ansys-example0702
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Description
Course in ANSYS Example0702
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Example – Plate with a hole A
Objective: Determine the maximum stress in the x-direction for point A and display the deformation figure Tasks: Create a submodel to increase the accuracy of the FEA without increasing the computational effort significantly? Topics: Element type, Real constants, modeling, mapped mesh, plot results, output graphics, path operations, submodeling AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
E = 210000N/mm2 n = 0.3 a = 200mm b = 100mm t = 10mm r = 10mm s = 100N/mm2
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Steps in Submodeling • The process for using submodeling is as follows: – Create and analyze the coarse model. – Create the submodel. – Perform cut boundary interpolation (CBI). – Analyze the submodel. – Verify that the distance between the cut boundaries and the stress concentration is adequate. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - title Utility Menu > File > Change Jobname /jobname, Example0702_coarse
GUI Command line entry Enter: Example0702_coarse
Utility Menu > File > Change Title /title, Plate with a hole
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Enter: Plate with a hole
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Example – Areas Rectangle Preprocessor > Modeling > Create > Areas > Rectangle > By Dimensions Create an area given by X=(0,100) and Y=(0,50) Enter 0 or leave empty Enter 100
Press OK
Enter 0 or leave empty
Enter 50
Note: Keypoints (4 kp’s) and lines (4 lines) are automatically generated (also numbered automatically) AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Areas Rectangle
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Areas Circle Preprocessor > Modeling > Create > Areas > Circle > Solid Circle Create an area given by (X,Y)=(0, 0) and Radius=10
Enter 10 Press OK Note: Keypoints (4 kp’s) and lines (4 lines) are automatically generated (also numbered automatically) AutoDesk Inventor Syllabus Computational Mechanics, AAU, Esbjerg
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Example - Area
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Operate Preprocessor > Modeling > Operate > Booleans > Subtract > Areas Create the final area by subtracting the circular area from the rectangular area Note: Bottom left corner of ANSYS GUI
Select the rectangular area and press OK Note: Bottom left corner of ANSYS GUI
Select the circular area
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Numbering
Switch on Keypoint, Line, and Area Numbers AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - List Menu
List Keypoint, Lines, and Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot Menu
Plot Keypoint, Lines, and Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Element Type Preprocessor > Element Type > Add/Edit/Delete
Press Add
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Element Type Preprocessor > Element Type > Add/Edit/Delete Select Plane strs w/thk
Press Options Press Help to learn more about the element. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Real Constants Preprocessor > Real Constants > Add
Place the cursor on the relevant element and press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Real Constants Preprocessor > Real Constants > Add
Enter 10
Press Close to finish Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Material Properties Preprocessor > Material Props > Material Models
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Double Click to step in the material tree
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Example - Material Properties Preprocessor > Material Props > Material Models Enter 210000 Modulus of elasticity
Click here to Close
Enter 0.3 Poisson’s ratio
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Meshing Preprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Select/Pick Lines to specify mesh size for
See next page
Pick the two longest lines Press OK when finish with selection AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Mesh Size 3 Element subdivisions
6 Element subdivisions
5 Element subdivisions
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Concatenate Lines
Select L2 and L3 to create a topologically four sided geometry
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Meshing Preprocessor > Meshing > Mesh > Areas > Mapped > 3 or 4 sided Select individual areas to be meshed NB: It is often necessary to “Clear” the model for example if Element Type or model geometry is to be changed
Select all areas defined to be meshed AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Mapped Mesh
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Analysis Type File > Write DB log file Enter “example0702_coarse.lgw”
Solution > Analysis Type > New Analysis
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Loads Solution > Define Loads > Apply > Structural > Displacement > On Lines Select UY to fix the plate in the y-direction Select the bottom straight line
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Loads Solution > Define Loads > Apply > Structural > Displacement > On Lines Select UX to fix the plate in the x-direction Select the left straight line
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Loads Solution > Define Loads > Apply > Structural > Pressure > On lines
Select the right straight line Enter -100
Press OK to finish Note: Pressure acts normal and AutoDesk inward toInventor a surface Computational Mechanics, AAU, Esbjerg
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Example - Save Display of Analysis model
Save the model
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Solve Solution > Solve > Current LS
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Solve Press Close Press here to Close
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Contour Plot General Postproc > Plot Results > Contour Plot > Nodal Sol Select Stress Select SX for stresses in x-direction
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Contour Plot
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select - Entities
See next page for selection
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select Nodes
Select the indicated nodes
AutoDesk Enter InventorOK when finished Computational Mechanics, AAU, Esbjerg
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Example – List Results
Select Stress, SCOMP Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – List Results
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
Plot Nodes
Only 11 FE nodes are displayed – the same nodes as selected previously
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select - Entities
Select Pick All
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
Plot Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Path
See next page for selection
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Path - By Nodes
Select the indicated nodes Note: the selection order is important – start from the hole AutoDesk Enter InventorOK when finished Computational Mechanics, AAU, Esbjerg
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Example – Define Path - By Nodes
Enter an appropiate name, e.g. SSX
Enter OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Map onto Path
Select Stress, SX Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Plot Path on Graph
Select SX
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Plot Path on Graph
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Steps in Submodeling • The process for using submodeling is as follows: – Create and analyze the coarse model. – Create the submodel. – Perform cut boundary interpolation (CBI). – Analyze the submodel. – Verify that the distance between the cut boundaries and the stress concentration is adequate. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - title Utility Menu > File > Change Jobname /jobname, Example0702_fine
GUI Command line entry Enter: Example0702_fine
Utility Menu > File > Change Title /title, Plate with a hole
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Enter: Plate with a hole
Syllabus
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Example – Areas Rectangle Preprocessor > Modeling > Create > Areas > Rectangle > By Dimensions Create an area given by X=(0,25) and Y=(0,25) Enter 0 or leave empty Enter 25
Press OK
Enter 0 or leave empty
Enter 25
Note: Keypoints (4 kp’s) and lines (4 lines) are automatically generated (also numbered automatically) AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
50
Example – Areas Rectangle
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
51
Example – Areas Circle Preprocessor > Modeling > Create > Areas > Circle > Solid Circle Create an area given by (X,Y)=(0, 0) and Radius=10
Enter 10 Press OK Note: Keypoints (4 kp’s) and lines (4 lines) are automatically generated (also numbered automatically) AutoDesk Inventor Syllabus Computational Mechanics, AAU, Esbjerg
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Example - Area
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
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Example - Operate Preprocessor > Modeling > Operate > Booleans > Subtract > Areas Create the final area by subtracting the circular area from the rectangular area Note: Bottom left corner of ANSYS GUI
Select the rectangular area and press OK Note: Bottom left corner of ANSYS GUI
Select the circular area
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Numbering
Switch on Keypoint, Line, and Area Numbers AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - List Menu
List Keypoint, Lines, and Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
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Example - Plot Menu
Plot Keypoint, Lines, and Areas
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Element Type Preprocessor > Element Type > Add/Edit/Delete
Press Add
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Element Type Preprocessor > Element Type > Add/Edit/Delete Select Plane strs w/thk
Press Options Press Help to learn more about the element. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Real Constants Preprocessor > Real Constants > Add
Place the cursor on the relevant element and press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Real Constants Preprocessor > Real Constants > Add
Enter 10
Press Close to finish Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Material Properties Preprocessor > Material Props > Material Models
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
Double Click to step in the material tree
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Example - Material Properties Preprocessor > Material Props > Material Models Enter 210000 Modulus of elasticity
Click here to Close
Enter 0.3 Poisson’s ratio
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
64
Example - Meshing Preprocessor > Meshing > Size Cntrls > ManualSize > Lines > Picked Lines
Select/Pick Lines to specify mesh size for
See next page
Pick the two longest lines Press OK when finish with selection AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
65
Example – Mesh Size 6 Element subdivisions
12 Element subdivisions
10 Element subdivisions
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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66
Example – Concatenate Lines
Select L2 and L3 to create a topologically four sided geometry
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
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Example - Meshing Preprocessor > Meshing > Mesh > Areas > Mapped > 3 or 4 sided Select individual areas to be meshed NB: It is often necessary to “Clear” the model for example if Element Type or model geometry is to be changed
Select all areas defined to be meshed AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Mapped Mesh
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Loads Solution > Define Loads > Apply > Structural > Displacement > On Lines Select UY to fix the plate in the y-direction Select the bottom straight line
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Loads Solution > Define Loads > Apply > Structural > Displacement > On Lines Select UX to fix the plate in the x-direction Select the left straight line
Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Submodel
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Steps in Submodeling • The process for using submodeling is as follows: – Create and analyze the coarse model. – Create the submodel. – Perform Cut Boundary Interpolation (CBI). – Analyze the submodel. – Verify that the distance between the cut boundaries and the stress concentration is adequate. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Syllabus
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Example – CBI Steps •
The following tasks are involved in performing the cut boundary interpolation: 1. Identify and write the cut-boundary nodes 2. Restore the full set of nodes, write the database to Jobname.DB 3. To do the cut boundary interpolation restore the coarse model 4. Enter POST1 5. Point to the coarse results file 6. Read in the desired set of data from the results file 7. Initiate cut-boundary interpolation 8. All interpolation work is now done
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
Plot Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
See next page for selection
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
Plot Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 1
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Enter example0702_cutboundary
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Example - CBI Steps •
The following tasks are involved in performing the cut boundary interpolation: 1. Identify and write the cut-boundary nodes 2. Restore the full set of nodes, write the database to Jobname.DB 3. To do the cut boundary interpolation restore the coarse model 4. Enter POST1 5. Point to the coarse results file 6. Read in the desired set of data from the results file 7. Initiate cut-boundary interpolation 8. All interpolation work is now done
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 2
Select Pick All
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - CBI Steps •
The following tasks are involved in performing the cut boundary interpolation: 1. Identify and write the cut-boundary nodes 2. Restore the full set of nodes, write the database to Jobname.DB 3. To do the cut boundary interpolation restore the coarse model 4. Enter POST1 5. Point to the coarse results file 6. Read in the desired set of data from the results file 7. Initiate cut-boundary interpolation 8. All interpolation work is now done
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 3 Enter example0702_coarse.db
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 3
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - CBI Steps •
The following tasks are involved in performing the cut boundary interpolation: 1. Identify and write the cut-boundary nodes 2. Restore the full set of nodes, write the database to Jobname.DB 3. To do the cut boundary interpolation restore the coarse model 4. Enter POST1 5. Point to the coarse results file 6. Read in the desired set of data from the results file 7. Initiate cut-boundary interpolation 8. All interpolation work is now done
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 4-6
Select All items Browse to find the result file see next page
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 4-6 Read the First Set
Enter example0702_coarse.rst AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - CBI Steps •
The following tasks are involved in performing the cut boundary interpolation: 1. Identify and write the cut-boundary nodes 2. Restore the full set of nodes, write the database to Jobname.DB 3. To do the cut boundary interpolation restore the coarse model 4. Enter POST1 5. Point to the coarse results file 6. Read in the desired set of data from the results file 7. Initiate cut-boundary interpolation 8. All interpolation work is now done
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 7
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
Browse to find example0702_cutboundary
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Example – CBI: Step 7
Enter example0702_fine.db
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Press OK
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Example – CBI: Step 7
Load the example0702_fine.cbdo Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – CBI: Step 8
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Solve Press Close Press here to Close
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Contour Plot General Postproc > Plot Results > Contour Plot > Nodal Sol Select Stress Select SX for stresses in x-direction
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Contour Plot
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select - Entities
See next page for selection
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select Nodes
Select the indicated nodes
AutoDesk Enter InventorOK when finished Computational Mechanics, AAU, Esbjerg
Syllabus
98
Example – List Results
Select Stress, SCOMP Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – List Results
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
Plot Nodes
Only 21 FE nodes are displayed – the same nodes as selected previously
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Select - Entities
Select Pick All
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
Plot Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example - Plot - Nodes
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Path
See next page for selection
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Define Path - By Nodes
Select the indicated nodes Note: the selection order is important – start from the hole AutoDesk Enter InventorOK when finished Computational Mechanics, AAU, Esbjerg
Syllabus
106
Example – Define Path - By Nodes
Enter an appropiate name, e.g. SSX
Enter OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Map onto Path
Select Stress, SX Press OK AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Plot Path on Graph
Select SX
Press OK
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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Example – Plot Path on Graph
AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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File menu You can include commands to be executed when the program starts up in the start71.ans file.
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. AutoDesk Inventor Computational Mechanics, AAU, Esbjerg
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