Crank Shaft Workshop 5 Submodeling

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft Description Perform a submodeling analysis on the crank shaft model below. The submodel will consist of the region around the pin holes. Full ModelSubmodel

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft Loads and Material Properties

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 1.Enter ANSYS in the working directory specified by your instructor using “crank- coarse” as the jobname. 2.Resume the “crank-coarse.db1” database file: –Utility Menu > File > Resume from … –Or issue: RESUME,crank-coarse,db1 3.Enter POST1 and plot the von Mises stress for the coarse model: –Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu... –Or issue: /POST1 PLNSOL,S,EQV

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 4.Change the jobname to “crank-fine”: –Utility Menu > File > Change Jobname … –Or issue: FINISH /FILNAME,crank-fine 5.Enter the preprocessor and clear the coarse mesh: –Main Menu > Preprocessor > MeshTool … –Or issue: /PREP7 VCLEAR,ALL 6.Plot the volumes, then do a pairwise intersection of volumes 1, 5, and 4: –Utility Menu > Plot > Volumes –Main Menu > Preprocessor > -Modeling- Operate > -Booleans- Intersect > -Pairwise- Volumes + –Or issue: VPLOT VINP,1,5,4

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 7.Delete volumes 2, 3, and 6 and all entities below volumes 2, 3, and 6: –Main Menu > Preprocessor > -Modeling- Delete > Volume and Below + –Or issue: VDELE,2,3,1,1 VDELE,6,,1,1 8.Plot areas and then delete areas 29 and 30 and all entities below areas 29 and 30: –Main Menu > Preprocessor > -Modeling- Delete > Area and Below + –Utility Menu > PlotCtrls > Pan, Zoom, Rotate … [Fit] –Or issue: ADELE,29,30,1,1 /AUTO,1 APLOT

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 9.Clear divisions from all lines: –Main Menu > Preprocessor > MeshTool … –Or issue: LESIZE,ALL,,,-1,,1 10.Plot volumes and then specify an element size of 1 on areas 39, 40, 43, and 44: –Utility Menu > Plot > Volumes –Main Menu > Preprocessor > MeshTool … –Or issue: VPLOT AESIZE,39,1 AESIZE,40,1 AESIZE,43,1 AESIZE,44,1 11.Mesh volumes 7 and 8 using VSWEEP: –Main Menu > Preprocessor > MeshTool … –Or issue: VSWEEP,ALL

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 12.Select the outer surface nodes at a radius of 9 inches: a) Define a local cylindrical coordinate system at X=0, Y=0, Z=17.5 and rotate 90 degrees about the local Y axis (i.e. THZX=90): –Utility Menu > WorkPlane > Local Coordinate Systems > Create Local CS > At Specified Loc + Enter “0,0,17.5” in the ANSYS Input window followed by [Enter] [OK] KCS = “Cylindrical 1” THZX = 90 [OK] –Or issue: LOCAL,11,1,0,0,17.5,,,90

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 12.(cont’d) b) Select nodes at X=9 and then plot the nodes: –Utility Menu > Select > Entities … –Utility Menu > Plot > Nodes –Or issue: NSEL,S,LOC,X,9 NPLOT

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 13.Write the nodes to a file called “crank-fine.node”: –Main Menu > Preprocessor > -Modeling- Create > Nodes > Write Node File … –Or issue: NWRITE,crank-fine,node 14.Save the database: –Utility Menu > File > Save as Jobname.db (or pick the “SAVE_DB” button in the Toolbar) –Or issue: SAVE 15.Resume the “crank-coarse.db1” database file again: –Utility Menu > File > Resume from … –Or issue: RESUME,crank-coarse,db1 16.Enter the general postprocessor and interpolate DOFs: –Main Menu > General Postprocessor > Submodeling > Interpolate DOF [OK] –Or issue: /POST1 CBDOF

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 17.Resume the “crank-fine.db” database file: –Utility Menu > File > Resume Jobname.db (or pick the “RESUM_DB” button in the Toolbar) –Or issue: RESUME,crank-fine,db 18.Select everything and then plot volumes: –Utility Menu > Select > Everything –Utility Menu > Plot > Volumes –Or issue: ALLSEL VPLOT 19.Enter the solution processor and apply symmetry constraints on areas 40 and 43: –Main Menu > Solution > -Loads- Apply > -Structural- Displacement > -Symmetry B.C.- On Areas + –Or issue: /SOLU DA,40,SYMM DA,43,SYMM

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 20.Read in the cut boundary constraints from the “crank-fine.cbdo” file and then plot elements: –Utility Menu > File > Read Input from … –Utility Menu > Plot > Elements –Or issue: /INPUT,crank-fine,cbdo EPLOT

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 21. Save the database and obtain the submodel solution: –Utility Menu > File > Save as Jobname.db (or pick the “SAVE_DB” button in the Toolbar) –Main Menu > Solution > -Solve- Current LS –Or issue: SAVE SOLVE 22.Turn off the display of the local coordinate system and then save the database: –Utility Menu > PlotCtrls > Symbols … Select “None” for Boundary condition symbol Set CS = Off under Other Symbols [OK] –Utility Menu > File > Save as Jobname.db –Or issue: /PBC,ALL,,0 /PSYMB,CS,0 SAVE

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 23.Enter the general postprocessor and plot the von Mises stress for the submodel model: –Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu... –Or issue: /POST1 PLNSOL,S,EQV

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 24.Plot stresses on the cut boundary and compare with coarse model results (crank- coarse.db1) in Step 25: –Utility Menu > Select > Entities … –Main Menu > General Postproc > Plot Results > -Contour Plot- Nodal Solu … –Or issue: NSEL,S,LOC,X,9 ESLN NSLE PLNSOL,S,EQV

Workshop Supplement October 30, 2001 Inventory # W Submodeling Crank Shaft 25.Resume the “crank-coarse.db1” database file and then: –Issue the following commands: LOCAL,11,1,0,0,17.5,,,90 NSEL,S,LOC,X,8,9 ESLN NSLE PLNSOL,S,EQV 26.Exit ANSYS: –Pick the “QUIT” button in the Toolbar –Or issue: FINISH /EXIT,NOSAVE