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Bolt Torque
Workshop 3
Surface Effect Elements
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Workshop Supplement
Octob er 30, 2001
Invento ry #001572
W3-2
3. Surface Effect Elements
Bo l t Torque
Description
Apply a torque load to the bolt model below using surface effect
elements. Solve and review the global cylindrical UY results in the
postprocessor.
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Invento ry #001572
W3-3
3. Surface Effect Elements
Bo l t Torque
Loads and Material Properties
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Workshop Supplement
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Invento ry #001572
W3-4
3. Surface Effect Elements
Bo l t Torque
1. Enter ANSYS in the working directory specified by your instructor using bolt-torque
as the jobname.
2. Resume the bolt-torque.db1 database file:
Utility Menu > File > Resume from
Or issue:
RESUME,bolt-torque,db1
3. Enter the preprocessor and select areas 7 and 8, and then select all the nodes
attached to areas 7 and 8:
Main Menu > Preprocessor
Utility Menu > Select > Entities
Utility Menu > Plot > Nodes
Or issue:
/PREP7
ASEL,S,,,7,8
NSLA,,1
NPLOT
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Invento ry #001572
W3-5
3. Surface Effect Elements
Bo l t Torque
4. Set the element type attribute pointer to 2 (SURF154) and create the surface effect
elements: Main Menu > Preprocessor > -Attributes- Define > Default Attribs
Main Menu > Preprocessor > -Modeling- Create > Elements > -Surf / Contact- Surf Effect > No extra Node +
Or issue:
TYPE,2
ESURF,ALL
5. Select all TYPE 2 elements and plot them with their element coordinate system
display turned on: Utility Menu > Select > Entities
Utility Menu > PlotCtrls > Symbols
Utility Menu > Plot > Elements
Or issue:
ESEL,S,TYPE,,2
/PSYMB,ESYS,1
EPLOT
6. Create a local cylindrical coordinate system 11 at the global origin:
Utility Menu > WorkPlane > Local Coordinate Systems > Create Local CS > At Specified Loc +
Or issue:
LOCAL,11,1,0,0,0
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Workshop Supplement
Octob er 30, 2001
Invento ry #001572
W3-6
3. Surface Effect Elements
Bo l t Torque
7. Change the element coordinate system (ESYS) for the SURF154 elements to 11:
Main Menu > Preprocessor > -Modeling- Move / Modify > -Elements- Modify Attrib +
Utility Menu > List > Elements > Nodes + Attributes
Utility Menu > Plot > Elements
Or issue:
EMODIF,ALL,ESYS,11
ELIST
EPLOT
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Octob er 30, 2001
Invento ry #001572
W3-7
3. Surface Effect Elements
Bo l t Torque
8. Create a component named e_surf of all TYPE 2 elements:
Utiltity Menu > Select > Comp/Assembly > Create Component ...
Or issue:
CM,e_surf,ELEM
9. Turn off the element coordinate system:
Utility Menu > PlotCtrls > Symbols
Or issue:
/PSYMB,ESYS,0
EPLOT
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Invento ry #001572
W3-8
3. Surface Effect Elements
Bo l t Torque
10. Apply a 10,000 psi tangential pressure (along the element X direction) on the
SURF154 elements:
Main Menu > Preprocessor > Loads > -Loads- Apply > -Structural- Pressure > On Elements +
Or issue:
SFE,e_surf,2,PRES,,10000
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Invento ry #001572
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3. Surface Effect Elements
Bo l t Torque
11. Change surface load symbols for Tan-X pressures to arrows:
Utility Menu > PlotCtrls > Symbols
Or issue:
/PSF,PRES,TANX,2
EPLOT
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3. Surface Effect Elements
Bo l t Torque
12. Select everything and plot elements:
Utility Menu > Select > Everything
Utility Menu > Plot > Elements
Or issue:
ALLSEL
EPLOT
13. Constrain all DOFs on area 1 (base area of bolt at Z=0):
Main Menu > Preprocessor > Loads > -Loads- Apply > -Structural- Displacement > On Areas + Or issue:
DA,1,ALL
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Invento ry #001572
W3-11
3. Surface Effect Elements
Bo l t Torque
14. Save the database and obtain the solution using the PCG iterative solver:
Main Menu > Solution > -Analysis Type- Soln Control ..
Pick the SAVE_DB button in the Toolbar (or select: Utility Menu > File > Save as Jobname.db)
Main Menu > Solution > -Solve- Current LS
Or issue:
/SOLU
EQSLV,PCG
SAVE
SOLVE
15. Enter the general postprocessor and switch to the cylindrical results coordinate
system, and then turn on element outlines for contour plots:
Main Menu > General Postproc > Options for Outp ..
Utility Menu > PlotCtrls > Style > Edge Options ...
Or issue:
/POST1
RSYS,1
/EDGE,1,1,45
/GLINE,1,0
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Invento ry #001572
W3-12
3. Surface Effect Elements
Bo l t Torque
16. Plot the UY displacement:
Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu ...
Or issue:
PLNSOL,U,Y
17. Save and exit ANSYS:
Pick the QUIT buttonin the Toolbar
Or issue:
SAVE
FINISH
/EXIT