[1] Avitzur, B.,Processes and Analysis, Metal Forming,McCiraw-Hill., Inc. (1968), 478-480.
[2] Hoffman, O., and G.Sachs,Introduction to the Theory of Plasticity for Engineers,McGraw-Hill Book Company,Inc.(1953), 249.
[3] Avitzur, B., The application of limit analysis, Metal Forming, Marcel Dekker,1nc.(1980), 7.
[4] Zhao Zhi-ye and Wang Guo-dong, Advanced Plastic Mechanics of Metal Froming,Publishing House of Northeast University of Technology (1986), 57. (in Chinese) |