In selecting loading rates for quasi-static analyses, it is recommended that you begin with faster loading rates and decrease the loading rates as necessary to converge on a quasi-static solution more quickly. The goal of the forming process is to quasi-statically form a channel with a punch displacement of 0.03 m. We now know that the shortest step time for the forming analysis is 0.00714 s. Figure 13–8 shows the displaced shape of the second mode. The frequency analysis shows that the blank has a fundamental frequency of 140 Hz, corresponding to a period of 0.00714 s. Superimpose the undeformed model shape on the deformed model shape. Advance the plot to the second mode of the blank. The deformed model shape for the first vibration mode is plotted (it is a rigid body mode).
From the main menu bar, select Plot Deformed Shape or use the tool in the toolbox. When the analysis is complete, enter the Visualization module and open the output database file created by this job. Submit the job for analysis, and monitor the solution progress. This leaves the blank constrained with a symmetry boundary condition applied to the left end.Ĭreate a job named Forming-Frequency with the following job description: Channel forming - frequency analysis. Delete all boundary conditions except the boundary condition named CenterBC. Open the Boundary Condition Manager, and examine the boundary conditions in the Extract Frequencies step. The frequency of the second mode will determine the appropriate time period for the quasi-static analysis in Abaqus/Explicit. Therefore, the first mode extracted will be a rigid body mode. In this analysis the left end of the blank is constrained in the x-direction and cannot rotate about the normal however, it is not constrained in the y-direction. Since the frequency extraction step is a linear perturbation procedure, nonlinear material properties will be ignored. For more information about the Getting Started plug-ins, see “Running the Getting Started with Abaqus examples, ” Section 82.1 of the Abaqus/CAE User's Guide.īefore starting, open the model database file for the channel forming example created in “Abaqus/Standard 2D example: forming a channel, ” Section 12.6. To run the script from Abaqus/CAE, select Plug-ins Abaqus Getting Started highlight Forming a channel and click Run.
#GETTING STARTED WITH ABAQUS 6.14 PDF HOW TO#
Instructions on how to fetch the script and run it within Abaqus/CAE are given in Appendix A, “Example Files.”Ī plug-in script for this example is available in the Abaqus/CAE Plug-in toolset. Scripts are available in the following locations:Ī Python script for this example is provided in “Forming a channel, ” Section A.12. Run one of these scripts if you encounter difficulties following the instructions given below or if you wish to check your work. Abaqus provides scripts that replicate the complete analysis model for this problem. Use Abaqus/CAE to modify the model for this simulation. 13.5.1 Preprocessing-rerunning the model with Abaqus/Explicit