Upload
trannhu
View
237
Download
0
Embed Size (px)
Citation preview
1
Course in ANSYS
Example0300
Example0300 2
Example – Cantilever beam
E = 210000N/mm2
n = 0.3L = 100mma = 10mmb = 10mmF = 100N
Objective:Compute the maximum deflection and locatepoint of maximum deflection Tasks:How should this be modelled?Compare results with results obtainedfrom beam theory?Topics:Element type, Real constants, modeling,Plot results, output graphics
2
Example0300 3
Example - title
Utility Menu > File > Change Title/title, Cantilever beam
Utility Menu > File > Change Jobname/jobname, Example0300
Enter: Cantilever beam
Command line entryGUI
Enter: Example0300
Example0300 4
Example - AreasPreprocessor > Modeling > Create > Areas > Rectangle > By DimensionsCreate an area given by X=(0,100) and Y=(0,10)
Enter 0 orleave empty
Enter 100
Enter 10Enter 0 orleave empty
Note: Keypoints (4 kp’s) and lines(4 lines) are automatically generated(also numbered automatically)
Press OK
3
Example0300 5
Example - Area
Example0300 6
Example - OperatePreprocessor > Modeling > Operate > Extrude > Areas > Along NormalCreate a volume by extruding the area 10 along its surface normal vector
Note: Bottom left corner of ANSYS GUI
Press OK Enter 10
4
Example0300 7
Example – Mouse rotate
Rotate by holding the Ctrl key down while using the right hand mouse button
Example0300 8
Example – Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Add
5
Example0300 9
Example - Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Options
Press Help to learn more about theelement.
Example0300 10
Example – Real ConstantsNo Real Constants are necessary for pure 3D solid models!
6
Example0300 11
Example - Material PropertiesPreprocessor > Material Props > Material Models
Double Clickto step in thematerial tree
Example0300 12
Example - Material PropertiesPreprocessor > Material Props > Material Models
Enter:Modulus of elasticity
Enter:Poisson’s ratio
Click hereto Close
Press OK
7
Example0300 13
Example - MeshingPreprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Select/PickLines tospecifymesh sizefor
Press OK when finish with selection
Select the indicated lines
Example0300 14
Example - MeshingPreprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Press OK when finish with selectionEnter 2
8
Example0300 15
Example - MeshingPreprocessor > Meshing > Mesh > Volumes > Mapped > 4 or 6 sided
Select individual volumes to be meshed
Select all volumes defined to be meshed
NB: It is often necessary to “Clear” the model forexample if Element Type or model geometry is to be changed
Example0300 16
Example – 3D Mesh
9
Example0300 17
Example – Analysis Type
Solution > Analysis Type > New Analysis
File > Write DB log fileEnter “example0300.lgw”
Example0300 18
Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Areas
Select Area A6 or the left end area
Press OK
Select All DOF to fix/clamp the beam
10
Example0300 19
Example – Define LoadsSolution > Define Loads > Apply > Structural > Force/Moment > On Nodes
Select indicated element node
Press OK
Note: If the model is remeshed all loads will be deleted with the element nodes
Example0300 20
Example – Define LoadsSolution > Define Loads > Apply > Structural > Force/Moment > On Nodes
Change to FY
Enter -100Press OK to finish
11
Example0300 21
Example - Save
Display of Analysis model
Save the model
Example0300 22
Example - SolveSolution > Solve > Current LS
Press OK
12
Example0300 23
Example - SolvePress Close
Press hereto Close
Example0300 24
Example - PostProcessingGeneral Postproc > Plot Results > Deformed Shape
Select “Def+undeformed”and Press OK
13
Example0300 25
Example - PostProcessing
Read Maximum displacement: DMX
Example0300 26
Example – Comments/Questions
• What did change compared to the Beam model?
• The “example0300.lgw” can be edited in “Notepad”
• What are the assumptions in this case?• Will the shape or the number of elements
affect the solution?
14
Example0300 27
File menu
Clears (zeros out) the database stored in memory. Clearing the database has the same effect as leaving and reentering the ANSYS program, but does not require you to exit.
You can include commands to be executed when the program starts up in the start71.ans file.