3-d bracket

3-D Bracket

Workshop 10A

Loading and Solution

February 7, 2006Inventory

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10A. Loading and Solution3-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.


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10A. Loading and Solution3-D BracketLoads 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 Solution3-D Bracket1. 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:

/SOLUDA,3,SYMMDA,4,SYMMDA,5,SYMMDA,6,SYMM


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10A. Loading and Solution3-D Bracket4. 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 Solution3-D Bracket7. 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:

SAVESOLVE

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:/POST1PLNSOL,S,EQV


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10A. Loading and Solution3-D Bracket


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10A. Loading and Solution3-D Bracket9. 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


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10B. Loading and SolutionConnecting 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 SolutionConnecting RodLoads and Boundary Conditions

Symmetry B.C. on Areas

1000 psi on Area

Constrain UZ DOF on Node


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10B. Loading and SolutionConnecting Rod1. 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:/SOLUDA,8,SYMMDA,9,SYMM


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10B. Loading and SolutionConnecting Rod4. 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,SYMMDA,10,SYMMDA,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 SolutionConnecting Rod6. 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]


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


SAVESOLVE


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10B. Loading and SolutionConnecting Rod9. 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:

/POST1PLNSOL,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 SolutionWheel

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 SolutionWheelLoads

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 SolutionWheel1. 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_1APLOT

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:

/SOLUDA,ALL,SYMM


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10C. Loading and SolutionWheel5. Select everything and plot areas:

– Utility Menu > Select > Everything …– Utility Menu > Plot > Areas– Or issue:

ALLSEL,ALL,ALLAPLOT

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 SolutionWheel8. 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]


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


SAVESOLVE


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10C. Loading and SolutionWheel10. 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:

/POST1PLNSOL,S,EQV


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10C. Loading and SolutionWheel11. 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 SolutionWheel12. 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

3-d bracket

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