ansys-example0702

September 15, 2017 | Author: Tran Hoc | Category: Databases, Computer File, Areas Of Computer Science, Technology, Computing
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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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4

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

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

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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

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49

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

53

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

Syllabus

54

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

57

Example - Plot Menu

Plot Keypoint, Lines, and Areas

AutoDesk Inventor Computational Mechanics, AAU, Esbjerg

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58

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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60

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

63

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

Syllabus

66

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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67

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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70

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

Syllabus

72

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

73

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

Syllabus

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

Syllabus

95

Example – Contour Plot

AutoDesk Inventor Computational Mechanics, AAU, Esbjerg

Syllabus

96

Example – Select - Entities

See next page for selection

AutoDesk Inventor Computational Mechanics, AAU, Esbjerg

Syllabus

97

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

Syllabus

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Example – List Results

AutoDesk Inventor Computational Mechanics, AAU, Esbjerg

Syllabus

100

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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101

Example – Select - Entities

Select Pick All

AutoDesk Inventor Computational Mechanics, AAU, Esbjerg

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102

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

Syllabus

105

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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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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