1. Ansys Examples Pdf

Trademarks of ANSYS, Inc. Or its subsidiaries in the United States or other countries. Updating a Workbench Project and Parameters from Excel. You can also find this guide in a PDF version on www.an. Of interest are pressure drop, average and maximum vorticity, and mixing factor of blood stream 1 at.

This tutorial is an educational tooldesigned to assist those who wish to learn how to use the ANSYS finiteelement software package. It is not intended as a guide for determiningsuitable modelling methods or strategies for any application. Theauthors of this tutorial have used their best efforts in preparing thetutorial. These efforts include the development,research and testing of the theories and computational models shown in the tutorial. The authors make no warranty of any kind, expressed orimplied, with regard to any text or models contained in this tutorial. Figure 1: Details of the Pressure Vessel - all dimensions in mm.Thereare standard theories available for the behaviour of thin andthick walled cylinders subjected to internal pressure. These equationscan befound in any text book on mechanics of solids or in any reference book.We can use these theories to predict the expected stresses in thepressure vessel due to the applied loading.

The calculations for thevarious stresses is shown on pages 328 to 329 of Practical Stress Analysis with Finite Elements (2nd Ed)by Bryan J. Mac Donald and is summarised in the table below. Step 7: Apply the Boundary Conditions.Although the solver already knows that we are performing an axisymmetric analysis due to an axisymmetric element being used, we still need to place a symmetry constraint on the edges of the model that touch the Y-axis.Preprocessor Loads Define Loads Apply Structural Displacement Symmetry B.C.

On Lines pick the lines on the axis of symmetry (i.e.You will probably get a warning saying that ' Bothsolid model and finite element boundary conditions have been applied tothis model. As solid loads are transferred to the nodes or elements,they can overwrite directly applied loads'. This is OK just click on Close to dismiss this dialog.Step 8: Apply the Internal Pressure Load. In the Main Menu click on Preprocessor Loads Define Loads Apply Structural Pressure On Lines.Click on all the lines representing the internal wall of the pressure vessel and then click on OK in the picker dialog box. The 'Apply Pres on a Line' dialog box will now appear. Enter 10000 as the pressure value as shown below. Step 9: Solve the Problem.In the Main Menu select Solution Analysis Type New Analysis.Make sure that Static is selected in the dialog box that pops up and then click on OK to dismiss the dialog.Select Solution Solve Current LS to solve the problem.Anew window and a dialog box will pop up.

Take a quick look at theinfromation in the window ( /STATUS Command) before closing it.Click on OK in the dialog box to solve the problem.Once the problem has been solved you will get a message to say that the solution is done, close this window when you are ready.Step 10: Examine the Results.In the Main Menu select General Postproc Plot Results Deformed Shape. Select Def + undef edge in order to show both the deformed and undeformed shapes.Your screen should look something like this. It is clear that the side wall of the pressure vessel has slightly 'bowed' out due to the internal pressure. The end caps have significantly deformed in comparison to the side wall. The maximum displacement is, however, approximately 2 x 10 -6 m which is well below the yield stress for steel - meaning our assumption of a linear elastic material is valid.

Note that ANSYS, by default, will exaggerate any deformation by scaling it up in order to make it obvious.Now let's examine the principal stresses: General Postproc Plot Results Contour Plot Nodal Solu Stress 1st Principal Stress, click on OK to display the plot, which should look like this. The first principal stress is the Hoop Stress and we are expecting a value of approximately 55,000 Pa based on our analytical calculations.

Clearly something is wrong with this plot. We are seeing very large stress concentrations at the sharp corner where the end caps join the side wall.

It is likely that the stress in the side wall itself is quite close to the predicted analytical value. Let's investigate this by only displaying results for the elements at the middle of the vessel side wall:. Utility Menu Select Entities. In the 'Select Entities' dialog box that appears make sure that 'Elements' is selected in the top box and then click on OK. SummaryThis tutorial has given you the following skills:.

The ability to model axisymmetric problems in ANSYS. The ability to select a subset of a finite element model and only examine the result for that subset.

Experiencein comparing the results obtained from your finite element model withother results and validating your results against the other results.Log Files / Input FilesThelog file for this tutorial may also be used as an input file toautomatically run the analysis in ANSYS. In order to use this file as aninput file save it to your working directory and then select Utility Menu File Read input from. andselect the file. You should notice ANSYS automatically building thefinite element model and issuing all the commands detailed above.Quitting ANSYSTo quit ANSYS select Utility Menu File Exit. In the dialog box that appears click on Save Everything (assuming that you want to) and then click on Ok.

Jos007 - unfortunately, evaluating the resultsIf a finite element analysis to the piping or BPV Code is slightly more nuanced than your questions imply. It appears that you are trying to perform an evaluation in accordance with ASME Section VIII, Division 2, Part 5, correct? Probably you have arrived there by apply the 'unlisted component' rules if ASME B31.3?What other loads are there on the component? You will need to evaluate those, too. Be glad to help you but I would need to know the whole picture. Are you expecting any cyclic loading? How about vacuum conditions or anything else that might result in compressive loads?

RE: Ansys Asme Pipe Stress Analysis - fast question (Structural). You are mixing two different failure modes.If you are actually following the rules of ASME Section VIII, Division 2, Part 5 (2013 Edition), then you will know that for satisfying Protection Against Plastic Collapse, the local membrane equivalent stress should be less than Spl (which is the greater of 1.5S or Sy). If that is not met, then your have not satisfied this failure mode.For satisfying Protection Against Failure From Cyclic Loading: Ratcheting, then the RANGE of primary-plus-secondary membrane-plus-bending should be less than Sps (which is the greater of 3S or 2Sy). Whether or not this is met, you still need to satisfy the other failure modes.And, for that configuration, you would still need to satisfy Protection Against Collapse From Buckling and Protection Against Local Failure.On the last one - Protection Against Local Failure, your geometry is one that is susceptible to such a failure mode. And a shell model is insufficient for making such a determination (the issue is in the inside corner of the lateral). RE: Ansys Asme Pipe Stress Analysis - fast question (Structural). Evening All,here: you can find my stress analysis of the solid model regarding the failure check against internal presure (only) according to ASME VIII div2 2013My biggest doubt is about the stress categorization, i'm not sure to consider the nature of the bending stress @ the nozzle intersection correctly:as you can see in the 'report', i assume the primary bending stress Pb = 0 (always) @ nozzle intersections, because it's a strong local discontinuity regionso, to check the stability of the item, i execute the following checks:considering A516 Gr65 @20°C (Sy/Su.

A couple of comments:A) You need to ensure that you are performing the Protection Against Plastic Collapse checks using the Design Pressure, and not the hydrostatic test pressure.B) Your assessment that, at the intersection, there is no Pb is appropriate.C) When performing the ratcheting check, you should be using the operating load ranges. SeeD) When performing the Protection Against Plastic Collapse and the Local Failure check (4S), you need to be using the load case combinations described in Table 5.3E) You are using ANSYS. Please note that the linearization scheme in ANSYS is NOT compliant with the requirements of 5-A.4.1.2 Step 2 (a).F) Your Figures make it next-to-impossible to see if the SCLs are appropriate. Please refer to Annex 5-A for SCL guidance.G) The Local Failure check is for primary membrane-plus-bending principal stresses only. It does not include secondary stresses nor peak. RE: Ansys Asme Pipe Stress Analysis - fast question (Structural). HI TGS4thx a lot for the answersabout the comments:A) I did that too, but with the Design Pressure i get accettable values, with the test pressure i have not.

Ansys Examples Pdf

I can't find load combinations with the test pressure for an elastic analysis. Does that mean i have to switch to an Elastic-Plastic Analysis or a Limit-Load Analysis to check the item against the Test Pressure? Is it mandatory?B) ok Cool. Do you think it's right to assume Pb = 0 along the longitudinal side too?