Training Guide TopSolid Fea

Transcription

1 Training Guide i

2 2012, Missler Software. 7, Rue du Bois Sauvage F Evry, FRANCE Web: All rights reserved. This information is subject to change without warning. No material may be reproduced or transmitted, regardless of the manner, electronic or mechanical means used or purpose, without formal written consent from Missler Software. TopSolid is a registered trademark of Missler Software. TopSolid is a product name of Missler Software. The information and the software contained within this document are subject to change without prior warning and should not be construed as a commitment by Missler Software. The software covered by this document is supplied under license, and may only be used and duplicated in compliance with the terms of this license. Version 7.6 Rev.01 ii Missler Software

3 Contents Quick Analysis... 1 Creating the Analysis Preparation Document... 1 Starting the Analysis Solving... 6 Displaying the Stresses... 6 Amplifying the Result... 7 Generating the Calculation Report... 8 Customizing the Support Adding a Logo Modifying the Font and the Text Changing the Font for the Whole Document Changing the Header Advanced Analysis Creating a Simplified Version Loads and Blockings Manual Mesh Simplifying the Model Local Meshes Modal Analysis Free Exercise: Modal Analysis Buckling Calculation Notes Individual Course Evaluation Form Missler Software iii

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5 Quick Analysis This first exercise teaches you how to perform a static analysis using the wizard. Quick Analysis Import the package named TopSolid.Fea.Us.TopPkg. Open the 1 - Bracket - Express folder, and then the Bracket part document. Creating the Analysis Preparation Document This type of document allows you to define calculation assumptions and, if necessary, to modify the part needed for the calculation without modifying the model. Bring up the contextual menu on the Bracket part document s upper tab, select Analysis Preparation, and then choose Blank Template. Fill in the Include Part or Assembly dialog box as follows: - Source Document: Bracket. - Representation: select Detailed Representation from the drop-down list. In the New Analysis dialog box, fill in the following fields: - Analysis to Create: select Linear Static Analysis from the drop-down list. - Uncheck Fast Method. - Check Wizard. Notes: There are three types of analysis: - Linear static; - Modal; - Linear buckling. Only the static analysis is discussed in detail throughout this guide, because of the limits set by the Express module. For your information, the Express module is limited to nodes. The fast method can only be used together with the Fea Advanced and Fea Assembly modules. This method means using the mesher of the INRIA (French National Institute for Research in Computer Science and Control) which provides results more quickly. Missler Software 1

6 Quick Analysis The holders of the Fea Express unique module (included in TopSolid Pro for example) can only use the face by face mesher of the CETIM (technical center for mechanical engineers). The Fast Method option is then grayedout. In the Analysis tab, select the Wizard command. The following window opens automatically. The analysis validation wizard summarizes the state of the different stages of the analysis: - Material (the green flag indicates that the material is well-defined and that three steps still need to be validated) ; - Meshing; - Loads; - Limit conditions. In the Steps description column, click on Some geometries are still not meshed and, in the Possible actions column, double-click on Mesh study geometries. 2 Missler Software

7 Quick Analysis Choose the Face by face meshing method from the drop-down list. Keep the default values. Note: The default values are the best compromise between fast calculation time and more accurate results that we will obtain later when launching the solving process. The meshing progress bar appears. In the system bar at the very top of the screen, the meshing stage is then automatically activated. - Modeling Stage: This stage involves the operation to include the part or assembly document to analyze. - Simplification Stage: This stage includes the different operations for simplifying the geometry. - Definition Stage: This stage includes the compulsory analysis steps of a part. You should then end up with the following result: Note that a mesh is correct when triangles are equilateral. TopSolid automatically creates a Meshes folder in your document s Entities tree and also a Mesh operation in your document s Operations tree. There are three basic ways of editing this mesh: In the Meshes folder, bring up the contextual menu on Mesh, and then Edit. In the Operations tree, bring up the contextual menu on the meshing operation, and then Edit. In the graphical area, bring up the contextual menu on, and then Edit. In the Analysis tab, select the Wizard command again. Missler Software 3

8 Quick Analysis There is now a green flag in front of Geometries are all meshed. Click the No loads defined stage, and then double-click on Uniform surface load can be added. Select the upper face of the part on which to apply a surface force and set the value to 500N. Reverse the direction of the arrow, and then validate. A symbol for the surface load appears on the upper face. 4 Missler Software

9 The wizard window opens, indicating that the Load(s) defined stage is validated (green flag). Quick Analysis Select the last stage to be validated Insufficient boundary conditions, and then double-click on Clamp can be added. Select the end face, and then validate. A symbol for the clamp appears on the face. At this point, all the flags are green. Save your document. Missler Software 5

10 Quick Analysis Starting the Analysis Solving In the Analysis tab, select the Solver command. The solving progress bar appears. The solution of the analysis automatically creates a new analysis result document called Bracket (Linear Static Analysis 1) in the Project tree. The first result Norm of Displacements is shown in the graphical area. Displaying the Stresses In the Results tab, select Stresses Result, choose Von Mises from the drop-down list, and then validate. Repeat the operation by selecting this time the Tresca stresses. Each selected result is stored and will be used in the report. 6 Missler Software

11 Quick Analysis TopSolid automatically creates in the document s Entities tree a Results folder containing the following items: - Tresca Stresses; - Von Mises Stresses; - Norm of Displacements. You can switch between results by bringing up the contextual menu on the desired result and then selecting Set as Current. The bold title corresponds to the current result that is shown in the graphical area. Amplifying the Result In order to visually ascertain the result, the distortion can be exaggerated by modifying the scale factor. Set the Max Scale Factor to 2 and enter 0,5 in the Scale Factor field or use the cursor to reach this value. Using the Measure analysis tool, you can obtain all information from the selected node or item. Keep the Node default selection mode. Select a node (the junction point of the mesh for example). All the relevant information appears in the Result dialog section (displacements and stresses). Note that you can choose the Element selection mode if necessary. Missler Software 7

12 Quick Analysis Generating the Calculation Report In the Results tab, select Report Generation. Click the Browse button and select Report Static Analysis from the Standard Templates. Keep the Include in Project default option. This option allows you to save the report in the current project. Choose the Adobe Pdf export format from the drop-down list. Rename the report or keep the default name. The message Compiling report will appear very quickly on the screen, indicating us that the report is being generated. Click the project name and validate. 8 Missler Software

13 The report in PDF format is generated in the Project tree and shown on the screen. Quick Analysis Read the result, and then close the PDF document. Using the Alt + Tab key combination, bring the Report Preview document to front and close it. Missler Software 9

14 Customizing the Support Customizing the Support This exercise teaches you how to customize the logo and modify the text. Bring up the contextual menu on the project name and create a new document. In the Special tab, select Report Definition. Choose the Report Static Analysis template, and then validate. Rename the document to My Report. A window opens prompting you to choose the interface type. Select the interface you want. The report builder shows all the data of the standard report. Adding a Logo Double-click in the \LogoMissler.jpg field. Open the file corresponding to your logo. 10 Missler Software

15 In the Properties column, select Stretch and set the value to True. Customizing the Support The logo should fully appear in the box. Move the box to the center just by dragging it. Modifying the Font and the Text Modify the font of the text Static analysis report. To do this, click on the text, select the font Calibri and set the size to 20 points. Missler Software 11

16 Customizing the Support Changing the Font for the Whole Document Use the Ctrl + A key combination to select all your text. Choose the Calibri font. Press the Esc key to release the selection. Changing the Header Double-click the text to be modified. Enter your desired text, and then click OK. Close the document. Save the report. Drag the report template into the Defaults subfolder of the Templates folder in the Project tree. Generate a new calculation report using the template created before. 12 Missler Software

17 Advanced Analysis Advanced Analysis In the Project tree, open the 2 - Lever Simplification folder, and then the Lever part document. Creating a Simplified Version In the Operations tree, move the modeling cursor above the Trim by Profile 2 operation. Bring up the contextual menu on the part and select Others > Duplicate into Representation. In the current dialog box, check New, rename it to Calculation, and then validate. Note that TopSolid automatically creates the Calculation representation in the Representations folder. Move up the modeling cursor and save the document. Bring up the contextual menu on the Lever document s upper tab, select Analysis Preparation and choose Blank Template. - Source Document: Lever. - Representation: select Calculation from the drop-down list. Validate. In the New Analysis dialog box, fill in the following parameters: - Analysis to Create: choose Linear Static Analysis from the drop-down list. - Check Fast Method. - Uncheck Wizard. Missler Software 13

18 Advanced Analysis Loads and Blockings In the Analysis tab, select the Clamp command. Select the cylindrical face shown below, and then validate. Note: In the Advanced Options dialog section, you can impose a direction if necessary. Otherwise, the clamp is performed in all directions. In the Analysis tab, select the Surface Load command. Select the two cylindrical surfaces of the vertical axis. - Type: check Load. - Imposed: check the Z Direction and reverse the arrow direction. - Value: enter 2000N. Validate. Repeat the operation on the second vertical axis by checking the X direction. You should then end up with the following result. You can apply a transparency to the part to obtain the following rendering. Manual Mesh In the Mesh tab, select the Mesh Shape command. Select the Automatic meshing method and keep the default target size. 14 Missler Software

19 Advanced Analysis In the Analysis tab, select the Solver command. Simplifying the Model Keep in mind the previous calculation time. Now we will simplify the part by symmetry to accelerate the process. Close all documents except the Lever part document. Create a new analysis preparation document and rename it to Lever-Symmetry. In the Shape tab, select Make Locally Modifiable. Select the part and validate. This command allows you to perform operations on the part without modifying the original model. Create a trim by plane using the XZ plane. Block and add the loads using 1000N per face. Add an imposed displacement and fill in the fields as follows: - Geometries: select the symmetry face. - Direction: select the symmetry face. - Value: enter 0. Validate. A symbol for the imposed displacement is shown on the face. Missler Software 15

20 Advanced Analysis Mesh the shape in Automatic mode and keep the default target size value. In the Analysis tab, select the Solver command. The calculation time is twice faster than before. Save and close all documents. Local Meshes The mesh must be refined in the following cases: - near the holes; - near the cracks; 16 Missler Software

21 - in reentering corners; Advanced Analysis - where there is a sudden cross-section change; - in load transfer area: welding; - where there are concentrated loads. In short, you have to refine the mesh in areas with singularities or large amounts of stress. Open the 3 - Crank - Local Meshes folder, and then the Crank part document. Create a new analysis preparation document and select Blank Template. Validate the inclusion. Select Linear Static Analysis and check Wizard. Mesh the shape and keep the following default values: - Select the face by face meshing method from the drop-down list. - Set the target size to 5.1 mm. - Set the minimum size to 3.6 mm. - Set the size tolerance to 0.36 mm. Missler Software 17

22 Advanced Analysis In the Mesh tab, select Local Size. Select the hole edges and the crank pin edges as shown below, and enter 1 mm in the Size of Elements field. The mesh is then recalculated as shown below. Note: TopSolid automatically creates a Local Meshes folder in your document s Entities tree. If you want to modify the local meshes, you have to go through this folder. You can also turn off the meshing auto refresh in case the shape or the mesh settings are modified by right-clicking on a meshing in the Entities tree and then unchecking Auto Refresh. If auto refresh is off, the meshing is recalculated when a solving is launched. Add a surface load of 750N at the end of the crank pin, and then add a clamp into the hole. 18 Missler Software

23 Advanced Analysis In the Analysis tab, select the Solver command. Select the Stresses Result command and choose Von Mises from the drop-down list. Save and close the documents. Modal Analysis Note: Natural frequency is the frequency at which a system naturally vibrates once it has been set into motion. In other words, natural frequency is the number of times a system will oscillate (move back and forth) between its original position and its displaced position, if there is no outside interference. Open the 4 - Plane - Natural Frequencies folder, and then the Wing part document. Create a new analysis preparation document and select Blank Template. Validate the inclusion. Select Modal Analysis from the drop-down list and check Wizard. Mesh the shape and keep the following default values: - Select the Automatic meshing method from the drop-down list. - Set the target size to 2.3 mm. Add a clamp at the end of the shape. Missler Software 19

24 Advanced Analysis In the Analysis tab, select the Solver command. Open the Results folder in the Entities tree. The first natural frequency is calculated. Select the Scale Factor command to amplify the results. Use the Natural Frequencies command, and then select the first five natural frequencies. The Results folder now contains the five natural frequencies. The fifth natural frequency is the current one. To see the results of a frequency, bring up the contextual menu on a frequency and select Set as Current. Open the analysis preparation document and change the mesh to 1. Open the analysis solving document. As you can see, the calculation update is automatically restarted. The calculation is much longer but also more accurate. Free Exercise: Modal Analysis Open the Plane part document. Repeat the same steps as for the wing. Note that the clamp will be applied on the back face. 20 Missler Software

25 Buckling Calculation Advanced Analysis Buckling is an instability phenomenon that is characterized by the occurrence of transverse deformations in members under compression forces. Open the 5 - Cylinder Rod - Buckling folder, and then the Cylinder Rod part document. Create a new analysis preparation document and select Blank Template. Validate the inclusion. Select Linear Static Analysis and check Wizard. Mesh the shape and fill in the following values: - Select the face by face meshing method from the drop-down list. - Set the target size to 10mm. - Set the minimum size to 5mm. - Set the size tolerance to 1mm. In the Mesh tab, select Local Size. Refine the junction edge of the small cylinder with the large cylinder and enter 2.5mm in the Size of Elements field. Add a surface load of 5000N at the end of the rod, and then add a clamp on the back cylindrical face as shown below. Select New Analysis again. Choose Linear Buckling Analysis from the drop-down list and use the previous static analysis. Select the Solver command. Use the Scale Factor command to amplify the results. Choose the Load Factors command and select the first five factors. If necessary, increase the scale factor. The first factor is shown below with a scale of 1.5. It provides a critical value of Thus, this part will break at about twice the load, i.e N. Missler Software 21

26 Notes Notes 22 Missler Software

27 Notes Missler Software 23

28 Notes 24 Missler Software

29 ... Individual Course Evaluation Form (To be completed and returned to the training instructor at the end of the course) TopSolid FEA Name :... Company :... Date(s) from... to... By completing this individual evaluation form, you are helping to improve the quality and usefulness of the training provided in the future. Please complete it carefully. Number of people during the course: Onsite at your company? YES NO GENERAL ASSESSMENT Poor Average Good Excellent Overall, this course has been: What grade would you assign? LOGISTIC Poor Average Good Excellent Orientation (quality, organization, user-friendliness, etc.) Physical setup (room, materials, etc.) TRAINING Poor Average Good Excellent Instructor's teaching method Group relationship (participation, sharing of experiences) Quality and clarity of educational materials (documentation) Balance between Theory and Practice Consistent presentations with what has been announced Training Content DURATION No Somewhat no Somewhat yes Yes Does the overall duration of the course seem appropriate? If no, was it? Too short Too long PACE No Somewhat no Somewhat yes Yes Does the overall pace of the course seem appropriate? If no, was it? Too slow Too fast USE OF ACQUIRED KNOWLEDGE IN THIS TRAINING No Somewhat no Somewhat yes Yes Have you found this training to be useful in your work? Do you think you can put the acquired knowledge into use quickly? Do you believe that you have achieved your objectives upon completion of this course? Comments and suggestions:... Missler Software 25 Notes