Stress analysis INVENTOR

Contents Chapter Part Modal and Stress Analysis Simulation 1: About this tutorial Open the Model for Modal Analysis Enter the Stress Analysis Environment Assign Material Add Constraints Preview Mesh Run Simulation View the Results Summar y 11 Simulation 2: About this tutorial 12 Copy Simulation 13 Create Parametric Geometry 14 Include Optimization Criteria 16 Add Loads 16 Set Convergence 17 Run Simulation 18 View the Results 19 Summar y 21 Chapter Assembly Stress Analysis 23 About this tutorial 23 Get Started 25 i Stress Analysis Environment Excluding Components Assign Materials Add Constraints and Loads Stress Analysis Settings Contact Conditions Generate Meshes Run the Simulation View and Interpret the Results Summar y Chapter 25 26 27 28 31 32 33 34 35 37 39 40 41 41 42 42 43 46 50 51 51 54 54 56 57 59 Assembly Modal Analysis 61 About this tutorial Open the Assembly Create a Simulation Study Exclude Components Assign Materials Add Constraints Create Manual Contacts Specify Mesh Options Preview Mesh and Run Simulation View and Interpret Results Summar y Chapter Contacts and Mesh Refinement 39 About this tutorial Open the Model Stress Analysis Environment Create a Simulation Exclude Components Assign Materials Add Constraints and Loads Define Contact Conditions Specify and Preview Meshes Run the Simulation View and Interpret the Results Copy and Modify Simulation Specify Local Mesh Controls Run the Simulation Again View and Interpret the Results Again Summar y Chapter 62 64 65 66 67 67 68 70 70 71 73 FEA Assembly Optimization 75 About this tutorial 76 ii | Contents Open the Assembly Define the Simulation Assign Materials Adding Constraints Adding Loads Modify the Mesh Preview the Mesh Create Parametric Geometry Optimization Criteria Run the Simulation View and Interpret the Results View and animate 3D plots View XY Plots Summar y Chapter 77 77 78 78 79 80 81 82 84 85 85 87 88 90 Stress Analysis Contacts 93 About this tutorial 93 Overview 94 Open the Assembly 94 How a Caulk Gun Works 96 Assembly Simulation 99 Contact Types 100 Bonded Contact 102 Separation Contact 103 Sliding and No Separation Contact 104 Separation and No Sliding Contact 107 Shrink Fit and No Sliding Contact 108 Spring Contact 110 Loads and Constraints 111 Simulation Results 112 Summary 114 Chapter Frame Analysis 117 About this tutorial Open the Assembly Frame Analysis Environment Frame Analysis Settings Assign Materials Change Beam Properties Change Direction of Gravity Add Constraints Add Constraints to the Next Beam Add Loads Run the Simulation View and Interpret Results 117 119 119 122 122 124 124 125 128 129 131 132 Contents | iii Summary 133 Chapter Frame Analysis Results 135 About this tutorial Get Started Frame Analysis Environment View and Interpret the Results Display Maximum and Minimum Values View Beam Detail Display and Edit Diagrams Adjust Displacement Display Animate the Results Generate Report Summary Chapter iv | Contents 135 136 137 139 140 141 142 144 146 147 148 149 150 151 152 154 154 157 159 160 164 165 166 167 169 170 171 Modal Type of Frame Analysis 173 About this tutorial Open the Assembly Frame Analysis Environment Create a Simulation Study Run the Simulation View the Results Animate the Results Summary Chapter 11 Frame Analysis Connections 149 About this tutorial Connections Overview Open the Assembly Frame Analysis Environment Change Direction of Gravity Add Custom Nodes Add Custom Nodes Change Color of Custom Nodes Assign Rigid Links Add Constraints Run the Simulation View the Results Assign a Release Run the Simulation Again View the Updated Results Summary Chapter 10 173 175 175 175 176 177 178 179 Dynamic Simulation - Part 181 About this tutorial Open the Assembly Degrees of Freedom Automatic Constraint Conversion Assembly Constraints Add a Rolling Joint Building a 2D Contact Add Spring, Damper, and Jack Joint Define Gravity Impose Motion on a Joint Run a Simulation Using the Output Grapher Simulation Player Summary Chapter 12 181 182 183 184 187 189 190 193 195 196 197 198 199 202 Dynamic Simulation - Part 205 About this tutorial Work in the Simulation Environment Construct the Operating Conditions Add Friction Add a Sliding Joint Use the Input Grapher Use the Output Grapher Export to FEA Publish Output in Inventor Studio Summary Chapter 13 205 206 208 210 212 213 217 219 223 225 Assembly Motion and Loads 227 About this tutorial Open Assembly Activate Dynamic Simulation Automatic Joint Creation Define Gravity Insert a Spring Define the Spring Properties Run the Simulation Insert a Contact Joint Edit the Joint Properties Add Imposed Motion View the Simulation Results View the Simulation Results (continued) Export the Data Summary 227 229 231 231 232 232 235 236 237 239 241 241 242 243 244 Contents | v Chapter 14 FEA using Motion Loads 245 About this tutorial Open Assembly File Run a Simulation Generate Time Steps Export to Stress Analysis Use the Motion Loads in Stress Analysis Generate a report Summary 246 247 249 249 249 253 256 257 Index 259 vi | Contents Part Modal and Stress Analysis Simulation 1: About this tutorial Modal analysis Category Simulation Time Required 20 minutes Tutorial Files Used PivotBracket.ipt You will create two simulations: modal analysis of the part and a parametric structural static analysis on the same part The Modal Analysis tutorial walks through the process of defining and performing a structural frequency analysis, or modal analysis, for a part The simulation generates the natural frequencies (Eigenvalues) and corresponding mode shapes which we view and interpret at the end of the tutorial The second simulation is a parametric study on the same model Parametric studies vary the design parameters to update geometry and evaluate various configurations for a design case We perform a structural static analysis with the goal of minimizing model weight Objectives ■ Create a simulation for modal analysis ■ Override the model material with a different material ■ Specify constraints ■ Run the simulation ■ View and interpret the results Prerequisites ■ Familiarity with the ribbon user interface and Quick Access Toolbar ■ Familiarity with the use of the model browser and context menus ■ See the Help topic “Getting Started” for further information Navigation Tips ■ Use Show in the upper-left corner to display the table of contents for this tutorial with navigation links to each page ■ Use Forward in the upper-right corner to advance to the next page Next (page 3) | Chapter Part Modal and Stress Analysis Open the Model for Modal Analysis Let’s get started on the Modal Analysis simulation first On the Quick Access Toolbar, click the Open command Set your project file to Tutorial_Files.ipj if not already set Select the part model named PivotBracket.ipt Click Open Previous (page 1) | Next (page 3) Enter the Stress Analysis Environment The stress analysis environment is one of a handful of Inventor environments that enable specialized activity relative to the model In this case, it incorporates commands for doing part and assembly stress analysis To enter the stress analysis environment and start a simulation: Click the Environments tab in the ribbon bar The list of available environments is presented Click the Stress Analysis environment command Click Create Simulation The Create New Simulation dialog box displays Specify the name Modal Analysis In the Simulation Type tab, select Modal Analysis Leave the remaining settings in their current state and click OK A new simulation is started and the browser is populated with stress analysis-related folders Previous (page 3) | Next (page 4) Open the Model for Modal Analysis | Assign Material For any component that you want to analyze, check the material to make sure that it is defined Some Inventor materials not have “simulation-ready” properties and need modification before using them in simulations If you use an inadequately defined material, a message displays Modify the material or select another material You can use different materials in different simulations and compare the results in a report To assign a different material: In the ribbon bar, in the Material panel, click Assign Materials Click in the Override Material column to activate the drop-down list Select Aluminum-6061 Click OK NOTE Use the Styles and Standards Editor to modify materials if they are not completely defined You can access the editor from the lower left corner of the Assign Materials dialog box Previous (page 3) | Next (page 4) Add Constraints Next, we add the boundary conditions, a single constraint on the interior cylindrical face To add the constraint: In the ribbon bar, in the Constraints panel, click the Fixed Constraint command The docked dialog box displays Select the face as shown | Chapter Part Modal and Stress Analysis About this tutorial Generate and export motion loads Category Simulation Time Required 20 minutes Tutorial File Used Windshield Wiper.iam 246 | Chapter 14 FEA using Motion Loads NOTE Click and read the required Tutorial Files Installation Instructions athttp://www.autodesk.com/inventor-tutorial-data-sets Then download the tutorial data sets and the required Tutorial Files Installation Instructions, and install the datasets as instructed Use Dynamic Simulation to generate loads to export and use in Stress Analysis Objectives ■ Export motion loads for use in stress analysis Prerequisites ■ Complete the Dynamic Simulation - Part tutorial ■ Know how to set the active project, navigate the model space with the various view tools, and perform common modeling functions, such as sketching and extruding ■ See the Help topic “Getting Started” for further information Navigation Tips ■ Use Next or Previous at the bottom-left to advance to the next page or return to the previous one Next (page 247) Open Assembly File To begin, set your active project to Tutorial_Files Open Dynamic Simulation ➤ Windshield Wiper.iam Open Assembly File | 247 On the ribbon, click Environments tab ➤ Begin panel ➤ Dynamic Simulation to switch to the Dynamic Simulation environment The dynamic simulation commands populate the ribbon bar If you are prompted to view the Dynamic Simulation tutorial, click No If a message warns that the mechanism is overconstrained, click OK The redundancy is not important for the purposes of this tutorial Previous (page 246) | Next (page 249) 248 | Chapter 14 FEA using Motion Loads Run a Simulation To generate the motion loads, you run a simulation and then export the loads to Stress Analysis Click the Run command on the Simulation Player to run the simulation Allow the simulation to finish When the simulation finishes, click Output Grapher on the Results panel located You use the Output Grapher to select and export the motion loads Previous (page 247) | Next (page 249) Generate Time Steps In the Output Grapher browser, nested under Export to FEA, right-click Time Steps, and then select Generate Series In the Generate Time Steps dialog box, enter 16 in the Number of Steps field Ensure the Between Time Steps option is selected Take the default start time of s Enter s (the duration of this simulation) in the End field Click OK These values generate four load intervals per second, for four seconds The time step series is added to the Output Grapher browser Previous (page 249) | Next (page 249) Export to Stress Analysis On the toolbar located at the top of the Output Grapher, select the Export to FEA command You are prompted to select a part to analyze Run a Simulation | 249 Select the Crank Sway part You can orbit the assembly or use Select Other to access the part NOTE You can select more than one part to export You cannot select parts within a subassembly unless the subassembly is set to Flexible In the Export to FEA dialog box, click OK Next, you specify the load bearing faces For this part, the holes on either end of the arm contain the load bearing faces For the Point-Line joint, select the face as shown 250 | Chapter 14 FEA using Motion Loads In the dialog box, select the Revolution joint to complete the field Select the other face as shown Export to Stress Analysis | 251 NOTE Alternatively, you could use the Automatic Face Selection option to allow the software to select the load-bearing faces automatically Click OK The loads are exported and ready for retrieval in Stress Analysis Close the Output Grapher 252 | Chapter 14 FEA using Motion Loads Previous (page 249) | Next (page 253) Use the Motion Loads in Stress Analysis In the Exit panel, click Finish Dynamic Simulation, then click Environments tab ➤ Stress Analysis environment becomes active Click the Create Simulation The stress analysis command In the Create New Simulation dialog box, on the Simulation Type tab, check the box next to Motion Loads Analysis In the Part list box, select the Crank Sway component The list displays all components that were exported to FEA Next, specify the Time Step to be analyzed The Time Step list displays all 16 time steps from the Dynamic Simulation environment You choose the time step to analyze Use the Motion Loads in Stress Analysis | 253 Click OK The loads for the time step you specified are added to the browser, nested under the Loads node Click the Simulate command to run the solution 254 | Chapter 14 FEA using Motion Loads When the simulation finishes, evaluate the results for that motion interval Previous (page 249) | Next (page 256) Use the Motion Loads in Stress Analysis | 255 Generate a report Finally, you can generate a report of the analysis results The report pertains to the selected time step at the time the report is generated In the Report panel, click Report In the Report dialog box, specify the information you want included in the report ■ If you want a complete report, click OK and the report will proceed ■ If you want only certain information in the report, click Custom and then specify the content for the report The report displays in your internet browser or as a Word document, depending on the output format you select The report and associated files are saved to the location designated in the Report dialog box By default, this location is the same as the part or assembly you are analyzing If you want to save multiple reports, one of the following ■ Use Save As in your internet browser to save a copy of each report ■ Rename the report file and generate an additional report Repeat as appropriate Previous (page 253) | Next (page 257) 256 | Chapter 14 FEA using Motion Loads Summary In this tutorial, you learned how to: ■ Generate motion loads for a selected part ■ Access and use those loads within Stress Analysis ■ Generate reports of analysis results Remember to check Help for further information Previous (page 256) Summary | 257 258 Index relative parameters results 207 C coherent masses and inertia continuity of laws 207 207 207 O D Output Grapher dynamic simulation assumptions 207 coherent masses and inertia continuity of laws 207 R 207 relative parameters 208, 217 207 259 | Index 260 ... (page 23) | Next (page 25) Stress Analysis Environment We are ready to enter the stress analysis environment On the ribbon, click Environments tab ➤ Begin panel ➤ Stress Analysis On the Manage... assembly stress analysis To enter the stress analysis environment and start a simulation: Click the Environments tab in the ribbon bar The list of available environments is presented Click the Stress. .. displays Stress results versus parametric configurations Previous (page 18) | Next (page 21) 20 | Chapter Part Modal and Stress Analysis Summary In this last tutorial for Part Stress Analysis,