【摘要】 采用Ｌéｖｙ－Ｍｉｓｅｓ塑性流动理论确立连续铸轧坯塑性变形的本构方程，根据铸坯材料的实际可压缩性，对Ｌéｖｙ－Ｍｉｓｅｓ屈服函数进行了修正．用有限单元法建立了变形体的势能泛函，并采用Ｓｕｍｔ－Ｐｏｗｅｌ罚函数优化方法计算势能泛函的极小值，建立了一种在变温条件下求解塑性变形体位移速度场的数值方法，并由此计算出变形体的应力应变分布及轧制力．实例计算结果与实测值较吻合．更多还原

【Abstract】 The Lévy Mises plastic flow theory was used to establish the physical equation of aluminum strip in roll casting. The Lévy Mises yield function was modified in consideration of the compressibility of the material. The potential energy function was constructed in finite element model. Its minimal was found by using the method of Sumt Powell penal functional optimization. Thereby the distributions of stress、strain and rolling force of the deformed body was computed. The results were in good agreement with the measured values.更多还原