course in ansys - aalborg universitethomes.civil.aau.dk/shl/ansysc/ansys-example0240.pdf ·...
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Course in ANSYS
Example0240
Computational Mechanics, AAU, EsbjergANSYS
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Example0240 2Computational Mechanics, AAU, EsbjergANSYS
Example – Plate with a hole
E = 210000N/mm2
n = 0.3a = 200mmb = 100mmt = 10mmr = 10mms = 100N/mm2
Objective:Determine the maximum stress in the x-direction for point A and display the deformation figureTasks:How should this be modelled?Compare results with results obtained from norm calculations?Topics:Element type, Real constants, modeling, plot results, output graphics
A
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Example - titleUtility Menu > File > Change Jobname/jobname, Example0240 Command line entry
GUI
Enter: Example0240
Utility Menu > File > Change Title/title, Plate with a hole
Enter: Plate with a hole
Example0240 3Computational Mechanics, AAU, EsbjergANSYS
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Example – Areas RectanglePreprocessor > Modeling > Create > Areas > Rectangle > By DimensionsCreate an area given by X=(0,100) and Y=(0,50)
Enter 0 orleave empty
Example0240 4Computational Mechanics, AAU, EsbjergANSYS
Enter 100
Enter 50Enter 0 orleave emptyPress OK
Note: Keypoints (4 kp’s) and lines(4 lines) are automatically generated(also numbered automatically)
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Example – Areas Rectangle
Example0240 5Computational Mechanics, AAU, EsbjergANSYS
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Example – Areas CirclePreprocessor > Modeling > Create > Areas > Circle > Solid CircleCreate an area given by (X,Y)=(0, 0) and Radius=10
Example0240 6Computational Mechanics, AAU, EsbjergANSYS
Enter 10
Press OKNote: Keypoints (4 kp’s) and lines(4 lines) are automatically generated(also numbered automatically)
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Example - Area
Example0240 7Computational Mechanics, AAU, EsbjergANSYS
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Example0240 8Computational Mechanics, AAU, EsbjergANSYS
Example - OperatePreprocessor > Modeling > Operate > Booleans > Subtract > AreasCreate the final area by subtracting the circular area from the rectangular area
Note: Bottom left corner of ANSYS GUI
Press OK
Select the rectangular area and press OK
Note: Bottom left corner of ANSYS GUI
Select the circular area
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Example – Areas
Example0240 9Computational Mechanics, AAU, EsbjergANSYS
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Example – Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Add
Example0240 10Computational Mechanics, AAU, EsbjergANSYS
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Example - Element TypePreprocessor > Element Type > Add/Edit/Delete
Select Plane strs w/thk
Press Options
Example0240 11Computational Mechanics, AAU, EsbjergANSYS
Press Help to learn more about theelement.
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Example – Real ConstantsPreprocessor > Real Constants > Add
Place the cursoron the relevantelement andpress OK
Example0240 12Computational Mechanics, AAU, EsbjergANSYS
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Example - Real ConstantsPreprocessor > Real Constants > Add
Press OK
Press Closeto finish
10
Enter 10
Example0240 13Computational Mechanics, AAU, EsbjergANSYS
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Example - Material PropertiesPreprocessor > Material Props > Material Models
Double Clickto step in thematerial tree
Example0240 14Computational Mechanics, AAU, EsbjergANSYS
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Example - Material PropertiesPreprocessor > Material Props > Material Models
Enter:Modulus of elasticity
Enter:Poisson’s ratio
Click hereto Close
Press OK
Example0240 15Computational Mechanics, AAU, EsbjergANSYS
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Example – Free MeshingPreprocessor > Meshing > Mesh > Areas > Free
Example0240 16Computational Mechanics, AAU, EsbjergANSYS
Select individual areasto be meshed
Select all areas definedto be meshed
NB: It is often necessary to “Clear” the model forexample if Element Type or model geometry is to be changed
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Example – Free Mesh
Example0240 17Computational Mechanics, AAU, EsbjergANSYS
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Example – Analysis Type
Solution > Analysis Type > New Analysis
File > Write DB log fileEnter “example0240.lgw”
Example0240 18Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Lines
Select UY to fix the beam in the y-direction
Select the bottom straight line
Press OK
Example0240 19Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Lines
Select UX to fix the beam in the x-direction
Select the left straight line
Press OK
Example0240 20Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Pressure > On lines
Select the right straight line
Enter -100
Press OK to finish
Example0240 21Computational Mechanics, AAU, EsbjergANSYS
Note: Pressure acts normal and inward to a surface
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Example - Save
Display of Analysis model
Save the model
Example0240 22Computational Mechanics, AAU, EsbjergANSYS
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Example - SolveSolution > Solve > Current LS
Example0240 23Computational Mechanics, AAU, EsbjergANSYS
Press OK
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Example - SolvePress Close
Press hereto Close
Example0240 24Computational Mechanics, AAU, EsbjergANSYS
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Example - PostProcessingGeneral Postproc > Plot Results > Deformed Shape
Select “Def+undeformed”and Press OK
Example0240 25Computational Mechanics, AAU, EsbjergANSYS
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Example - PostProcessing
Read Maximum displacement: DMX
Example0240 26Computational Mechanics, AAU, EsbjergANSYS
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Example – Contour PlotGeneral Postproc > Plot Results > Contour Plot > Nodal Sol
Select Stress
Select SX for stresses in x-direction
Example0240 27Computational Mechanics, AAU, EsbjergANSYS
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Example – Contour Plot
Example0240 28Computational Mechanics, AAU, EsbjergANSYS
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Example – Comments/Questions
• Change the element size and rerun?• The “example0240.lgw” can be edited in
“Notepad”• What are the assumptions in this case?• Will the shape or the number of elements
affect the solution?
Example0240 29Computational Mechanics, AAU, EsbjergANSYS
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File menu
Example0240 30Computational Mechanics, AAU, EsbjergANSYS
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.