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| New Formulas of Shear Strain during Equal-channel Angular Pressing Process with Consideration of Influences of Velocity and Motion Trajectory |
| Dian-tao ZHANG1,2,Zhen LI1,2,Yun-xiang TONG1,2,Yu-feng ZHENG2,3,Li LI1,2 |
1. Key Laboratory of Superlight Material and Surface Technology Ministry of Education, Harbin Engineering University, Harbin 150001, Heilongjiang, China
2. Center for Biomedical Materials and Engineering, Harbin Engineering University, Harbin 150001, Heilongjiang, China
3. Department of Materials Science and Engineering, College of Engineering, Peking University, Beijing 100871, China |
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Abstract The influences of die parameters on shear strain were investigated by using two-dimensional finite element simulation. New formulas of shear strain were proposed. According to the results of formulas, the shear strain showed a linear dependence 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 motion trajectory 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.
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Received: 11 March 2016
Published: 18 October 2016
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| Fund:the Fundamental Research Funds for the Central Universities |
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2016, Vol. 23 
