Finite Element Analysis
Nodes
Elements
Discretization of a Domain
Linear Spring
Assembly of Global System of Eqns.
Assembly of Global System of Eqns.
Assembly of Global System of Eqns.
Assembly of Global System of Eqns.
Assembly of Global System of Eqns.
Solution of the Global System of Eqns.
Solution Modes
Boundary Conds. And Solution
Solution
Analysis of a Truss
Structure with Symmetry
Week 3
Reference: The Finite Element Method and Applications in Engineering Using
ANSYS, Erdogan Madenci and Ibrahim Guven, Springer, Second Edition (2015)
Problem Description
Elastic Modulus = 30 x 106
Poisson’s Ratio = 0.3
A1=A2=A4=A5=10 in2
A3=20 in2
1 ft = 12 in
Symmetry – Modelling Only One Half of The
Structure
Elastic Modulus = 30 x 106
Poisson’s Ratio = 0.3
A1=A2=A3=10 in2
PREPROCESSOR
Add Element from ANSYS Library
Define Material Properties
Define Cross-sectional Area
Main Menu > Preprocessor > Sections > Link
- Click on Add
- Enter Link Section ID as 1
- Enter Link area as 10
- Click on OK
Create Nodes
Create Elements
SOLUTION
Select Analysis Type
Main Menu > Solution > Analysis Type
- Select Static
- Click on OK
Constrain Node 1 in y-direction
Main Menu > Solution > Define Loads > Apply > Structural >
Displacement > On Nodes
- Pick Menu appears; pick node 1; click on OK in the Pick Menu
- Highlight UY; click on OK.
Apply Symmetry Conditions
Main Menu > Solution > Define Loads > Apply > Structural >
Displacement > On Nodes
- Pick Menu appears; pick node 2 and 3; click on OK in the Pick Menu
- Click on UY to remove the highlight and then click on UX to
highlight; click on OK.
Constrain UZ Displacements To Make The Model 2D
Main Menu > Solution > Define Loads > Apply > Structural >
Displacement > On Nodes
- Pick Menu appears; pick node 1, 2 and 3; click on OK in the Pick
Menu
- Click on UX to remove the highlight and then click on UZ to
highlight
- Click on OK.
Apply Force
Start Solution Process
POSTPROCESSOR
Visualize Deformed Configuration
Main Menu > General Postproc > Plot Results
- Click on Deformed Shape
- Select Def + undeformed
- Click on OK