应力—应变关系的演变
(中南大学 机电工程学院，长沙 410083)
摘 要: 在Gleeble-1500热/力机上用专制的夹具系统对铝合金铸轧过程流变行为及其影响因素进行了系列的模拟实验研究，得到了不同变形条件下铝合金瞬态凝固连续固态流变成形过程中的形变规律。实验表明铝合金的［液-糊状-固］流变过程存在4个不同特征阶段，通过对实验数据进行多元线性回归分析，建立了适用于连续铸轧这一特定工况条件下铝合金流变本构方程。
关键字: 连续铸轧；流变行为；物理模拟；本构方程
continuous roll-casting process
（ School of Mechanical and Electronical Engineering,
Central South University, Changsha 410083, China）
Abstract: A series of simulating experimental studies on the rheological behavior and its influential factors of aluminum alloy in continuous roll-casting process were explored with a Gleeble-1500 thermal-mechanical simulation tester and a set of special clamp system. Relevant rheological rules in the process of coupling transient solidification and continuous deformation of roll-casting conditions are obtained. Experimental results indicate that four different characteristic stages exist in the whole rheological process, and relative constitutive models suitable for the given conditions of continuous roll casting process are established through multivariable linear regression analysis of the experimental data.
Key words: continuous roll-casting; rheological behavior; physical simulation; constitutive equation
