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1、Generative Part Structural Analysis Scenario Scenario ObjectivesScenario Objectives Objectives ?To show Stress Analysis is easy to use - even for non-analyst ?To show CATIA gives accurate results ?To Show the CATIAs associativity features ? Page 2 Scenario Major StepsScenario Major Steps Here are th
2、e major steps of the scenario: Step 1 ?Show the supporting geometry Step 2 ?Prepare the part for analysis Step 3 ?Assign boundary conditions ( Loads and Restrains) Step 4 ?Solve the problem Step 5 ?Visualize the results Step 6 ?Analyze the results Step 7 ?Change the design and resolve Step 8 ?Reanal
3、yze the results Page 3 IBM Product Lifecycle Management Solutions / Dassault SystemesPage 4 Icons WB Setting the environmentSetting the environment Setting the environment ?For this exercise you will need to change some Options ?In the Menu bar, select Tools + Options ?Under General+Parameters, in t
4、he Options Pop-up window, select Units tab ?Select the Length line and with the scroll down menu, choose the Inch(in) unit ?On the Force line, select the Pound Force (lbf) unit ?Finally on the Pressure line select the Lb. force per square inch (psi) unit ?Click OK to confirm the settings IBM Product
5、 Lifecycle Management Solutions / Dassault SystemesPage 5 Icons WB Step 1: Show the Supporting GeometryStep 1: Show the Supporting Geometry Loading the Product ?Here you will open the assembly ?Go to File and Open the Drill_ Press.CATProduct file in the DataGenerative Part Structural Analysis direct
6、ory ?Check you are in the Assembly Design workbench ?If not, select the Product Name in the Specification tree, then select Start + Assembly Design ?Select Manipulation icon ?Select Y Translation in Manipulation Parameters window ?Check the With respect to constrains option box IBM Product Lifecycle
7、 Management Solutions / Dassault SystemesPage 6 Icons WB Step 1: Show the Supporting AssemblyStep 1: Show the Supporting Assembly ?In the 3D view, drag the “sliding jaw” part along the Y axis (as shown by the yellow arrow) and then drag it back to the original position. This shows the assembly mecha
8、nism is properly constrained ?Click OK to close the Manipulation window ?Click on the Update icon if needed ?You should not have to do this if you are in Automatic Update ?Expand the screw part in structure tree by clicking on the + symbol ?Click MB3 on Steel. Then select Properties to show the mate
9、rial properties ?Select Analysis folder to see the Structural Properties of the chosen material ?Click OK to close the Properties window IBM Product Lifecycle Management Solutions / Dassault SystemesPage 7 Icons WB Step 2: Prepare the part for AnalysisStep 2: Prepare the part for Analysis ?From this
10、 assembly you will open the part and analyze its deformations. In this CATIA demonstration mode you cannot Study the Stress Analysis on a full assembly because this product is not installed. If you are interested in an assembly evaluation, please contact your Business Partner ?In the Menu bar, selec
11、t Edit + Links to look at the different parts included in that assembly ?Select the Screw.1 line ?Click on the Open button ?The screw will be opened in a new window IBM Product Lifecycle Management Solutions / Dassault SystemesPage 8 Icons WB Step 2: Prepare the part for AnalysisStep 2: Prepare the
12、part for Analysis ?You will simplify the part by deactivating a redundant pattern at end of screw (which will not affect the analysis results). This operation will save computation time ?Click MB3 on CircPattern.1 in the Specification tree then select Selected objects + Deactivate ?Repeat the operat
13、ion for CircPattern.2 IBM Product Lifecycle Management Solutions / Dassault SystemesPage 9 Icons WB Step 2: Prepare the part for AnalysisStep 2: Prepare the part for Analysis ?Now you have prepared the part to analyze, you will enter the appropriate workbench ?From the Menu bar, select Start + Gener
14、ative Structure Analysis ?In the New Analysis Case window, select Static Analysis then OK to validate ?A new window is opened with the screw in the Analysis environment IBM Product Lifecycle Management Solutions / Dassault SystemesPage 10 Icons WB Step 3: Assign Boundary ConditionsStep 3: Assign Bou
15、ndary Conditions Setting the Boundary Conditions ?Before computing, you need to indicate the Boundary conditions ?Select Clamp icon from workbench ?Select one of the internal faces of the screw thread (Choose one of the screw ends) ?Select OK to confirm IBM Product Lifecycle Management Solutions / D
16、assault SystemesPage 11 Icons WB Step 3: Assign Boundary ConditionsStep 3: Assign Boundary Conditions ?Select Force Icon from workbench ?Select the end face of the screw ?Click in the X field and key in 950 lbf ?Key-in 50 lbf in the Y field ?The Norm value is automatically updated ?Select OK to conf
17、irm IBM Product Lifecycle Management Solutions / Dassault SystemesPage 12 Icons WB Step 4: Solve the problemStep 4: Solve the problem Computing the load problem ?Setting the Temporary file calculation ?Click on the Elfini Storage Location icon ?Key in E:Tmp in both fields ?The results will be stored
18、 on the disk. You should not need more than 50MB. To delete the results files, you can either manually delete them in Windows or click on the Clear button ?Select the Compute icon ?Check the Preview option ?Click on the OK button to launch the calculation ?After a few seconds, CATIA will come back w
19、ith an estimated time for computation of this problem. ?Click Yes to continue IBM Product Lifecycle Management Solutions / Dassault SystemesPage 13 Icons WB Step 5: Visualize the ResultsStep 5: Visualize the Results ?After computation, the results can be visualized ?The Von Mises icon is clickable w
20、hen the computation is finished ?Click on the black arrow of the visualization mode and select the Applies customized view parameters icon ?Check the Materials option ?Click OK to validate ?Click on the Von Mises icon ?Now you can see the Von Mises stress distribution on the deformed mesh model IBM
21、Product Lifecycle Management Solutions / Dassault SystemesPage 14 Icons WB Step 5: Visualize the ResultsStep 5: Visualize the Results ?Visualizing the Von Mises image ?To improve your view, hide Properties and Nodes and Elements using hide/show in their contextual menu ?Multi-select both Nodes and E
22、lements and Properties in the specification tree by holding down the CTRL key ?Click MB3 on Properties + Hide/Show ?Move mouse cursor over finite elements to visualize Von Mises values at each node ?You can modify the result display ?Double-click on the palette ?Enter 20 instead of 10 ?Click OK to c
23、lose the panel IBM Product Lifecycle Management Solutions / Dassault SystemesPage 15 Icons WB Step 6: Analyze the ResultsStep 6: Analyze the Results Displaying the cutting plane to see the inside part values ?Select the Cut Plane icon ?Select the view under the isometric predefined view ?Clicking an
24、d moving the rotation axis as shown by the yellow arrow ?To translate the cutting plane, click MB1 on the arc and drag it in the direction of the yellow arrow ?Uncheck the Show Cutting Plane option ?Move mouse cursor over finite elements to visualize Von Mises values on each node. IBM Product Lifecy
25、cle Management Solutions / Dassault SystemesPage 16 Icons WB Step 6: Analyze the ResultsStep 6: Analyze the Results ?Visualizing Von Mises extremas ?Click on the Search Image Extremas icon ?Click OK to validate ?The minimum and maximum Von Mises values are displayed directly on the deformed shape ?Y
26、ou can check that the maximum Von Mises value is lower than the Steel yield strength ?To get a better idea of the Von Mises results and deformation, you can animate this image with a maximum deformation scale factor ?Select Deformation Scale Factor icon ?Increase it to the maximum by dragging the cu
27、rsor to the end ?Select Animate icon ?Stop the animation ?Increase the default value to 10 ?Select Both Way option ?Activate Play ?Click OK to finish the review IBM Product Lifecycle Management Solutions / Dassault SystemesPage 17 Icons WB Step 6: Analyze the ResultsStep 6: Analyze the Results ?Defo
28、rmed mesh image ?Select the Deformation icon ?Now you will now create an Analysis report ?Select Basic Analysis Report icon ?An HTML file containing the Report of the Static Case analysis is displayed. It contains information about the static computation procedure and deformation and Von Mises image
29、s ?Close the Internet file ?Close the Analysis window without saving IBM Product Lifecycle Management Solutions / Dassault SystemesPage 18 Icons WB Step 7: Change the Design and ResolveStep 7: Change the Design and Resolve ?From the Analyzed results, you find the stress is higher than the yield stre
30、ngth of steel. To correct this, you need to modify the part ?Double click part screw on the structure tree to activate the design workbench ?Double click sketch.3 of shaft.1 and change the overall length value from 6.375 to 9 inches. ?Exit and update if you are not in Automatic Update mode IBM Produ
31、ct Lifecycle Management Solutions / Dassault SystemesPage 19 Icons WB Step 8: Reanalyzes the resultsStep 8: Reanalyzes the results ?Double click on Finite Element Model in the specification tree ?You should return to the Analysis workbench ?Click on the Compute icon to rerun the compute without preview ?Check the Von Mises stress by clicking again on the Von Mises icon ?You can check that the Maximum Von Mises stress is now less than the yield strength of steel