材料期刊网

The influences of die parameters on shear strain were investigated by using two-dimensional finite element simula-tion.New formulas of shear strain were proposed.According to the results of formulas,the shear strain showed a linear de-pendence on the difference between internal and external fillet radius and the slope was determined by the intersection angle. The simulation results indicated that the velocities of the points from different zones were different in the specimen and the motion trajectories of different points did not follow geometrical laws.The influences of the average velocity and the mo-tion traj ectory on shear strain were incorporated in the formula to calculate the shear strain produced during equal-channel angular pressing process.The reliability of simulation results has been partially validated by experiments.