摘要
建立了圆坯拔长锻造的运动许可速度场与应变速率场。采用双剪应力屈服准则经上界定理求得解析解,该解与传统工程法进行了比较,计算结果高于传统工程法的结果。
The kinematically admissible velocity field and strain rate field for extension forging of rounds have been established. Based on the twin-shearing stress yielding criterion. an analytical solution is obtained by upper bound theorem. Compared with that from the traditional slab method. the solution can give higher accuracy.
关键词
圆坯
拔长锻造
应力屈服准则
extension forging, continuous velocity field, twin-shearing stress criterion, upper-bound analytical solution.
