Workshop 3
Surface Effect Elements
Bolt Torque
3. Surface Effect Elements
Bolt Torque
Workshop Supplement
•
Apply a torque load to the bolt model below using surface effect
elements. Solve and review the global cylindrical UY results in the
postprocessor.
INTRODUCTION TO ANSYS 6.0 - Part 2
Description
October 30, 2001
Inventory #001572
W3-2
3. Surface Effect Elements
Bolt Torque
INTRODUCTION TO ANSYS 6.0 - Part 2
Loads and Material Properties
Workshop Supplement
October 30, 2001
Inventory #001572
W3-3
3. Surface Effect Elements
Bolt Torque
Workshop Supplement
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
INTRODUCTION TO ANSYS 6.0 - Part 2
1.
October 30, 2001
Inventory #001572
W3-4
3. Surface Effect Elements
Bolt Torque
Set the element type attribute pointer to 2 (SURF154) and create the surface effect
elements:
–
–
–
5.
Select all TYPE 2 elements and plot them with their element coordinate system
display turned on:
–
–
–
–
6.
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
Utility Menu > Select > Entities …
Utility Menu > PlotCtrls > Symbols …
Utility Menu > Plot > Elements
Or issue:
ESEL,S,TYPE,,2
/PSYMB,ESYS,1
EPLOT
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
INTRODUCTION TO ANSYS 6.0 - Part 2
4.
Workshop Supplement
October 30, 2001
Inventory #001572
W3-5
3. Surface Effect Elements
Bolt Torque
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
INTRODUCTION TO ANSYS 6.0 - Part 2
7.
Workshop Supplement
October 30, 2001
Inventory #001572
W3-6
3. Surface Effect Elements
Bolt Torque
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
INTRODUCTION TO ANSYS 6.0 - Part 2
8.
Workshop Supplement
October 30, 2001
Inventory #001572
W3-7
3. Surface Effect Elements
Bolt Torque
–
–
Main Menu > Preprocessor > Loads > -Loads- Apply > -Structural- Pressure > On Elements +
Or issue:
SFE,e_surf,2,PRES,,10000
INTRODUCTION TO ANSYS 6.0 - Part 2
10. Apply a 10,000 psi tangential pressure (along the element X direction) on the
SURF154 elements:
Workshop Supplement
October 30, 2001
Inventory #001572
W3-8
3. Surface Effect Elements
Bolt Torque
–
–
Utility Menu > PlotCtrls > Symbols …
Or issue:
/PSF,PRES,TANX,2
EPLOT
INTRODUCTION TO ANSYS 6.0 - Part 2
11. Change surface load symbols for “Tan-X pressures” to arrows:
Workshop Supplement
October 30, 2001
Inventory #001572
W3-9
3. Surface Effect Elements
Bolt Torque
–
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
INTRODUCTION TO ANSYS 6.0 - Part 2
12. Select everything and plot elements:
Workshop Supplement
October 30, 2001
Inventory #001572
W3-10
3. Surface Effect Elements
Bolt Torque
Workshop Supplement
–
Main Menu > Solution > -Analysis Type- Sol’n Control ..
–
Pick the “SAVE_DB” button in the Toolbar
–
–
Main Menu > Solution > -Solve- Current LS
Or issue:
(or select: Utility Menu > File > Save as Jobname.db)
/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
INTRODUCTION TO ANSYS 6.0 - Part 2
14. Save the database and obtain the solution using the PCG iterative solver:
October 30, 2001
Inventory #001572
W3-11
3. Surface Effect Elements
Bolt Torque
–
–
Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu ...
Or issue:
PLNSOL,U,Y
17. Save and exit ANSYS:
–
Pick the “QUIT” button
–
in the Toolbar
Or issue:
SAVE
FINISH
/EXIT
INTRODUCTION TO ANSYS 6.0 - Part 2
16. Plot the UY displacement:
Workshop Supplement
October 30, 2001
Inventory #001572
W3-12