摘要铝元素作为地壳中含量最多的金属元素，就可以表明金属铝的应用。纯铝因为具有良好的延展性、导电性、耐腐蚀性等性能，被广泛的应用在各个领域。为了改善纯铝的性能，提高它的强度，使其能适应更高的应用条件，人们对纯铝进行塑性加工，而纯铝板材的轧制就成了最为常见的加工方式之一。轧制加工具有很多优点，比如轧制造成的污染小、轧制效率高、轧制的成本低廉等。但是，如果轧制工艺不当也会对板材造成很多缺陷。而且，如果总是采用单一的轧制方式，那么板材的组织性能形成明显的各向异性，影响使用性能。86687

本文运用DEFORM有限元软件，对纯铝板材全纵向轧制和纵横交叉轧制进行数值模拟。分析两种轧制方式对轧件应力应变和变形缺陷的影响。研究发现纵横交叉轧制过后轧件的厚度方向应变量比全纵向轧制大，而且纵横交叉轧制的损伤情况也比全纵向轧制好的多。

毕业论文关键词：纯铝板材；有限元；轧制；数值模拟

Abstract Aluminum is the most abundant element in the earth's crust, which can indicate the application of aluminum。Pure aluminum is widely used in various fields because of its good ductility, conductivity, corrosion resistance and so on。In order to improve the performance of pure aluminum and improve its strength, so that it can adapt to the higher application conditions。 People plastic processing of pure aluminum and pure aluminum sheet rolling has become one of the most common processing methods。The rolling process has many advantages, such as low pollution, high efficiency, low cost and so on。However, if the rolling process is not appropriate, it will cause a lot of defects。Moreover, if we always use a single rolling then the microstructure and properties of the plate form obvious anisotropic which affects the performance of the application。

In this paper, the DEFORM finite element software is used to simulate the full longitudinal rolling and cross rolling of the pure aluminum sheet。Analysis of the influence of two kinds of rolling method on rolling stress strain and deformation defects。The study found that after the cross rolling thickness direction strain is larger than the full longitudinal rolling and the damage of cross rolling is better than that of transverse rolling。

Keywords:Pure  aluminum  sheet; finite  element; rolling; numerical  simulation

目录

第一章绪论 1

1。1 概述 1

1。2 纯铝的特点与应用 2

  1。2。1 纯铝介绍 2

  1。2。2 铝板材的应用 2

1。3 数值模拟在金属塑性加工中的应用 3

1。4 国内外研究现状及存在的问题 4

1。5 选题的目的和意义 7

1。6 本文的主要设计内容 7

第二章 DEFORM软件与建模过程 9

2。1 DEFORM有限元分析软件 9

  2。1。1 概述 9

  2。1。2 DEFORM系统结构 9

  2。1。3 DEFORM的功能 10

2。2 纯铝板轧制过程有限元模型的建立 10

  2。2。1 引言 10

  2。2。2 本构模型的输入 11

  2。2。3 有限元模型建立