finite element method. The FEM analysis was conducted with the combination of different friction factor and different lateral angle. The value of friction factor for analysis varies from 0.1 to 1.0 and the lateral angle varies from 10° to 90°. The result shows that, the higher the friction factor, the more the uneven plastic deformation resulted in extruded workpiece. A deformation uniformity factor was defined to measure the deformation uniformity of extruded workpiece. The relation curve of deformation uniformity factor vs. friction factor was drawn based on the analysis result and the curve can be used as a basis of S type ECSLE process design.
Finite element analysis of deformation uniformity of equal cross section lateral extrusion
Abstract:
Equal cross section lateral extrusion (ECSLE) is an effective method realizing pure shear deformation. The S type ECSLE, which could realize severe plastic strain through repetitive deformation, has been adopted in producing ultra fine grained materials. The influence of friction on the deformation uniformity of S type ECSLE was investigated with rigid plastic finite element method. The FEM analysis was conducted with the combination of different friction factor and different lateral angle. The value of friction factor for analysis varies from 0.1 to 1.0 and the lateral angle varies from 10° to 90°. The result shows that, the higher the friction factor, the more the uneven plastic deformation resulted in extruded workpiece. A deformation uniformity factor was defined to measure the deformation uniformity of extruded workpiece. The relation curve of deformation uniformity factor vs. friction factor was drawn based on the analysis result and the curve can be used as a basis of S type ECSLE process design.