CATIA V5 Analysis
Lesson 4: Post-processing
Student Notes:
In this lesson, you will learn how to generate different images for result visualization in GPS workbench.
Lesson content:
Copyright DASSAULT SYSTEMES
Case Study: Drill Press Table Model Post-processing Design Intent Stages in the Process Post-processing Visualization Images Sensors Report Generation
Duration: Approximately 0.25 days
Copyright DASSAULT SYSTEMES
1
CATIA V5 Analysis
Case Study: Drill Press Table Post-processing
Student Notes:
The case study for this lesson is the Drill Press Table Post-processing. The focus of this case study is to create required visualization images. Introduction to FEA
•Exercises
GPS preprocessing
•Exercises
Copyright DASSAULT SYSTEMES
(Case Study)
GPS Computation
GPS Postprocessing
•Exercises
•Exercises
•Exercises
Assembly Structural Analysis
•Exercises
Master Project
Drill Press Table FE Model
Copyright DASSAULT SYSTEMES
Mesh Refinement
Drill Press Table Translational Displacement Image
2
CATIA V5 Analysis Student Notes:
Design Intent
Copyright DASSAULT SYSTEMES
You must decide which results are required to be viewed. Based on this decision you will create the visualization images and an analysis report which will clearly summarize the results of the computation. For this case study we will: Find the location of maximum value of translational displacement. Find the location of maximum values of Principal stress distributions. Find the location of maximum value of Von Mises stress in FE model. Find the location of maximum value of local error distribution. Create output sensors for Energy and Global Error Rate percentage. Create Resultant sensor to see the reactions at restraints. Create Analysis Report with Images.
Copyright DASSAULT SYSTEMES
Drill Press Table Displacement Image
3
CATIA V5 Analysis Student Notes:
Stages in the Process This will involve the following steps to perform the case study. First, you will learn what is meant by Post-processing. Later, you will see how to use the various result visualization functionalities in the GPS workbench. Understand Post-processing. Create Visualization Images. Create Extrema on created images. Use sensors. Generate analysis report.
Copyright DASSAULT SYSTEMES
1. 2. 3. 4. 5.
Copyright DASSAULT SYSTEMES
Drill press Table Von Mises Stress Image
4
CATIA V5 Analysis
Step 1: What is Post-processing
Student Notes:
You will learn the Post-processing functionalities for result visualization in GPS workbench. What is Post-processing
2. 3. 4.
Visualization Images Sensors Report Generation
Copyright DASSAULT SYSTEMES
1.
Copyright DASSAULT SYSTEMES
5
CATIA V5 Analysis Student Notes:
Post-processing Post-processing involves all those steps which are carried out after computation of results. In this step you will : 1.
2.
Copyright DASSAULT SYSTEMES
3.
Create Deformation, Displacement Magnitude, Stress, Reaction force and other available images from computed solution data.
Pre-processing (FE Modeling)
Computation (Solving FE Model)
Find location of the result values in FE model. Validate the results using different images and study these Images to understand and interpret the solution.
4.
Make decisions for further improving the solution with mesh refinement iterations or other Solution Types.
5.
Validate the current design or provide the design changes based on the results.
Copyright DASSAULT SYSTEMES
Post-processing (View Results)
Mesh Refinement Iterations
Create Reports Finite Element Analysis Process
6
CATIA V5 Analysis Student Notes:
Step 2: Visualization Images You will learn how to create images for different result values in GPS workbench.
1. What is Post-processing
2. Visualization Images
Copyright DASSAULT SYSTEMES
3. Sensors 4. Report Generation
Copyright DASSAULT SYSTEMES
7
CATIA V5 Analysis Student Notes:
Generating Images (1/2) 2
Before you generate an image, make sure that the View mode is set to Custom View Modes. This needs to be set only for the first time:
Set Custom View Mode. 1.
In View mode toolbar, click Customize View Parameters icon. Set the options as shown in the dialog box.
3.
Click OK.
Copyright DASSAULT SYSTEMES
2.
Copyright DASSAULT SYSTEMES
1
3
8
CATIA V5 Analysis Student Notes:
Generating Images (2/2) CATIA provides following types of result visualization images: Image
Icon
Purpose of Image Visualize the finite element mesh in the deformed configuration under the applied loading condition.
Displacement
Visualize the displacement field patterns, which represent variation of position vectors of material particles as a result of applied load.
Principal Stresses
Visualize the principal stress field patterns, which represent a tensor field quantity used to measure the state of stress and to determine the load path on a loaded part.
Von Mises Stresses
Visualize the Von Mises Stress field patterns, which represent a scalar field quantity obtained from the volume distortion energy density and used to measure the state of stress. The volume distortion energy density is often used in conjunction with the material yield stress value to check part structural integrity according to the Von Mises criterion. For a sound structural design, the maximum value of the Von Mises stress should be less than this yield value.
Precision
Visualize the computation error maps, which represent scalar field quantities defined as the distribution of energy error norm estimates for a given computation.
Copyright DASSAULT SYSTEMES
Deformation
Copyright DASSAULT SYSTEMES
9
CATIA V5 Analysis Student Notes:
Generating Deformation Image (1/2) You will see how to visualize FE model deformation under an applied load: Create Deformation Image. 1.
2.
In the Image toolbar, click the Deformation icon. The deformed mesh will be created and the Deformed Mesh.1 image will be displayed in 1 the specification tree under Static Case Solution.1. Double-click Deformed Mesh.1 image in the specification tree to open Image Edition dialogue box.
Copyright DASSAULT SYSTEMES
Part model in Custom View Mode
Copyright DASSAULT SYSTEMES
Default deformation image 2
10
CATIA V5 Analysis Student Notes:
Generating Deformation Image (2/2) You can change the display of the deformation image: 3. 4. 5.
Check Display nodes of elements option. Slide the Shrink Coefficient button to 0.85. Click OK.
3
3
4 4
Copyright DASSAULT SYSTEMES
5
The displacement is scaled for better visualization. You can modify the default value of the scaling factor by using the Amplification Magnitude functionality .
Copyright DASSAULT SYSTEMES
Elements with 0.85 shrink coefficient
11
CATIA V5 Analysis Student Notes:
Generating Displacement Image (1/3) You will see how to visualize the FE model Displacement image: Create Displacement Image. 1.
2.
In the Image toolbar, click the Displacement icon. Translational displacement vector.1 image will be displayed in the specification tree under Static Case Solution.1. Double-click the Translational displacement vector.1 image in the specification tree to open the Image Edition dialogue box.
1
Copyright DASSAULT SYSTEMES
Default Displacement image
Copyright DASSAULT SYSTEMES
2
12
CATIA V5 Analysis Student Notes:
Generating Displacement Image (2/3) You can change the display of the displacement image: 3. 4. 5.
In Types field, select Average iso. In Criteria field, select Vector component. Click More>> button.
3
3
4 4
Copyright DASSAULT SYSTEMES
5
You can visualize the displacement distribution on the component without nodes and elements, by unselecting the option Edges and points from the View Mode Customization.
Copyright DASSAULT SYSTEMES
13
CATIA V5 Analysis Student Notes:
Generating Displacement Image (3/3) 6.
Copyright DASSAULT SYSTEMES
7.
In Component field, select C2 from dropdown. In this way, you can visualize different vector components of displacement vector. Click OK.
Copyright DASSAULT SYSTEMES
6
7
C1: x component in the current axis system. C2: y component in the current axis system. C3: z component in the current axis system. You can also have a combination of these components such as ‘C1 & C2’ by selecting Type as ‘Symbol’
14
CATIA V5 Analysis Student Notes:
Generating Principal Stress Image (1/2) You will see how to visualize Principal Stress image. 1.
2.
In the Other Image toolbar, click the Principal Stress icon. The Stress principal tensor symbol.1 image will be displayed in the specification tree under Static Case Solution.1. Double-click the Stress principal tensor symbol.1 image in the specification tree to open the Image Edition dialogue box.
1
Copyright DASSAULT SYSTEMES
Default Principal Stress image
Copyright DASSAULT SYSTEMES
2
15
CATIA V5 Analysis
Generating Principal Stress Image (2/2)
Student Notes:
You can change the display of the Principal Stress image: 3. 4. 5.
In Types field, select Discontinuous iso. In Criteria field, select Principal value. Click OK.
3
Copyright DASSAULT SYSTEMES
4
5
Copyright DASSAULT SYSTEMES
Principal Stress image with ‘Discontinuous iso’ Type and ‘Principal value’ Criteria
16
CATIA V5 Analysis Student Notes:
Additional Information (1/3) When you edit an image, you can choose from a list of image types. The list of types depend on the selected image. Type Average iso Discontinuous iso Fringe Text
lets you visualize isolines at nodes. This visualization type uses the Material Rendering capabilities. lets you visualize isolines at nodes of an element. Visualizing isolines at nodes of elements may induce a color discontinuity from one element to another. lets you color an element, a face of element or an edge of element according to the scalar value defined for this entity. lets you visualize the results using text. lets you visualize the results using symbols The available symbols depend on the values to be displayed.
Copyright DASSAULT SYSTEMES
Symbol
Meaning
Copyright DASSAULT SYSTEMES
17
CATIA V5 Analysis Student Notes:
Additional Information (2/3) Position defines the Location for which result values are provided by solver. Position changes according to the selected type. You can choose the position for text and symbol types only. Position Node Node of Element Center of Element
Meaning Linked to the mesh nodes. For each node, there is only one value. For each node, there are as many values as elements linked to this node. For each element center, there is only one value.
Edge of Element
For each edge element, there is only one value.
Face of Element
For each face element, there is only one value.
Element
The position of the Gauss points depend on the type of element. For more details, refer to the Finite Element Reference Manual.
Copyright DASSAULT SYSTEMES
Gauss Point Element
For each element, there is only one value.
Copyright DASSAULT SYSTEMES
18
CATIA V5 Analysis Student Notes:
Additional Information (3/3) The position depends on the selected Type and Criteria option in the Visu tab.
Position Visu Type
Node
Edge of Element
Face of Element
Element
Gauss Point of Element
Center of Element
Node of Element
Average iso Discontinuous iso Fringe Symbol
Copyright DASSAULT SYSTEMES
Text
The Criteria option provides a list of visualization criteria. The list of visualization criteria depends on the physical type of the selected image and the selected Type. Modifying the criteria can change the value parameters and filter parameters.
Copyright DASSAULT SYSTEMES
19
CATIA V5 Analysis Student Notes:
Generating Von Mises Stress Image You will see how to visualize Von Mises Stress image. 1.
Copyright DASSAULT SYSTEMES
2.
In the Image toolbar, click Von Mises Stress icon. Von Mises Stress (nodal values).1 image will be displayed in the specification tree under Static Case Solution.1. Double-click Von Mises Stress (nodal values).1 image in the specification tree to open Image Edition dialogue box. You can change default Von Mises Stress image using various available options.
Copyright DASSAULT SYSTEMES
1
2
20
CATIA V5 Analysis Student Notes:
Generating Precision Image Estimated local error images are used to visualize computation error maps. This map provides the qualitative information about the relative distribution of the estimated computation errors. You will see how to visualize Local error distribution (Precision) image. 1.
Copyright DASSAULT SYSTEMES
2.
In Image toolbar, click Precision icon. Estimated local error.1 image will be displayed in the specification tree under Static Case Solution.1. Double-click Estimated local error.1 image in the specification tree to open Image Edition dialogue box. You can change default image using various available options.
Copyright DASSAULT SYSTEMES
1
2
21
CATIA V5 Analysis Student Notes:
Using ‘Cut Plane Analysis’ Tool Cut Plane Analysis consists in visualizing sections of the structure to allow you to visualize results within the material. You can move or rotate the section plane using the compass which is automatically positioned on the part, with the cutting plane normal to its privileged direction.
Copyright DASSAULT SYSTEMES
1.
Click on the Cut Plane Analysis icon. The cutting plane and the Dialog box appears.
2.
Select Show cutting plane to see the complete cutting plane. If you unselect this option, you will only see boundaries of the plane.
3.
Select Clipping and press Reverse direction button to reverse the direction of Clipping plane.
4.
To observe the results at required location, you can move or rotate the plane by using the compass.
5.
Click Close to close the dialog box.
Copyright DASSAULT SYSTEMES
2 1
3
5
compass 4
22
CATIA V5 Analysis Student Notes:
Step 3: Sensors You will learn how to use sensors in GPS workbench.
What is Post-processing Visualization Images
3.
Sensors
4.
Report Generation
Copyright DASSAULT SYSTEMES
1. 2.
Copyright DASSAULT SYSTEMES
23
CATIA V5 Analysis Student Notes:
Using Sensors (1/2) A sensor is a physical output of a computation. Sensors allow you to produce specialized output that is provided as a single value, rather than a range of values displayed on the model. You can use sensor output to: A.Validate the Analysis results Example: Energy, Error in Energy, Global Error Rate sensors B.Synthesize analysis results and thus use it as parameter to improve, optimize design specifications Example: Maximum Displacement, Maximum Von Mises, Mass sensors Global sensor provides an output value for the entire FE model. Sensor Type
Sensor Energy Error in Energy Global Error Rate (%)
Copyright DASSAULT SYSTEMES
Global
Use Provides Energy values in J. Provides Error in Energy values in J. Provides Global Error Rate in %.
Maximum Displacement
Provides Maximum Displacement Magnitude in mm.
Maximum Von Mises
Provides Maximum Von Mises Stress value in N/m2.
Copyright DASSAULT SYSTEMES
Mass
Provides mass in Kg.
24
CATIA V5 Analysis Student Notes:
Using Sensors (2/2) A Local sensor provides an output value for a local region in the FE model. The Reaction represents the resulting force and moment at restraint and connection specifications.
Sensor Type
Sensor Displacement Magnitude
Local
Use Provides Displacement Magnitude in mm.
Displacement Vector
Provides Displacement Vector in mm.
Von Mises Stresses
Provides Maximum Von Mises Stress value in N/m2.
Error Reaction
Provides Resultant Force components in N and Moment Components in Nm.
Copyright DASSAULT SYSTEMES
Resultant
Provides Energy values in J.
Copyright DASSAULT SYSTEMES
25
CATIA V5 Analysis Student Notes:
Displaying Sensor Values Before you create a sensor, and in order to display the sensor output value, check that you have set the following option. Follow these steps to Display Sensor Values. 1. 2. 3. 4. 5.
In Main menu, select Tools > Options. Click on Parameters and Measure in Options specification tree. Click on Knowledge Tab. In Parameter Tree View, check option With value. Click OK.
3 4
Copyright DASSAULT SYSTEMES
2
Copyright DASSAULT SYSTEMES
26
CATIA V5 Analysis Student Notes:
Creating Global Error Rate Sensor The Global Error Rate sensor is used as parameter to validate accuracy of solution and indicates overall accuracy of the solution. The Error in energy value should be in order of 10e-8. this will depend upon the judgment of Analyst.
1
The total error, e (estimated precision) is the sum of the all local errors. From this, the Global Error Rate is calculated according to following formula.
Where E is the strain energy. Follow these steps to create Global Error Rate sensor.
2
Right-click Sensors.1 node in the specification tree. Select Create Global Sensor. Select Global Error Rate (%) in Global Sensors field. Click OK. Expand Global Error Rate (%).1 node in the specification tree.
Copyright DASSAULT SYSTEMES
1. 2. 3. 4. 5.
Copyright DASSAULT SYSTEMES
3 5 4
27
CATIA V5 Analysis Student Notes:
Creating Reaction Sensor (1/2) A Reaction sensor reports the reaction force and moment at the constraint. You can use this information to verify that static equilibrium has been satisfied. Specifically, the Resultant reaction force at all support must be equal to the applied force. Follow these steps to create Reaction sensor. 1.
Copyright DASSAULT SYSTEMES
2. 3.
Right-click on Sensors.1 node in the specification tree. Click Create Resultant Sensor. Click Reaction Sensor.
Copyright DASSAULT SYSTEMES
1
2
3
28
CATIA V5 Analysis Student Notes:
Creating Reaction Sensor (2/2) Create Reaction sensor (continued). 4. 5. 6. 7.
Select Clamp.1 in Supports field. Click on the Update Results button to update Reaction Force components Check the value in Norm field is equal to the applied load. Click OK.
4
Copyright DASSAULT SYSTEMES
5
Copyright DASSAULT SYSTEMES
6
7 Resultant of Applied Load
Applied Load
29
CATIA V5 Analysis Student Notes:
Step 4: Report Generation You will learn how to generate report using post-processing data in GPS workbench.
What is Post-processing Visualization Images Sensors
4.
Report Generation
Copyright DASSAULT SYSTEMES
1. 2. 3.
Copyright DASSAULT SYSTEMES
30
CATIA V5 Analysis Student Notes:
Report Generation You can analyze the results with Result Management tools. These tools will help you to get more detailed information about the results, such as: A. B. C. D. E.
Maximum and minimum values for displacements, stresses and other result values Error in energy Global error rate Image Layouts Result Animations
To achieve required level of solution accuracy, several mesh refinement iterations may have been required. Once this has been attained you can generate reports.
Copyright DASSAULT SYSTEMES
In this step you will present the information generated during the following stages of the FE Analysis process: A. Pre-processing B.
Computation
C.
Results Visualization
Copyright DASSAULT SYSTEMES
Pre-processing (FE Modeling)
Computation (Solving FE Model)
Post-processing (View Results)
Mesh Refinement Iterations
Create Reports Finite Element Analysis Process
31
CATIA V5 Analysis Student Notes:
Generating Report (1/2) You will see how to create the final analysis report. Follow these steps to create the Analysis Report. 1. In the Analysis Results toolbar, click Generate Report icon. 2. Select required folder in Output directory field. 3. In Title field write the title for the report. 4. Check Add created images option. This will add all created result visualization images in report. 5. In Choose the analysis case(s), you can choose the analysis cases to be included in report. This is applicable in the event that you have multiple analysis cases. 6. Click OK.
1
2 3 4
Copyright DASSAULT SYSTEMES
5
Copyright DASSAULT SYSTEMES
6
32
CATIA V5 Analysis Student Notes:
Generating Report (2/2) Various report views are illustrated below:
Preprocessing Information
Computation Information
Copyright DASSAULT SYSTEMES
Result sensor Information
Result Images
Copyright DASSAULT SYSTEMES
33
CATIA V5 Analysis
To Sum Up
Student Notes:
Copyright DASSAULT SYSTEMES
In the following slides you will find a summary of the topics covered in this lesson.
Copyright DASSAULT SYSTEMES
34
CATIA V5 Analysis Student Notes:
What is Post-processing Post-processing involves all those steps which are carried out after computation of results. In this step you will: Create different images like Deformation, Displacement magnitude, Stress, Reaction force, and other available images from computed solution data. Find location of result values in FE model. Validate the results using different images and study these images to understand and interpret the solution. Make decisions for further improving the solution with mesh refinement iterations or other solution types. Validate the current design or provide the changes based on the results.
Image Deformation
Displacement
Copyright DASSAULT SYSTEMES
Visualization Images CATIA provides the different visualization images to study the results of the analysis as shown in the table. When you edit an image, you can choose the image type. Location of the result values, provided by the solver, changes according to the selected type. You can choose the location for text and symbol types only.
Copyright DASSAULT SYSTEMES
Principal Stresses
Von Mises Stresses
Precision
Purpose of the image To visualize finite element mesh in the deformed configuration To visualize displacement field patterns which represent variation of position vectors of material particles To visualize principal stress field patterns which represent a tensor field quantity used to measure the state of stress To visualize the Von Mises Stress field patterns, which represent a scalar field quantity obtained from the volume distortion energy density
To visualize computation error maps
35
CATIA V5 Analysis
Sensors
Student Notes:
Sensor is a physical output of a computation. Sensors allow you to produce specialized output provided as a single value rather than a range of values displayed on the model. You can use sensor output to: Validate the Analysis Results Synthesize the analysis results and use it as a parameter to improve and optimize design specifications. Global sensor provides an output value for the entire FE model, while local sensor provides an output value for a local region in the FE model.
Copyright DASSAULT SYSTEMES
Report Generation After the required level of solution accuracy is reached, after and several mesh refinement iterations, you can generate reports. In this step of report generation, you will present the information generated during all stages of the FE Analysis process: Pre-processing, Computation, and Post-processing.
Copyright DASSAULT SYSTEMES
36
CATIA V5 Analysis Student Notes:
Main Tools (1/2) View Mode 1
Customize View Parameters: lets you customize the view mode.
Image 2
3
4
Deformation: lets you specify the finite element mesh in the deformed configuration under applied loading condition. Displacement: lets you visualize the displacement field patterns, which represent variation of position vectors of material particles as a result of applied load.
2 4 3
Von Mises stress: lets you visualize the Von Mises Stress field pattern.
Other Image
Copyright DASSAULT SYSTEMES
1
5
Principle stress: lets you visualize the principle stress field patterns which represent a tensor field quantity used to measure the state of stress and to determine the load path on loaded part.
6
Precision: lets you visualize the computation error maps.
Copyright DASSAULT SYSTEMES
5 6
37
CATIA V5 Analysis Student Notes:
Main Tools (2/2) Analysis tools 7
Cut Plane Analysis: lets you to visualize sections of the structure to allow you to visualize the results within the material.
7
Analysis Results Generate Reports: lets you to generates report for computed solutions.
8
Copyright DASSAULT SYSTEMES
8
Copyright DASSAULT SYSTEMES
38
CATIA V5 Analysis
Exercise 4A
Student Notes:
Recap Exercise 15 min
In this exercise, you will create result visualization images for 1D component. Detailed instructions for this exercise are provided.
By the end of this exercise you will be able to: Create Deformation image Create Translational Displacement image
Copyright DASSAULT SYSTEMES
Create Principal Stress Image
Copyright DASSAULT SYSTEMES
39
CATIA V5 Analysis Student Notes:
Exercise 4A (1/4) 1.
Open a Analysis Document. Open 4A_Hollow_Shaft_1D_Start.CATAnalysis.
2.
Visualize and deactivate Deformation pattern. Create Deformation Image. a.
Copyright DASSAULT SYSTEMES
b.
In Image toolbar, click Deformation icon. The deformed mesh will be displayed. Right-click on the Deformed Mesh.1, select Activate/Deactivate option to deactivate the image.
Copyright DASSAULT SYSTEMES
2a
2b 40
CATIA V5 Analysis Student Notes:
Exercise 4A (2/4) 3.
Visualize Translational Displacement results. Create Translational Displacement Magnitude Image. a.
Copyright DASSAULT SYSTEMES
b.
In Image toolbar, click Displacement icon. Double-click Translational displacement vector.1 image in specification tree to open Image Edition dialogue box.
Copyright DASSAULT SYSTEMES
3a
3b
41
CATIA V5 Analysis Student Notes:
Exercise 4A (3/4) c. d. e.
In Types field, select Average iso. Click OK. Deactivate the image using Activate/Deactivate option in Translational displacement Magnitude.1 contextual menu.
3c
Copyright DASSAULT SYSTEMES
3d
Copyright DASSAULT SYSTEMES
42
CATIA V5 Analysis Student Notes:
Exercise 4A (4/4) 4.
Display Principal Stress Distribution Create Principal Stress Tensor Image. a. b.
c. d.
In Other Image toolbar, click Principal Stess icon. Double-click Stress principal tensor symbol.1 image in specification tree to open Image Edition dialogue box. In Types field, select Average iso. Click OK.
4a
Copyright DASSAULT SYSTEMES
4c
Copyright DASSAULT SYSTEMES
4d
43
CATIA V5 Analysis
Exercise 4A: Recap
Student Notes:
Create Deformation image. Create Translational Displacement image.
Copyright DASSAULT SYSTEMES
Create Principal Stress Image.
Copyright DASSAULT SYSTEMES
44
CATIA V5 Analysis
Exercise 4B
Student Notes:
Recap Exercise 15 min
In this exercise, you will create result visualization images for 2D component. Detailed instructions for new topics are provided for this exercise.
By the end of this exercise you will be able to: Create Translational Displacement image Create Principal Stress Image Create Von Mises Stress Image Create Precision Image Copyright DASSAULT SYSTEMES
Create Energy and Global error Rate sensor Animate the displacement Image
Copyright DASSAULT SYSTEMES
45
CATIA V5 Analysis
Exercise 4B (1/7) 1.
Open a Analysis Document. Open 4B_Hollow_Shaft_2D_Start.CATAnalysis.
2.
Visualize Translational Displacement results. Create Translational Displacement Vector Image. Select Type as average iso. Uncheck the Deform according to option and observe the difference in image.
Copyright DASSAULT SYSTEMES
a. b.
Student Notes:
Copyright DASSAULT SYSTEMES
46
CATIA V5 Analysis Student Notes:
Exercise 4B (2/7) 3.
Display Average Minimum Principal Stress Distribution. Create Principal Stress Tensor Image. a. b. c.
d. e.
Select Type as average iso for average values. Click More >> button. In Component field, select C22 for minimum principal stress. In Layer field, select Mid. Click OK.
3a
3c 3d
Copyright DASSAULT SYSTEMES
3e For Stress Principal Tensors Image: In the case of 3D elements: C11: is the maximum principal stress C22: is the middle principal stress C33: is the minimum principal stress You can also have a combination of these components (for example, C11 C22). In the case of 2D elements: C11: is the maximum principal stress C22: is the minimum principal stress
Copyright DASSAULT SYSTEMES
47
CATIA V5 Analysis Student Notes:
Exercise 4B (3/7) 4.
Display Von Mises using Principal Stress Distribution Image Modify Principal Stress Tensor Image. a.
b. c.
4b
4c 4e 4f
Copyright DASSAULT SYSTEMES
d. e. f.
Double-click the Stress principal tensor component (nodal values).1 image in specification tree. Change the type to Average iso in the Types field. Click on Von Mises in criteria field. Click More >> button. In Layer field, select Mid. Click OK.
Copyright DASSAULT SYSTEMES
48
CATIA V5 Analysis Student Notes:
Exercise 4B (4/7) 5.
Display Local Error Distribution Create Precision Image. In Other Image toolbar, click Precision icon.
5a
Copyright DASSAULT SYSTEMES
a.
Copyright DASSAULT SYSTEMES
49
CATIA V5 Analysis Student Notes:
Exercise 4B (5/7) 6.
Create Sensors. Create Energy sensor. a.
Expand Sensors.1 > Energy node in specification tree. You will get the energy value.
6a
The energy value calculated is the total strain energy of the model. If this node does not display the value then:
Copyright DASSAULT SYSTEMES
• •
• • •
In Main menu, select Tools > Options Click on Parameters and Measure in Options specification tree. Click on Knowledge Tab. In Parameter Tree View, check option With value. Click OK.
Copyright DASSAULT SYSTEMES
c d b
50
CATIA V5 Analysis Student Notes:
Exercise 4B (6/7) 6.
Create Sensors (continued) Create global Error Rate sensor. b. c. d. e.
In Sensors.1 contextual menu, click Create Global Sensor. Select Global Error Rate (%) in the Create Sensor dialogue box. Click OK. Expand the new node Global Error Rate (%).2 which get added in Sensors.1 node in specification tree. You will get Global Error Rate value.
6b
Copyright DASSAULT SYSTEMES
6c
Copyright DASSAULT SYSTEMES
6d
51
CATIA V5 Analysis Student Notes:
Exercise 4B (7/7) 7.
Visualize Animation. Animate the displacement image. a. b. c. d. e.
Deactivate Estimated local error.1 image. Activate the Translational displacement magnitude.1 image. In Analysis Tools toolbar, click Animate icon. In Steps number, select 20 from dropdown. Adjust the Speed button as shown.
Copyright DASSAULT SYSTEMES
7c
Copyright DASSAULT SYSTEMES
52
CATIA V5 Analysis
Exercise 4B: Recap
Student Notes:
Create Translational Displacement image. Create Principal Stress Image. Create Von Mises Stress Image. Create Precision Image. Create Energy and Global error Rate sensor
Copyright DASSAULT SYSTEMES
Animate the displacement Image
Copyright DASSAULT SYSTEMES
53
CATIA V5 Analysis
Exercise 4C
Student Notes:
Recap Exercise 15 min
In this exercise, you will create result visualization images for 3D component. Detailed instructions for new topics are provided for this exercise.
By the end of this exercise you will be able to: Create Translational Displacement image Create Von Mises Stress Image Create Precision Image Create Global error Rate sensor Copyright DASSAULT SYSTEMES
Use Cut Plane Analysis Find Image Extrema Display Image Information Generate Report
Copyright DASSAULT SYSTEMES
54
CATIA V5 Analysis Student Notes:
Exercise 4C (1/7) 1.
Open a Analysis Document. Open 4C_Hollow_Shaft_3D_Start.CATAnalysis.
2.
Visualize Translational Displacement results. Create Translational Displacement Vector Image. a.
3.
2a
Select Type as average iso.
Display Von Mises Stress Distribution. Create Von Mises stress Image. In Image toolbar, click Von Mises Stress icon.
3a
Copyright DASSAULT SYSTEMES
a.
Copyright DASSAULT SYSTEMES
55
CATIA V5 Analysis Student Notes:
Exercise 4C (2/7) 4.
Display Local Error Distribution. Create Precision Image. In Other Image toolbar, click Precision icon.
4a
Copyright DASSAULT SYSTEMES
a.
Copyright DASSAULT SYSTEMES
56
CATIA V5 Analysis Student Notes:
Exercise 4C (3/7) 5.
Create Sensors. Create Global Error Rate sensor. Create Maximum Displacement sensor. Create Maximum Von Mises sensor.
Copyright DASSAULT SYSTEMES
5b
Copyright DASSAULT SYSTEMES
57
CATIA V5 Analysis Student Notes:
Exercise 4C (4/7) 6.
Cut Plane Analysis. Use cut plane analysis to view inside details of FE model. a. b.
c. d.
6b
Activate the Von Mises stress image and deactivate other images. In Analysis Tools toolbar, click Cut Plane analysis icon. It will display a cut plane with compass. You can use compass to orient the cut plane. Use the options shown in Cut Plane Analysis dialogue box. Orient the cut plane perpendicular to length of hollow shaft using mouse and compass. You can view the Von Mises stress distribution along the cross section of hollow shaft.
Cut plane
Cross section of FE model at cut plane
Copyright DASSAULT SYSTEMES
6d
Copyright DASSAULT SYSTEMES
compass
58
CATIA V5 Analysis Student Notes:
Exercise 4C (5/7) 7.
Find Maximum Von Mises stress value and location. Find Image extrema for Von Mises stress. a. b. c. d. e.
Activate the Von Mises stress image and deactivate other images. In Analysis Tools toolbar, click Image Extrema icon. Check the Global option. In Maximum extrema at most field, enter 1. Click OK.
7b
7c 7d
Copyright DASSAULT SYSTEMES
7e
Image Extrema for Von Mises Stress showing maximum stress value and location in FE model Maximum Von Mises stress location
Copyright DASSAULT SYSTEMES
59
CATIA V5 Analysis Student Notes:
Exercise 4C (6/7) 8.
Display Image information. Find Image Information for Von Mises stress. a. b. c.
Activate the Von Mises stress image and deactivate other images. In Analysis Tools toolbar, click Information icon. Click the Von Mises Stress (nodal values).1 option. You will get Information dialogue box.
8b
Copyright DASSAULT SYSTEMES
8c
Copyright DASSAULT SYSTEMES
60
CATIA V5 Analysis Student Notes:
Exercise 4C (7/7) 9.
Create Analysis Report. Generate Report for Analysis Case. a. b. c. d. e.
f.
In Analysis Results toolbar, click Generate Report icon. Select the desired folder in the Output directory field. In Title field write the title for the report. Check Add created images option. This will add all created result visualization images in report. In Choose the analysis cases(s), you can choose the analysis cases to be included in report. This is applicable in case you have multiple analysis cases. Click OK.
9a
9b 9c
9d
Copyright DASSAULT SYSTEMES
9e
Copyright DASSAULT SYSTEMES
9f
61
CATIA V5 Analysis
Exercise 4C: Recap
Student Notes:
Create Translational Displacement image. Create Von Mises Stress Image. Create Precision Image. Create Global error Rate sensor. Use Cut Plane Analysis. Find Image Extrema. Display Image Information.
Copyright DASSAULT SYSTEMES
Generate Report.
Copyright DASSAULT SYSTEMES
62
CATIA V5 Analysis
Case Study: Drill Press Table Post-processing
Student Notes:
Recap Exercise 30 min
You will practice what you learned, by completing the case study model. In this exercise, you will post process FE model for Drill Press Table. Recall the design intent of this model: Create required Visualization Images. Create Extrema on created images. Create sensors.
Copyright DASSAULT SYSTEMES
Generate analysis report.
Copyright DASSAULT SYSTEMES
63
CATIA V5 Analysis Student Notes:
Case Study: Introduction
The case study for this lesson is the Drill Press Table FE model post-processing. The focus of this case study is to postprocess the computed data as per requirement. You will perform the following steps in order to achieve this.
Copyright DASSAULT SYSTEMES
1. 2. 3. 4.
Create required Visualization Images. Create Extrema on created images. Create sensors. Generate analysis report.
Drill press Table FE Model
Copyright DASSAULT SYSTEMES
Drill press Table Translational Displacement Image
64
CATIA V5 Analysis
Design Intent (1/2)
Student Notes:
You will create Translational Displacement Magnitude plot. You will find the magnitude of maximum average displacement. Also find the location of maximum value of translational displacement. Also observe the Z-direction component image for translational displacement. Create Translational Displacement Magnitude image and create Global Extrema for this image. Create Translational Displacement Component with Z-direction component image and create Global Extrema for this image. You will create plots for Maximum Principal stress and Minimum Principal stress distribution with discontinuous iso and find out the location of maximum values.
Copyright DASSAULT SYSTEMES
Create Principle Stress image with Maximum Principal Stress component and create Global Extrema for this image. Create Principal Stress image with Minimum Principal Stress component and create Global Extrema for this image.
Copyright DASSAULT SYSTEMES
65
CATIA V5 Analysis
Design Intent (2/2)
Student Notes:
You will create Von Mises stress distribution plot and its location of maximum value in FE model. Create Von Mises stress image and create Global Extrema for this image. You will create Local error distribution and its location of maximum value. Create Precision image and create Global Extrema for this image. You will create output sensors for Error in Energy, Global Error Rate percentage.
You will create Resultant sensor to know reactions at restraints.
Copyright DASSAULT SYSTEMES
Create Resultant sensor in reaction sensor.
You will create Analysis Report with Images.
Copyright DASSAULT SYSTEMES
66
CATIA V5 Analysis Student Notes:
Do It Yourself Open Drill_Press_Table_Post_Processing_Start. CATAnalysis.
2.
Create required Visualization Images.
3.
Create Extrema on created images.
4.
Create sensors.
5.
Generate analysis report.
Copyright DASSAULT SYSTEMES
1.
Copyright DASSAULT SYSTEMES
Drill press Table Von Mises Stress Image
67
CATIA V5 Analysis
Case Study: Drill Press Table Post-processing Recap
Student Notes:
Create required Visualization Images. Create Extrema on created images. Create sensors.
Copyright DASSAULT SYSTEMES
Generate analysis report.
Copyright DASSAULT SYSTEMES
68