【作者】 黄亮；

【导师】 张文志； 许秀梅；

【作者基本信息】 燕山大学 ， 机械设计及理论， 2004， 硕士

【摘要】 本文利用大型有限元软件 MARC 模拟了不锈钢复合板的热轧过程,并讨论了不锈钢复合板轧制过程最佳相对压下量问题。 利用数值模拟对轧制过程的仿真是目前轧制领域内研究的重要课题。数值模拟中的有限元法随着计算机的发展推出的计算软件 MARC 能够实现求解大型接触问题和多重非线性问题。不锈钢复合板的模拟较为复杂,划分的单元较多,又存在着材料的高度非线性。双金属轧制过程中金属塑性变形行为复杂,变形区内双金属接触界面附近的应力-应变的变化也很复杂。本文在对复合板轧制过程中的粘合特性进行分析的基础上,采用了适当的轧制和界面假设条件,建立了包括上辊、双层金属在内的三维模型,采取适当的加载和约束条件,对不锈钢复合板的热轧做了成功的模拟,最后得出了不同相对压下量条件下,轧制变形区内应力应变的分布情况以及轧制力的三维分布。在此基础上分析出不锈钢复合板在保证粘合基础上的最小相对压下量,这与实际生产工艺条件也是一致的。 轧制过程的有限元模拟已开展多年,但在三维有限元模拟下对变形区域内的应力-应变分布的研究很少,尤其是双金属复合板热轧复合过程的有限元模拟尚未见报道。因此,本文利用有限元软件 MARC 对不锈钢复合板的轧制复合过程模拟并获得了热轧复合的最小相对压下量条件,具有一定的创新性。更多还原

【Abstract】 The manufacture craft of stainless clad strip which is belong to bimetal composite plate is carried out in this paper, and the hot-rolled process of stainless clad strip is simulated using the large finite-element software MARC. The numerical simulation of the rolling process is studying emphasis in the lab of rolling field. The finite-element code MARC that is emerging with development of computer industry can be suitable for solving the large contact and highly non-linear question. Because of the complex model of stainless clad strip, great lots of plotted elements and the non-linear material, there are many very complexity questions of plasticity fluent in the hot-rolled process, and stress-strain near the interface of stainless clad strip is also very complexity varieties. With suitable conditional hypotheses and interface condition of stainless clad strip, the three-dimensional finite-element model including roller and rolled plates are established in simulation. Using suitable loading and edge-restraint conditions, the distribution of equivalent stress and equivalent can be obtained in the rolling deformation field, and the distribution of rolling force of stainless clad strip is also obtained, so reduction of stainless clad strip is established in rolling pass. These simulation results are in agreement with the experimental results during stainless clad strip produce in the rolled workshop. It has been developed many years using FEM methods to simulate rolling process. But the three-dimentional simulation of stainless clad strip is still infrequence. Therefore, the study by use of finite-element software MARC to simulate hot-rolled process of stainless clad in this article is bring forth certain new ideas.更多还原