1. K. Imar, Effects of tool deformation and product’s elastic recovery on the dimensional accurance of backward extrusion cups, Plast. Work. 23 (252) (1982) 1 (in Chinese).
2. T. Kato, et al., Prediction of dimensional accuracy of cold extruded can during repeating operation, Ann. CIRP 35 (1) (1986) 177–180.
3. J. Danckert, Modelmaterialeteknik, Ph.D. Report, MM No. 77.23, Department of Manufacture Engineering, DTU (in Danish).
4. P.H. Hansen, N. Bay, P. Christensen, Analysis of the ring test using a general friction model and the upper bound element technique, in: Proceedings of the 16th NAMRC Symposium, May 1988, pp. 41–47.
5. A model for friction in metal forming processes;Wanheim;Ann. CIRP,1978