摘要
分析了显式动力学弹塑性有限元方法的计算过程 ,并用其对平板轧制问题进行了模拟计算·模拟时轧辊采用刚性材料模型 ,轧件采用双线性强化材料模型 ,轧件具有一定的初始速度并向辊缝运动 ,咬入后靠摩擦完成轧制过程·通过模拟计算 ,得出咬入、稳定轧制和抛钢阶段整个轧制过程的应力 应变场·将板宽对称中心线轧制压力分布的计算结果与实验值进行对比 ,表明计算结果准确·另外通过对计算结果进行分析还可以得出 ,在稳定轧制阶段存在弹性预变形区、塑性变形区和弹性恢复区 ;轧制压力沿接触面的分布在入口和出口的变化梯度较大 ,中间区域的变化梯度较小·
Based on the theory of dynamic explicit elastic plastic FEM, the strip rolling process was simulated and analyzed. In the simulation, the roll was modeled by the rigid material and the strip by the bilinear isotropic hardening material. The rolling was carried out by the contact friction after the strip had moved towards to the roll gap with an initial velocity and bitten into the gap. The stress and strain distribution of the whole rolling process was obtained, including during the bite stage, the steady stage and the exit stage. Out of the calculation results, the rolling pressures on the width symmetry center were compared with the experiment values. They are in good agreement. The calculation results also showed that there are a pre elastic deformation zone, a plastic deformation zone and an elastic recovery zone in the contact surface at the steady stage. The rolling pressure distribution along the contact surface varies much steeper at the entry and exit zones than at the middle zone.
出处
《东北大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2001年第3期327-330,共4页
Journal of Northeastern University(Natural Science)
基金
教育部高等学校博士学科点专项科研基金!资助项目 ( 970 14 5 15 )
关键词
平板轧制
弹塑性有限元
显式动力学
数值模拟
轧制压力
strip rolling
elastic plastic finite element
dynamic explicit
simulation
rolling pressure
