3-d bracket workshop 10a loading and solution. workshop supplement february 7, 2006 inventory...
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3-D Bracket
Workshop 10A
Loading and Solution
February 7, 2006Inventory
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Workshop Supplement
10A. Loading and Solution
3-D Bracket
Description
• Apply loads to the 3-D bracket model below and solve using the Sparse iterative solver. The model has already been meshed with SOLID95 20-noded bricks, and Young’s Modulus has been set to 30e6 psi.
February 7, 2006Inventory
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Workshop Supplement
10A. Loading and Solution
3-D Bracket
Loads and Boundary Conditions
1000 psi on top area
Symmetry B.C. on hole surface
Fix kp 28 in z-direction
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10A. Loading and Solution
3-D Bracket
1. Enter ANSYS in the working directory specified by your instructor using “bracket-3d” as the jobname.
2. Resume the “bracket-3d.db1” database file:– Utility Menu > File > Resume from …
• Select the “bracket-3d.db1” database file, then [OK]
– Or issue:
RESUME,bracket-3d,db1
3. Enter the solution processor and restrain translations normal to hole surfaces:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > Symmetry B.C. > On Areas
• Pick the areas on the hole surfaces (area numbers 3, 4, 5, and 6), then [OK]
– Or issue:
/SOLU
DA,3,SYMM
DA,4,SYMM
DA,5,SYMM
DA,6,SYMM
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10A. Loading and Solution
3-D Bracket
4. To prevent rigid body motion along the Z axis, constrain UZ translation on keypoint 28:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > On Keypoints
• Enter keypoint number “28” in the ANSYS picking menu followed by [Enter]
• [OK]
• Set Lab2 = “UZ”, then [OK]
– Or issue:
DK,28,UZ
5. Apply 1000 psi pressure load to the top surface area of the 3-D bracket:– Main Menu > Solution > Define Loads > Apply > Structural > Pressure > On Areas
• Pick the top surface area (area number 11) , then [OK]
• Set VALUE = 1000, then [OK]
– Or issue:
SFA,11,1,PRES,1000
6. Select the Sparse direct solver:
– Main Menu > Solution > Analysis Type > Sol’n Controls
• Pick the “Sol’n Options” tab
• Select the “Sparse direct” solver, then [OK]
– Or issue:
EQSLV,SPARSE
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10A. Loading and Solution
3-D Bracket
7. 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]
– Or issue:
SAVE
SOLVE
8. After the solution is completed, enter the general postprocessor and plot the von Mises stress (SEQV):
– Main Menu > General Postproc > Plot Results > Contour Plot > Nodal Solu
• Select Nodal Solution > Stress > von Mises stress, then [OK]
– Or issue:
/POST1
PLNSOL,S,EQV
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10A. Loading and Solution
3-D Bracket
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10A. Loading and Solution
3-D Bracket
9. Change the viewing angle and replot:– Utility Menu > PlotCtrls > View Settings > Viewing Direction ...
• XV = -0.5
• YV = -0.25
• ZV = 1
• [OK]– Or issue:
/VIEW,1,-0.5, -0.25, 1
/REPLOT
10. Save the ANSYS database:– Pick the “SAVE_DB” button in the Toolbar
Connecting Rod
Workshop 10BLoading and Solution
February 7, 2006Inventory
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10B. Loading and Solution
Connecting Rod
Description
• Apply loads to the connecting rod (half-symmetry) model below and solve using the SPARSE solver. The model has already been meshed with SOLID95 20-noded bricks, and Young’s Modulus has been set to 30e6 psi.
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10B. Loading and Solution
Connecting Rod
Loads and Boundary Conditions
Symmetry B.C. on Areas
1000 psi on Area
Constrain UZ DOF on Node
February 7, 2006Inventory
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10B. Loading and Solution
Connecting Rod
1. Enter ANSYS in the working directory specified by your instructor using “conn-rod” as the jobname.
2. Resume the “conn-rod.db1” database file:– Utility Menu > File > Resume from …
• Select the “conn-rod.db1” database file, then [OK]
– Or issue:
RESUME,conn-rod,db1
3. Enter the solution processor and restrain translations normal to the larger hole surfaces:
– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > Symmetry B.C. > On Areas
• Pick the areas on the hole surfaces (area numbers 8 and 9), then [OK]
– Or issue:
/SOLU
DA,8,SYMM
DA,9,SYMM
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10B. Loading and Solution
Connecting Rod
4. Apply symmetry boundary constraints on all area surfaces at Y=0:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > Symmetry B.C. > On Areas
• Pick the areas on the plane Y=0 (area numbers 7, 10 and 13), then [OK]
– Or issue:
DA,7,SYMM
DA,10,SYMM
DA,13,SYMM
5. To prevent rigid body motion along the Z axis, constrain UZ translation on node 702:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > On Nodes
• Enter node number “702” in the ANSYS picking menu followed by [Enter]
• [OK]
• Set Lab2 = “UZ”, then [OK]
– Or issue:
D,702,UZ
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10B. Loading and Solution
Connecting Rod
6. Apply 1000 psi pressure load to area number 11 located on the smaller hole:– Main Menu > Solution > Define Loads > Apply > Structural > Pressure > On Areas
• Pick area number 11, then [OK]
• Set VALUE = 1000, then [OK]
– Or issue:
SFA,11,1,PRES,1000
7. Select the Sparse direct solver:– Main Menu > Solution > Analysis Type > Sol’n Control
• Pick the “Sol’n Options” tab
• Select the “Sparse direct” solver, then [OK]
– Or issue:
EQSLV,SPARSE
8. 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]
– Or issue:
SAVE
SOLVE
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10B. Loading and Solution
Connecting Rod
9. After the solution is completed, enter the general postprocessor and plot the von Mises stress (SEQV):
– Main Menu > General Postproc > Plot Results > Contour Plot > Nodal Solu
• Select Nodal Solution > Stress > von Mises stress, then [OK]
– Or issue:
/POST1
PLNSOL,S,EQV
10. Save the ANSYS database:– Pick the “SAVE_DB” button in the Toolbar
Wheel
Workshop 10CLoading and Solution
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10C. Loading and Solution
Wheel
Description
• Apply loads to the wheel model shown in the next slide and solve using the SPARSE solver.
• The model has already been meshed with SOLID45 bricks, SOLID95 pyramids, and SOLID92 tets.
• Young’s Modulus has been set to 30e6 psi and density has been set to 0.00073 lbf-s2/in4.
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10C. Loading and Solution
Wheel
Loads
Angular Velocityof 525 rad/sec
Constrain UY DOFon Node 33 Symmetry B.C.
on Areas
SymmetryB.C. onAreas
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10C. Loading and Solution
Wheel
1. Enter ANSYS in the working directory specified by your instructor using “wheelb-omega” as the jobname.
2. Resume the “wheelb-omega.db1” database file:– Utility Menu > File > Resume from …
• Select the “wheelb-omega.db1” database file, then [OK]– Or issue:
RESUME,wheelb-omega,db1
3. Select the areas from the area component name “areas_1”:– Utility Menu > Select > Component Manager
• Highlight areas_1 and click on the Select Component/Assembly Icon
– Utility Menu > Plot > Areas– Or issue:
CMSEL,S,AREAS_1
APLOT
4. Apply symmetry boundary conditions on the selected set of areas:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > Symmetry B.C. > On Areas
• [Pick All]– Or issue:
/SOLU
DA,ALL,SYMM
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10C. Loading and Solution
Wheel
5. Select everything and plot areas:– Utility Menu > Select > Everything …
– Utility Menu > Plot > Areas
– Or issue:
ALLSEL,ALL,ALL
APLOT
6. To prevent rigid body motion, constrain UY translation on node 33:– Main Menu > Solution > Define Loads > Apply > Structural > Displacement > On Nodes
• Enter node number “33” in the ANSYS picking menu followed by [Enter]
• [OK]
• Set Lab2 = “UY”, then [OK]
– Or issue:
D,33,UY
7. Apply rotational velocity of 525 rad/sec about global Y axis:– Main Menu > Solution > Define Loads > Apply > Structural > Inertia > Angular Velocity > Global
• Set OMEGY = 525
• [OK]
– Or issue:
OMEGA,0,525
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10C. Loading and Solution
Wheel
8. Select the Sparse direct solver:– Main Menu > Solution > Analysis Type > Sol’n Control
• Pick the “Sol’n Options” tab
• Select the “Sparse direct” solver, then [OK]
– Or issue:
EQSLV,SPARSE
9. 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]
– Or issue:
SAVE
SOLVE
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10C. Loading and Solution
Wheel
10. After the solution is completed, enter the general postprocessor and plot the von Mises stress (SEQV):
– Main Menu > General Postproc > Plot Results > Contour Plot > Nodal Solu
• Select Nodal Solution > Stress > von Mises stress, then [OK]
– Or issue:
/POST1
PLNSOL,S,EQV
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10C. Loading and Solution
Wheel
11. Expand the results about the Z-axis of local coordinate system 11 (cylindrical):– Utility Menu > WorkPlane > Change Active CS to > Specified Coord Sys …
• KCN = 11
• [OK]
– Utility Menu > PlotCtrls > Style > Symmetry Expansion > User-Specified Expansion ...
• NREPEAT = 16
• TYPE = “Local Polar”
• PATTERN = “Alternate Symm”
• DY = 22.5
• [OK]
– Or issue:
CSYS,11
/EXPAND,16,LPOLAR,HALF,,22.5
/REPLOT
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10C. Loading and Solution
Wheel
12. Turn expansion off:– Utility Menu > PlotCtrls > Style > Symmetry Expansion > No Expansion …
– Utility Menu > Plot > Replot
– Or issue:
/EXPAND
/REPLOT
13. Save and exit ANSYS:– Pick the “SAVE_DB” button in the Toolbar
– Pick the “QUIT” button in the Toolbar
