Workshop 9-1 NAS101 Workshops Copyright 2001 MSC.Software Corporation WORKSHOP 9 Buckling...

Workshop 9-1NAS101 WorkshopsCopyright 2001 MSC.Software Corporation

WORKSHOP 9

Buckling Analysis of Plate


Workshop 9 (cont.)

1.Model descriptiona.The model dimension is 20 inch by 8 inchb.The following boundary conditions are applied to the model:

Pin at the left end Rollers at the right end Zero vertical deflections at top and bottom edges

c.Apply 100psi compressive loads at the right edge Total loads at right edge = (100) (8) (.01) = 8

• Apply 1 lb each at grid points 11 and 55• Apply 2 lbs each at grid points 22, 33, and 44


Workshop 9 -- Boundary Conditions

Simply supportedSimply supported

Supported on rollersSupported on rollersSupported in the Supported in the Vertical DirectionVertical Direction

Supported in the Supported in the Vertical DirectionVertical Direction


Workshop 9 -- Applied Loads

22

2222

11

11


Create the first surface

a. Create / Surface / XYZ.

b. Enter <20 8 0> for the Vector Coordinate List.

c. Use [0 0 0] as the Origin Coordinate List.

d. Click Apply.

Step 1. Create Geometry: Create/Surface/XYZ


Create mesh seeds that will be used to guide the mesh.

a. Create / Mesh Seed / Uniform.

b. Input 4 in the Number of Elements.

c. Select Surface 1.1 as the Curve List.

d. Click Apply.

e. Input 10 in the Number of Elements.

f. Select Surface 1.4 as the Curve List.

g. Click Apply.

Step 2. Finite Element: Create /Mesh Seed/Uniform

Surface 1.1

Surface 1.4


Step 2A. Finite Element: Create /Mesh/Surface

Create surface mesh based on the mesh seeds assigned in the previous steps.

a. Create / Mesh / Surface.b. Select Quad as the Elem

Shape.c. Select IsoMesh as the Mesher.d. Enter Surface 1 for Surface

List.e. Click Apply.


Step 3. Material: Create /Isotropic/ Manual Input

Create the material aluminum.a. Create / Isotropic / Manual

Input.b. Type in alum for the Material

Name.c. Click on the Input Properties

button to bring up the Input Option window.

d. Enter 2.9E7 for the Elastic Modulus , and 0.3 for Poisson Ratio

e. Click OK to return to the main material menu.

f. Click Apply.


Step 4. Element Properties: Create /2D/ Shell

Create the element properties.a. Create / 2D / Shell.b. Enter plate as the Property

Set Name.c. Click on the Input Properties

button.d. Click on the alum in the

Material field on the bottom section of the Input Properties window.

e. Enter 0.01 as the thickness for the plate.

f. Click OK.g. Select Surface 1 for the

Application Regionh. Click Add.i. Click Apply.


Step 5. Loads/BCs: Create/ Displacement/Nodal

Create the boundary condition for the model.

a. Create / Displacement / Nodal.

b. Enter simply_supported_left as the New Set Name.

c. Click on the Input Data.d. Enter <0 0 0> for the

Translation field.e. Click OK.f. Click on Select

Application Region.g. Select FEM as the

geometry filter..h. Select Node

1,12,23,34,45 for the Application Region.These are nodes along the left edge of the rectangle.

i. Click Add.j. Click OK.k. Click Apply.


Step 5A.(cont.) Loads/BCs: Create Boundary Conditions

After you have completed previous steps,then you see the constraints on the model as shown below:





b. Enter support_vertical_bottom as the New Set Name.

c. Click on the Input Data.d. Enter <, , 0> for the



geometry filter..h. Select Node 1 through

11 for the Application Region.These are nodes on the bottom






b. Enter support_vertical_top as the New Set Name.

c. Click on the Input Data.d. Enter <, , 0> for the



geometry filter..h. Select Node 45 through

55 for the Application Region.These are nodes on the top edge of the rectangle.






b. Enter supported_rollers_right as the New Set Name.

c. Click on the Input Data.d. Enter <, 0, 0> for the



geometry filter..h. Select Node

11,22,33,44,55 for the Application Region.These are nodes on the right edge of the rectangle.



Step 9. Loads/BCs: Create/Force /Nodal

Apply distributed load to the model.

a. Create / Force / Nodalb. Enter edge as the New

Set Name.c. Click on the Input Data

button.d. Enter <-1 0 0> in the Force

field.e. Click OK.f. Click on Select

Application Region button.

g. Select FEM as the Geometry Filter.

h. Select Node 11,55 for the Application Region.

i. Click Add, and OK.j. Click Apply.


Step 9A.(cont.) Loads/BCs: Loading on the right edge

After you have completed previous steps,then you see the load on the model as shown below:


Step 10. Loads/BCs: Create/Force /Nodal

Apply distributed load to the model.

a. Create / Force / Nodalb. Enter middle as the New

Set Name.c. Click on the Input Data

button.d. Enter <-2 0 0> in the Force

field.e. Click OK.f. Click on Select

Application Region button.

g. Select FEM as the Geometry Filter.

h. Select Node 22,33,44 for the Application Region.

i. Click Add, and OK.j. Click Apply.


Step 10A.(cont.) Loads/BCs: All the loadings plus constraints

After you have completed previous steps,then you see the loads and constraints on the model as shown below:


Step 11. Analysis: Analyze/ Entire Model/Full Run

Submit the model for analysis.a. Analyze / Entire Model / Full

Run.b. Click on the Solution Type.c. Select BUCKLING as the

Solution Type.d. Click OK.e. Click on the Solution

Parametersf. The menu called Solution

Parameters is shown on next page


Step 12. Analysis: Analyze/ Entire Model/Full Run

a. Uncheck the box label Large

Displacementsb. Click on Eigenvalue Extraction

button.c. Extraction Method is Lanczos

Put in number 5 for Number of Desired Roots.

d. Click OK.e. Click OKf. Click OKg. Click APPLY


Step 13. Analysis: Attach XDB/ Result Entities/ Local

Attach the XDB result file.a. Attach XDB / Result Entities /

Local.b. Click on Select Result File.c. Select the file called w9.xdbd. Click OK.e. Click Apply.


Step 14. Results: Create/Quick Plot

Create a Quick Plot of the results.a. Create / Quick Plot.b. Select SC2 result case.c. Select Eigenvectors, Translational for both the Fringe results and

for the Deformation d. Click APPLY.

Workshop 9-1 NAS101 Workshops Copyright 2001 MSC.Software Corporation WORKSHOP 9 Buckling...

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Transcript of Workshop 9-1 NAS101 Workshops Copyright 2001 MSC.Software Corporation WORKSHOP 9 Buckling...