lab4

Customer Training Material

W k h 9 1Workshop 9.1

Parameter Managementg

Introduction to ANSYSIntroduction to ANSYSMechanical

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Introduction to ANSYS Mechanical

Customer Training MaterialGoals Goal: Use the Workbench Parameter Workspace to setup multiple

scenarios to explore structural responses in the bracket shown. Material thickness will be varied in the gusset with the bracket

thickness held constant then the process will be reversed.

Gusset

Bracket

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Introduction to ANSYS Mechanical

Customer Training MaterialProject Schematic Open the Project page. From the Units menu verify: Project units are set to Metric (kg, mm, s, C, mA, mV).Project units are set to Metric (kg, mm, s, C, mA, mV). Display Values in Project Units is checked (on).

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Introduction to ANSYS Mechanical

Customer Training Material. . . Project Schematic1. From the Toolbox double click

Static Structural to create a new system.

1.

2. RMB the geometry cell and Import Geometry and browse toImport Geometry and browse to Bracket.stp. 2.

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Introduction to ANSYS Mechanical

Customer Training MaterialPreprocessing

3. Double click the Model cell to open the Mechanical application.

3.

4. Set/verify the working unit system: Units > Metric (mm, kg, N, s, mV, mA).

4.

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Customer Training Material. . . Preprocessing5. Highlight the part Bracket and

enter a thickness = 2mm in the details.

6. Highlight the part Gusset and enter a thickness = 1mm in the details.

7. Make both thicknesses parametric by toggling the check box.

5.

6.

7.

8. Highlight the Geometry branch and in the Property details

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and, in the Property details, toggle the Mass parameter on.

8.

Introduction to ANSYS Mechanical

Customer Training Material. . . Preprocessing9. Highlight the Connections branch, RMB >

Insert > Connections Group.9.

10 In the details for the connections group10. In the details for the connections group change the Auto Detections for Face/Edge to Yes.

10

11. Highlight the connections group RMB >

10.

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Create Automatic Connections. 11.

Introduction to ANSYS Mechanical

Customer Training MaterialEnvironment12. Apply constraints to the model (highlight

Static Structural branch (A5):a. Select the edge of one hole.b. RMB > Insert > Fixed Support.

a.

b. RMB Insert Fixed Support.

c. Highlight the face surrounding the fixed hole.d. RMB > Insert > Frictionless Support.

b.

d

c.

d.

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c.

Introduction to ANSYS Mechanical

Customer Training Material. . . Environment13. Apply Loads to the model:

a. Select the of the hole shown below.b. RMB > Insert > Force. c.c. In the Details switch to the component method.d. Enter a magnitude of -20 N in the X direction.

c.

d.

a.

d.

b.

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Customer Training MaterialSolution Setup14. Insert Results (highlight

Solution branch (A6):a. RMB > Insert > Stress > a.

Equivalent (von Mises).

15. In the result detail, toggle , ggthe Maximum result as a parameter.

15.

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Customer Training MaterialParameter Management16. Access the Parameter Set:

a. From the schematic double click Parameter Set.

When the parameter workspace opens make sure the 2 thicknesses, the mass and the stress are all shown in the parameter li tlist.

a.

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Introduction to ANSYS Mechanical

Customer Training Material. . . Parameter Management17. Enter thickness values as shown below. For the first 3 DPs the

bracket will be held constant while the gusset thickness varies. For the last 3 the reverse will be solved.

18. Update All Design Points will instruct Mechanical to execute a solve for each scenario in the Design Point table.

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18.

Introduction to ANSYS Mechanical

Customer Training Material. . . Parameter Management Once the update process begins a message will appear as shown

here. In fact the Mechanical application window will close during the update process. This is normal.

When the updates are complete the table will show calculated values for both output parametersvalues for both output parameters.

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Introduction to ANSYS Mechanical

Customer Training Material. . . Parameter Management19. There are several ways we can present the design point information. In

this case well see how output quantities vary with each design point:a. Highlight the output parameter Equivalent Stress Maximum (P5 here).b D bl li k th D i P i t V P5 h i i th T lb ( ib. Double click the Design Points Vs P5 choice in the Toolbox (again,

parameter numbers will vary depending on the order of their definition).

b.

a.

Repeat the above steps with the Geometry Mass parameter (P3 in this case).

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Customer Training Material. . . Parameter Management20. Highlight the stress per design point chart to display (here the charts

have been renamed according to their content):

20.

Stress per Design Point

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Stress per Design Point

Introduction to ANSYS Mechanical

Customer Training Material. . . Parameter Management21. Highlight the mass plot to display.

21.

Mass per Design Point

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Introduction to ANSYS Mechanical

Customer Training Material. . . Parameter Management Repeat step 19 and create a stress vs DP plot. In the properties window choose to display Geometry Mass on the

right side Y axis as shown below.

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Plots like this one allow us to visualize the trade off that often accompanies these kinds of choices.

WorkingwithNonParametricl ( )GeometryFiles(e.g.,STEP)

The previous exercise highlighted one way you can work withThepreviousexercisehighlightedonewayyoucanworkwithparametersinANSYSworkbench

ThebracketpartwasprovidedasaSTEPfile,whichisnotaparametric formatparametricformat

Youmodifiedthethicknessofthepart,butthegeometryneveractuallychangedthicknessisjustastructuralpropertyinthismodelsimilartohowcrosssectionalareaisastructuralpropertyforabeamelementbutthebeamelementitselfneverexhibitsanychangeinvolumeorthickness

Whenworkingwithanonparametricgeometryformat,youarenotabletomodifypreexistingdimensions,butyoucanaddfeaturestothemodelandmodifythosey

WorkingwithNonParametricl ( )GeometryFiles(e.g.,STEP)

IfyouimportasimpleLbracketasaSTEPfile,youcannotchangetheprei i di i h l h f h id hi kexistingdimensionssuchaslengthofeachsideorthickness

YouCANaddafilletinthecornerandthenmakethataparameterthatcanbeupdatedbyANSYS

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

IfyouimportthesamesimpleLbracketasaSolidWorks part,thenyoui di l h di icangainaccessdirectlytothepartdimensions

ANSYSwillimporttheCADparametersforuseinyouranalysis,butonlytheparameternamesthatbeginwithDSwillbeimported

Forexample,theSolidWorks partdimensionsmustberenamedtoincludeaDSprefix

SolidWorksSolidWorks

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

UseSolidWorks todrawaplate100mmx50mmx2mmthick Placea30mmdia holeinthecenteroftheplateanddimensionthe

locationoftheholerelativetothecenteroftheplate youcanuseconstructionlinestomarkthecenteroftheplate

MakethexdimensionandydimensionoftheholelocationDSparameters

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

Applyfrictionlesssupports(B)ononeendfaceandthebacksurface Applyafixedsupportononecorneredge(A) Apply10Nforceontheunsupportedendface(C)

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

SolveforvonMises stressandapplyanautomatedconvergencetooltofi h h i llrefinethemeshautomatically

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

PerformaparametricanalysistoevaluatethepeakvonMises stressasaf i f h l i ifunctionofholeposition

Lookonlyat2.5mmincrementsasshownbelow(only5designpoints)

WorkingwithParametricGeometryl ( l d k )Files(e.g.,SolidWorks)

T h t t d t d d i ti f th h l ff t k Mi TowhatextendtoxandydeviationsoftheholeeffectpeakvonMisesstress?

Whatisthestressconcentrationfactor(intension)forthecaseofthecentered hole and ho does it compare to o r e pectations from theor ?centeredholeandhowdoesitcomparetoyourexpectationsfromtheory?

1301_ENME442_lab4solidworks_parameters

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