## 有限元弯管稳定性的模拟分析+文献综述

Simulation Analysis of Elbow Stability Abstract
Steel Pipe Structures (SPS) have been widely used in civil engineering. In comparison to the straight pipes are extensively employed in steel trusses and lattice shells, the curved steel pipes as the chord of trusses or skeleton of membrane structures being increasedly used. The cold-bending process of steel pipes possesses high productive efficiency and low energy and less production cost, it can be widely used in the structure field. However, the mechanical properties of cold-bended steel pipes are changed greatly. Generally, this change is not valuable to the member and related structures. If neglecting this variations, the steel pipes exists potential uncertainty. Even it makes the structure fail.This project mainly uses the finite element method on the simulation analysis of tube bending forming process. This paper study Q235, 304 of two kinds of steel tubes, with different specifications, bending radius under different conditions, deformation, bending and forming process of the stress and strain variation, and comparative analysis of two kinds of steel of the similarities and differences, Ultimately determine the critical point defects in steel pipe, the minimum bending radius.

Keywords：elbow; finite element simulation; bending radius; invalidation

1 文献综述    1
1.1 管材弯曲加工一般介绍    1
1.2 国内外研究现状    1
2 选题目的及意义    2
2.1 目的    2
2.2 意义    2
3 研究方案    3
3.1 研究方案    3
3.2 两种材质    3
3.2.1 Q235碳素结构钢    3
3.2.2 304奥氏体不锈钢    4
3.3 参数设置    4
4 DEFORM软件    5
4.1 前处理器    5
4.2 模拟处理器    5
4.3 后处理器    6
4.4 DEFORM软件操作流程    6
5 弯管的有限元建模    8
5.1 几何模型的建立    8
5.2 网格的建立    9
5.3 材料模型的建立    10
5.4 边界条件的处理    11
5.4.1 接触的建立    11
5.4.2 摩擦模型的选择    11
5.3.3 设置对象间关系    11
5.5 定义驱动条件    12
5.6 设置轧件体积补偿    13
5.7 设置模拟控制信息    13
5.8 生产数据库文件及分析求解    14
5.9 后处理    15
5.9.1 变形过程显示    15
5.9.2 查看状态变量    15
6 有限元模拟云图分析    16 源￥自%六:维;论-文'网=www.lwfree.cn
6.1 弯曲半径对弯管的影响    16 有限元弯管稳定性的模拟分析+文献综述:http://www.lwfree.cn/cailiao/20170509/6690.html
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