ANSYS 有限元分析 平面薄板
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《有限元基础教程》作业二:平面薄板的有限元分析
班级:机自101202班 姓名:韩晓峰 学号:201012030210
一.问题描述:
P P h
1mm R1mm
10m m 10mm
条件:上图所示为一个承受拉伸的正方形板,长度和宽度均为10mm ,厚度为h 为1mm ,中心圆的半径R 为1mm 。已知材料属性为弹性模量E=1MPa ,泊松比为0.3,拉伸的均布载荷q =
1N/mm 2。根据平板结构的对称性,只需分析其中的二分之一即可,简化模型如上右图所示。
二.求解过程:
1 进入ANSYS
程序 →ANSYS 10.0→ANSYS Product Launcher →File management →input job name: ZY2→Run
2设置计算类型
ANSYS Main Menu: Preferences →select Structural → OK
3选择单元类型
ANSYS Main Menu: Preprocessor →Element Type →Add/Edit/Delete →Add →select Solid Quad 4node 42 →OK → Options… →select K3: Plane Strs w/thk →OK →Close 4定义材料参数
ANSYS Main Menu: Preprocessor →Material Props →Material Models →Structural →Linear →Elastic →Isotropic →input EX: 1e6, PRXY:0.3 → OK
5定义实常数以及确定平面问题的厚度
ANSYS Main Menu: Preprocessor →Real Constants …→Add/Edit/Delete →Add →Type 1→OK →Real Constant Set No.1,THK:1→OK →Close
6生成几何模型
a 生成平面方板
ANSYS Main Menu: Preprocessor →Modeling →Create →Areas →Rectangle →By 2 Corners →WP X:0,WP Y:0,Width:5,Height:5→OK
b 生成圆孔平面
ANSYS Main Menu: Preprocessor →Modeling →Create →Areas →Circle →Solid Circle →WPX=0,WPY=0,RADIUS=1→OK
b 生成带孔板
ANSYS Main Menu: Preprocessor →Modeling →Operate →Booleans → Subtract →Areas →点击area1→OK →点击area2→OK
7 网格划分
ANSYS Main Menu: Preprocessor →Meshing →Mesh Tool →(Size Controls) Global: Set →SIZE: 0.5 →OK →iMesh →Pick All → Close
8 模型施加约束
a 分别给左边施加x和y方向的约束
ANSYS Main Menu: Solution →Define Loads →Apply →Structural →Displacement →On lines →拾取左侧边→OK →select UX,UY→OK
b 给斜边施加x方向均布载荷
Main Menu: Solution →Define Loads →Apply →Structural →Pressure →On Lines →拾取右侧边;OK →V ALUE:-10→OK
9 分析计算
ANSYS Main Menu: Solution →Solve →Current LS →OK→Close
10 结果显示
ANSYS Main Menu: General Postproc →Plot Results →Deformed Shape…→select Def + Undeformed →OK→Contour Plot →Nodal Solu…→select: DOF solution, Displacement vector sum, Def + Undeformed , Stress ,von Mises stress, Def + Undeformed→OK
11显示整体效果
Utility Menu→PlotCtrls→Style>Symmetry Expansion>Periodic/Cyclic Symmetry Expansion →1/4Dihedral Sym→OK
10 退出系统
ANSYS Utility Menu: File→Exit…→Save Everything→OK
三.结果分析:
图1 建模、网格划分、加载图图2 变形图
图3 整体应力