Course in ANSYS - Aalborg Universitethomes.civil.aau.dk/shl/ansysc/ansys-example0241.pdf · ANSYS...
Transcript of Course in ANSYS - Aalborg Universitethomes.civil.aau.dk/shl/ansysc/ansys-example0241.pdf · ANSYS...
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Course in ANSYS
Example0241
Computational Mechanics, AAU, EsbjergANSYS
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Example0241 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, mapped mesh, plot results, output graphics, path operations
A
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Example - titleUtility Menu > File > Change Jobname/jobname, Example0241 Command line entry
GUI
Enter: Example0241
Utility Menu > File > Change Title/title, Plate with a hole
Enter: Plate with a hole
Example0241 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
Example0241 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
Example0241 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
Example0241 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
Example0241 7Computational Mechanics, AAU, EsbjergANSYS
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Example0241 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
Example0241 9Computational Mechanics, AAU, EsbjergANSYS
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Example - Numbering
Example0241 10Computational Mechanics, AAU, EsbjergANSYS
Switch on Keypoint, Line, and Area Numbers
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Example - List Menu
List Keypoint, Lines, and Areas
Example0241 11Computational Mechanics, AAU, EsbjergANSYS
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Example - Plot Menu
Plot Keypoint, Lines, and Areas
Example0241 12Computational Mechanics, AAU, EsbjergANSYS
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Example – Element TypePreprocessor > Element Type > Add/Edit/Delete
Press Add
Example0241 13Computational Mechanics, AAU, EsbjergANSYS
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Example - Element TypePreprocessor > Element Type > Add/Edit/Delete
Example0241 14Computational Mechanics, AAU, EsbjergANSYS
Press Options
Press Help to learn more about theelement.
Select Plane strs w/thk
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Example – Real ConstantsPreprocessor > Real Constants > Add
Place the cursoron the relevantelement andpress OK
Example0241 15Computational Mechanics, AAU, EsbjergANSYS
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Example - Real ConstantsPreprocessor > Real Constants > Add
Press OK
Press Closeto finish
10
Enter 10
Example0241 16Computational Mechanics, AAU, EsbjergANSYS
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Example - Material PropertiesPreprocessor > Material Props > Material Models
Double Clickto step in thematerial tree
Example0241 17Computational Mechanics, AAU, EsbjergANSYS
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Example - Material Properties
Example0241 18Computational Mechanics, AAU, EsbjergANSYS
Preprocessor > Material Props > Material ModelsEnter 210000Modulus of elasticity
Enter 0.3Poisson’s ratio
Click hereto Close
Press OK
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Example - MeshingPreprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Example0241 19Computational Mechanics, AAU, EsbjergANSYS
Select/PickLines tospecifymesh sizefor
Pick the twolongest lines
Press OK when finish with selection
See next page
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Example – Mesh Size
3 Element subdivisions
5 Element subdivisions
6 Element subdivisions
Example0241 20Computational Mechanics, AAU, EsbjergANSYS
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Example – Concatenate Lines
Example0241 21Computational Mechanics, AAU, EsbjergANSYS
Select L2 and L3 to create a topologically foursidedgeometryPress OK
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Example - MeshingPreprocessor > Meshing > Mesh > Areas > Mapped > 3 or 4 sided
Example0241 22Computational 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 – Mapped Mesh
Example0241 23Computational Mechanics, AAU, EsbjergANSYS
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Example – Analysis Type
Solution > Analysis Type > New Analysis
File > Write DB log fileEnter “example0241.lgw”
Example0241 24Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Lines
Select UY to fix the plate in the y-direction
Select the bottom straight line
Press OK
Example0241 25Computational Mechanics, AAU, EsbjergANSYS
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Example – Define LoadsSolution > Define Loads > Apply > Structural > Displacement > On Lines
Select UX to fix the plate in the x-direction
Select the left straight line
Press OK
Example0241 26Computational 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
Example0241 27Computational 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
Example0241 28Computational Mechanics, AAU, EsbjergANSYS
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Example - SolveSolution > Solve > Current LS
Example0241 29Computational Mechanics, AAU, EsbjergANSYS
Press OK
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Example - SolvePress Close
Press hereto Close
Example0241 30Computational Mechanics, AAU, EsbjergANSYS
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Example - PostProcessingGeneral Postproc > Plot Results > Deformed Shape
Select “Def+undeformed”and Press OK
Example0241 31Computational Mechanics, AAU, EsbjergANSYS
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Example - PostProcessing
Read Maximum displacement: DMX
Example0241 32Computational 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
Example0241 33Computational Mechanics, AAU, EsbjergANSYS
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Example – Contour Plot
Example0241 34Computational Mechanics, AAU, EsbjergANSYS
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Example – Select - Entities
See next page for selection
Example0241 35Computational Mechanics, AAU, EsbjergANSYS
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Example – Select Nodes
Select the indicated nodes
Note: the selection order is important –start from the hole
Example0241 36Computational Mechanics, AAU, EsbjergANSYS Enter OK when finished
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Example – List Results
Example0241 37Computational Mechanics, AAU, EsbjergANSYS
Select Stress, SCOMP
Press OK
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Example – List Results
Example0241 38Computational Mechanics, AAU, EsbjergANSYS
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Example - Plot - Nodes
Plot Nodes
Only 6 FE nodes are displayed – the same nodes as selected previously
Example0241 39Computational Mechanics, AAU, EsbjergANSYS
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Example – Select - Entities
Select Pick All
Example0241 40Computational Mechanics, AAU, EsbjergANSYS
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Example - Plot - Nodes
Plot Nodes
Example0241 41Computational Mechanics, AAU, EsbjergANSYS
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Example - Plot - Nodes
Example0241 42Computational Mechanics, AAU, EsbjergANSYS
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Example0241 43Computational Mechanics, AAU, EsbjergANSYS
Example – Define Path
See next page for selection
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Example – Define Path - By Nodes
Select the indicated nodes
Note: the selection order is important –start from the hole
Example0241 44Computational Mechanics, AAU, EsbjergANSYS Enter OK when finished
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Example – Define Path - By Nodes
Enter an appropiate name, e.g. SX
Enter OK
Example0241 45Computational Mechanics, AAU, EsbjergANSYS
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Example0241 46Computational Mechanics, AAU, EsbjergANSYS
Example – Map onto Path
Select Stress, SX
Press OK
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Example0241 47Computational Mechanics, AAU, EsbjergANSYS
Example – Plot Path on Graph
Select SX
Press OK
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Example – Plot Path on Graph
Example0241 48Computational Mechanics, AAU, EsbjergANSYS
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Example – Comments/Questions
• Change the element type to a second order element type and rerun?
• The “example0241.lgw” can be edited in “Notepad”
• Will the shape or the number of elements affect the solution?
• Determine the shear stress in the lines of symmetry?
Example0241 49Computational Mechanics, AAU, EsbjergANSYS
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Example0241 50Computational 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.