铝带坯连续铸轧变形的有限元分析

.作者:李晓谦 黄晓林
.来源期刊:中南大学学报(自然科学版)1998年第4期
.中文关键字:有限元;铝带坯;连续铸轧
.英文关键字:finite element; aluminum strip; continuous roll casting
.中文摘要: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.
.英文摘要: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.
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