SURFACE INTEGRAL OF THREE-DIMENSIONAL VELOCITY FIELD FOR SQUARE BAR DRAWING THROUGH CONICAL DIE

来源期刊：中国有色金属学报(英文版)1996年第3期

论文作者：Zhao Dewen Guo Changwu Liu Xianghua

文章页码：131 - 135

Key words：square bar drawing;　three dimensional velocity field;　surface integral

Abstract: The kinematically admissible three-dimensional continuous velocity field of square bar drawing through a conical die was established. Its divergence has been proved to be zero. Then, the integral as a function of the upper limit and surface integral were used respectively in deformation and friction powers, and an upper bound analytical solution of the square bar drawing stress was obtained by the upper-bound theorem.