Lathe Cutter

Workshop 2A

Stress Analysis

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2A. Stress Analysis Lathe Cutter

Description

• Solve a 3-D stress analysis of the lathe cutter model below. Review the results in the general postprocessor by:

1) plotting the displacements2) listing reaction forces3) plotting the von Mises stress4) animating the von Mises stress

Resolve the solution using a different set of constraints and compare the stress results to the first solution.

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2A. Stress AnalysisLathe Cutter Loads and Material Properties for the first solution:

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2A. Stress AnalysisLathe Cutter Loads and Material Properties for the second solution:

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2A. Stress AnalysisLathe Cutter1. Enter ANSYS in the working directory specified by your instructor using “cutter” as

the jobname.

2. Set the GUI Preferences to Structural:– Main Menu > Preferences …

• Select “Structural”, then [OK]

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2A. Stress AnalysisLathe Cutter3. Import the “cutter.igs” IGES file using the “No defeaturing” option:

– Utility Menu > File > Import > IGES …• Select “No defeaturing”, then [OK]• Select “cutter.igs’, then [OK]

– Or issue:/AUX15 IOPTN,IGES,NODEFEAT IGESIN,cutter,igs,

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2A. Stress AnalysisLathe Cutter4. Scale the model by converting centimeters to inches:

– Main Menu > Preprocessor > Operate > Scale > Volumes +• [Pick All]

– Enter 1/2.54 for RX, RY, and RZ– Set IMOVE to “Moved”, then [OK]

– Or issue:VLSCAL, ALL, , , 1/2.54, 1/2.54, 1/2.54, , 0, 1

– Utility Menu > Plot > Volumes– Or issue:

VPLOT

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2A. Stress AnalysisLathe Cutter5. Read input from “cutter-area.inp” to create a small area for applying pressure load at

tip:– Utility Menu > File > Read Input from …

• Select “cutter-area.inp”, then [OK]– Or issue:

/INPUT,cutter-area,inp

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2A. Stress AnalysisLathe Cutter6. Specify the element type:

– Main Menu > Preprocessor > Element Type > Add/Edit/Delete …• [Add ...]

– Select “Structural Solid” and “Tet 10node 92”, then [OK]• [Close]

– Or issue:ET,1,SOLID92

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2A. Stress AnalysisLathe Cutter7. Define elastic modulus for material 1 to be 10e6 (Aluminum):

– Main Menu > Preprocessor > Material Props > Material Models …• Structural -> Linear -> Elastic -> Isotropic• Set EX = 10e6 (Young’s modulus in psi for Aluminum)• Set PRXY = .32• [OK]• Select Material > Exit

– Or issue:MP,EX,1,10e6MP,PRXY,1,.32

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2A. Stress AnalysisLathe Cutter8. Activate smartsize meshing and mesh the model with tetrahedral elements:

– Main Menu > Preprocessor > MeshTool … • Activate “Smart Size”• Set Smart Size level to 4• [Mesh]• [Pick All]• [Close]

– Or issue:SMRT,4MSHAPE,1,3DMSHKEY,0VMESH

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2A. Stress AnalysisLathe Cutter9. Apply area “symmetry” constraint to restrain attachment region:

– Utility Menu > Plot > Areas– Main Menu > Solution > -Loads- Apply > -Structural- Displacement > -Symmetry B.C.- On Areas +

• Pick areas 18, 19, 25, and 26, then [OK]– Or issue:

DA,18,SYMMDA,19,SYMMDA,25,SYMMDA,26,SYMM

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2A. Stress AnalysisLathe Cutter10. Apply pressure load at tip:

– Main Menu > Solution > -Loads- Apply > -Structural- Pressure > On Areas +• Pick area 1, then [OK]• VALUE = 10000• [OK]

– Or issue:SFA,1,1,PRES,10000

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2A. Stress AnalysisLathe Cutter11. Save the database and obtain the solution:

– Click the “SAVE_DB” button in the Toolbar (or select: Utility Menu > File > Save as Jobname.db)– Main Menu > Solution > -Solve- Current LS

• Review the “/STATUS Command” window and then close it• [OK]• [Close] - to close the yellow message window after the solution is completed

– Or issue:/SOLUSOLVE

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2A. Stress AnalysisLathe Cutter12. Review the results:

12a. Plot displacements:– Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu ...

• Select “DOF solution” and “Translation USUM”, select “Def + undef edge”, then [OK]– Or issue:

/POST1PLNSOL,U,SUM,2,1

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2A. Stress AnalysisLathe Cutter

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2A. Stress AnalysisLathe Cutter12b. List reaction forces:

– Main Menu > General Postproc > List Results > Reaction Solu ...• Select “All items”, then [OK]

– Or issue:PRRSOL

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2A. Stress AnalysisLathe Cutter

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2A. Stress AnalysisLathe Cutter12c. Plot von Mises stress:

– Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu ...• Select “Stress” and “von Mises SEQV”, then [OK]

– Or issue:PLNSOL,S,EQV

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2A. Stress AnalysisLathe Cutter12d. Capture the image then minimize :

– Utility Menu > Plot Cntrls > Capture Image– Minimize the window for later comparison

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2A. Stress AnalysisLathe Cutter12e. Animate the von Mises stress:

– Utility Menu > PlotCtrls > Animate > Deformed Results ...• Select “Stress” and “von Mises SEQV”, then [OK]

– Or issue:PLNSOL,S,EQVANCNTR,10,0.5

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2A. Stress AnalysisLathe Cutter

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2A. Stress AnalysisLathe Cutter13. Close the animation and delete the area symmetry constraints:

• [Close]– Utility Menu > Plot > Areas– Main Menu > Solution > -Loads- Delete > -Structural- Displacement > On Areas +

• Pick areas 18, 19, 25, and 26, then [OK]• [OK]

– Or issue:DADELE,18,ALLDADELE,19,ALLDADELE,25,ALLDADELE,26,ALL

14. Apply “ALL DOF” constraint to areas 18, 19, and 26:– Main Menu > Solution > -Loads- Apply > -Structural- Displacement > On Areas +

• Pick areas 18, 19, and 26, then [OK]• Select “All DOF” , then [OK]

– Or issue:DA,18,ALLDA,19,ALLDA,26,ALL

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2A. Stress AnalysisLathe Cutter15. Change the title:

– Utility Menu > File > Change Title …• Type in the title: Lathe Cutter - with ALL DOF constraint on areas at hole• [OK]

16. Save the database and obtain the solution:– Pick the “SAVE_DB” button in the Toolbar (or select: Utility Menu > File > Save as Jobname.db)– Main Menu > Solution > -Solve- Current LS

• [OK]• [Close]

– Or issue:SAVE/SOLUSOLVE

17. Review the results:– Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu ...

• Select “Stress” and “von Mises SEQV”• [OK]

– Or issue:PLNSOL,S,EQV

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2A. Stress AnalysisLathe Cutter

Open minimized plot from previous analysis to compare results

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2A. Stress AnalysisLathe Cutter17. Save and exit ANSYS:

– Pick the “QUIT” button from the Toolbar (or select: Utility Menu > File > Exit...)• Select “Save Everything”• [OK]

– Or issue:FINISH/EXIT,ALL

2-D Corner BracketTutorial

Workshop 2BStress Analysis

January 20, 2001

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2B. Stress Analysis2-D Corner Bracket Tutorial

Description

• This workshop introduces you to ANSYS tutorials — solved, step-by-step examples that are available on-line in HTML format. The problem consists of a static analysis of a corner bracket modeled with 2-D plane stress elements.

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2B. Stress Analysis2-D Corner Bracket Tutorial1. Enter ANSYS in the working directory specified by your instructor using “bracket” as

the jobname.

2. Access the ANSYS on-line tutorials:– Utility Menu > Help > ANSYS Tutorials

• Open the “Structural Tutorial” folder• Select the “Static Analysis of a Corner Bracket” folder• Perform steps 1 through 26

– Or issue the following path in your browser’s “Go to:” window:Unix: \ansys57\docu\english\ansyshelp\Hlp_UI_Tutorials.htmlIntel-PC: D:/ansys57/docu/english/tuthelp.chm

(Note, ask your instructor for the path name on your machine that points to the TUTORToc.htm file)