3 Introductory Examples v81 601

8/6/2019 3 Introductory Examples v81 601

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ANSYS Problem #1(Beam Deflection)

Find the deflection of the beam given below.


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The following is the step-by-step procedure for the beam deflection problem using the ANSYS GUI(Graphic User Interface) environment. Using the left button of the mouse, click on everything that istyped bold and type everything that is italicizedbelow.

(Go To ANSYS/Faculty Utility Menu)File

Change Jobname then type Beam_Deflection

(Go To Main Menu)Preprocessor

Element TypeAdd/Edit/Delete

AddStructural & Beam & 2D elastic 3 & OK

Close Element Type window

Real ConstantsAdd/Edit/Delete

Add

OK(Click inside the AREA box and type) 8(IZZ) 10.667(Height) 4OKClose

Material PropsMaterial Models & Structural & Linear& Elastic & Isotropic

(Click inside the EX box and type) 20e6OKA message will appear (Note: PRXY will be set to 0.0). Click OK

Close Material Models window

PreprocessorModeling

CreateNodes

In Active CS(Click inside the NODE box and type) 1(then click) Apply(Click inside the NODE box and type) 2(X=) 60(then click) Apply(Click inside the NODE box and type) 3(X=) 120(then click) OK

(Go To Utility Menu)

PlotCtrlsNumbering

(Go to NODE and click) OFF (then OFF will be toggled to ON)OK

PlotNodes

(GoTo Main Menu)Preprocessor

Create


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ElementsAuto-Numbered

Thru Nodes(Pick nodes) 1 & 2 (then click) Apply (Node 1 is on the origin of Coord. axis)(Pick nodes) 2 & 3 (then click) OK

(GoTo Utility Menu)

FileSave as Jobname.db (Check the working directory)

(GoTo Main Menu)Solution

Define LoadsApply

StructuralDisplacement

On Nodes(Pick node number) 1 & OK (Node1 is on the origin)(Lab2) All DOF (DOFs to be constrained)

(Value) 0OK

Force/MomentOn Nodes

(Pick node number) 3 & OK(Click arrow box inside of the Lab box and choose) FY(Value) -100OK

(GoTo Utility Menu)PlotCtrls

NumberingElem/Attrib numbering

Click arrow box to choose Element numbers & OKPlot

Click Elements

(GoTo Main Menu)Solution

SolveCurrent LS

(Read Message and click) OKClick OK on the information message Solution is Done!

Close STATUS command window

(GoTo Utility Menu)File

Save as Jobname.db


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(GoTo Main Menu)General Postproc

Plot ResultsContour Plot

Nodal SoluDOF Solution &Y-Component of displacement(Undisplaced shape key, choose) Deformed shape with undeformed model

OK

List ResultsNodal Solution

DOF Solution &Y-Component of displacementOK

Close PRNSOL command window

(GoTo Utility Menu)File

Exit & Save everything & OK

The following is the ANSYS commands and their descriptions ofbeam.log.

/BATCH * When batch mode is used, use this command./FILNAM, beam * Instructs Ansys to save all information in files starting with *beam*/PREP7 * Enters the preprocessing phase of the analysisET,1,3 * Sets Element Type 3 (beam element)R,1,8,10.667,4 * Defines geometry, cross section area, inertia, and height.MP,EX,1,20e6 * Defines material property, Youngs modulusN,1 * node 1 => x=0, y=0N,2,60 * node 2 => x =60, y=0N,3,120 * node 3 => x=120, y=0

/PNUM, NODE,1 * Prints node number when using plot commands.NPLOT * Plots nodesE,1,2 * Generate element 1 connecting node 1 and node 2.E,2,3 * element 2 connecting node 2 and node 3SAVE,beam,db * Saves model database as created to this pointFINISH * Finishes /prep7, go to begin level/SOLU * Starts Solution phase of analysisD,1,ALL,0 * known displacement dx=0, dy=0 at node 1F,3,FY,-100 * Defines a force on node 3 in the y-direction/PNUM,ELEM,1 * Prints element number when using plot commands.EPLOT * Plots elements.SOLVE * Solves the model as defined

FINISH * Finishes solution process, go to begin level./POST1 * Post-processingPLDISP,1 * Plots displacementsPRNSOL,U * Prints displacements (UX,UY,UZ)FINISH * Finishes /post1, go to begin level/EXIT * Exit


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ANSYS Problem #2Stress Concentration at a Hole in a Plate

A plate having a hole is uniformly loaded at its ends. The objective of this example is to obtain stressdistribution around the hole using ANSYS. You will learn a Boolean operation (Subtract) to draw thegeometry and use the symmetry boundary conditions to simplify the problem. The von Mises stress

Seqv() will be used for the stress contour plot.


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Analysis Type(s): Static analysis (ANTYPE = 0), submodelingElement Type(s): 2-D 6-node triangular solid elements (PLANE2)

2-D isoparametric solid elements (PLANE42)2-D structural solid p-elements (PLANE146)

Test CaseDetermine the maximum stress as a circular hole cut into a square plate loaded with uniform

tension P.


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The following is the step-by-step procedure for the Plate with a hole stress concentration problem usingthe ANSYS GUI (Graphic User Interface) environment. Using the left button of the mouse, click oneverything that is typed bold and type everything that is italicizedbelow.

(Go to Utility Menu)File

Change Jobname : Plate

Change Title(click inside the box)A square plate with a round hole

(Go to Main Menu)Preprocessor

Element TypeAdd/Edit/Delete

AddStructural Solid & Triangle 6node 2 & OK

Options(Element behavior, K3) Plane Strs w/ thk & OK

Close

Real ConstantsAdd/Edit/Delete & Add & OK

THK : 1& OKClose

Material PropsMaterial Models & Structural & Linear& Elastic & Isotropic

OK(Click inside the EX box) 3e7(Click inside the NUXY box) 0.3& OKClose Material Models window

ModelingCreate

AreasRectangle

By Dimensions(Click X1 box) 0(Click X2 box) 6(Click Y1 box) 0(Click Y2 box) 6OK (Defines a rectangle by two opposite corner points (0,0) and (6,6))

CircleBy Dimensions

(Click RAD1 Box) 0.5OK (Defines a circle centered at the origin with radius=0.5)

OperateBooleans

SubtractAreas

(Click on base area from which to subtract) Click A1 (rectangle) & Apply(Click on area to be subtracted) Click A2 (circle) & OK(Subtract the circle from the rectangle to make the problem domain.)


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(GoTo Utility Menu)

PlotCtrlsNumbering

(GoTo KP and click) OFF (then you will have ON)(GoTo LINE and click) OFF (then you will have ON) & OK

Plot

Lines

(GoTo Main Menu)Preprocessor

MeshingMeshTool

Click on the Keypts SET button(Pick keypoints 2 and 4)& OK(Click the SIZE box)1& OK

Click on the Keypts SET button(Pick keypoints 3)& OK

(Click the SIZE box)1.5& OK

Click on the Keypts SET button(Pick keypoints 5 and 6)& OK(Click the SIZE box)0.3& OK

Click the Mesh button(Pick the problem area)& OK

SolutionDefine Loads

Apply

StructuralDisplacement

Symmetry B.COn Lines

(Pick lines X=0 & Y=0 and then click) OK

PressureOn Lines

(Pick the line with pressure (L2) and then click) OK(Click Pressure value box VAL1)1000& OK

(GoTo Utility Menu)

FileSave as Jobname.db (Check the working directory)

(Go To Main Menu)Solution

SolveCurrent LS

(Read Message) OK(Solution is done) CloseClose the/STATUS command window


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(Go To Main Menu)General Postproc

Plot ResultsContour Plot

Nodal SoluStress & (Scroll down upper left box until you see) von Mises stress(Undisplaced shape key, choose) Deformed shape with undeformed model & OK

(Go To ANSYS Toolbar Menu)Click POWRGRPH, then click PowerGraphics to Off& OK


List ResultsPercent Error& Close

(Go To Utility Menu)File

Write DB Log File

(Write Database Log to) plate.log (This will make an ANSYS command input file.)Exit : Save Everything & OK (Same as QUIT in ANSYS Toolbar Menu)


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The following is the ANSYS commands and their descriptions ofplate.log./BATCH * When batch mode is used, use this command./FILNAM,plate * Instructs Ansys to save all information in files starting with plate/TITLE,Square Plate

with a Round Hole * Titles the analysis/PREP7 * Enters the preprocessing phase of the analysisET,1,82 * Sets Element Type 1 to 82, 2-D, 8 Node Quadrilateral

MP,EX,1,3e7 * Sets a Youngs modulus (in X direction) to 3,000,000RECTING,,6,,6 * Defines a rectangle by two opposite corner keypoints,

in this case (0,0) and (6,6)PCIRC,.5 * Defines a circle with a radius of 0.5. By default,

the center of the circle is at the origin.ASBA,1,2 * Subtracts area 2 from area 1 generating area 3.KESIZE,ALL,1.5 * Specifies element edge length 1.5 near all the keypoints.KESIZE,5,.3 * Specifies element edge length 0.3 near keypoint 5.KESIZE,6,.1 * Specifies element edge length 0.1 near keypoint 6.AMESH,3 * Meshes area 3.SAVE,plate,db * Saves model database as created to this point/SOLU * Starts Solution phase of analysis

/PNUM,KPOI,1 * Instructs Ansys to display keypoint numbers for allsubsequent plot commands

/PBC,ALL,,1 * Plots boundary conditionsKPLOT * Plots keypointsDL,10,3,SYMM * Defines the symmetry constraints by choosing line number 10 for area 3.DL,9,3,SYMM * Defines the symmetry constraints by choosing line number 9 for area 3.SFL,2,PRES,1000 * Defines surface loading on line 2 with the value of 1000./PSF,PRES,,2 * Adds pressure symbols to the display.lplot * Plots linesSAVE,plate,db * Saves model database as created to this pointSOLVE * Solves the model as defined/POST1 * Starts Post Processor phase of analysis

/psf,pres,,0 * Removes pressure symbols from the display.PLDISP,1 * Plots the analysis results for the displaced model overlaid with

the undeformed model outlinePLNSOL,S,X * Plots the X-stress within the model/EXIT,ALL,plate * Exits Ansys and saves the entire model database and results

to files previously defined


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ANSYS Problem # 3Thermal Analysis

Determine the temperature distribution in the cross-section of the conducting bar.

Properties: L = 50 cmT1 = 100 CH = 2 W/m2KK = 0.1 W/mKT0 = 0 C


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The following is the step-by-step procedure for the Conducting bar temperature distribution problemusing the ANSYS GUI (Graphic User Interface) environment. Using the left button of the mouse, clickon everything that is typed bold and type everything that is italicizedbelow.

(Go To Utility Menu)File

Change Jobname: Conduction-Bar, OK

Change Title: Thermal Analysis, OK

(Go To Main Menu)Preferences

Thermal , OK

PreprocessorElement Type

Add/Edit/DeleteAdd

Thermal Solid : Quad 4node 55 & OKClose

Material PropsMaterial Model & Thermal & Conductivity

IsotropicThermal Conductivity Kxx : 0.1 & OKClose

PreprocessorModeling

CreateAreas

Rectangle

By dimensionsX1 , X2 X-coordinates : 0 , 0.25Y1 , Y2 Y-coordinates : 0, 0.5& OK

CreateKeypoints

In Active CSX,Y,Z Location in active CS : 0.5, 0& ApplyX,Y,Z Location in active CS : 0.5 , 0.25& OK

(Go To Utility Menu)PlotCtrls

NumberingClick KP, LINE, AREA to toggle them to On.OK

PlotKeypoints


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ModelingCreate

AreasArbitrary

Through KPs

Click Keypoints 2, 5, 6, 3 & OK

(Go To Utility Menu)Plot

Lines


MeshingMeshTool

Click on the Lines SET button(Pick Line 1)& OK

NDIV 10& SPACE -0.3 & Apply

(Pick Line 4)& OKNDIV 10& SPACE 3 & Apply

(Pick Line 2)& OKNDIV 10& SPACE 0.3& Apply

(Pick Line 5)& OKNDIV 5& SPACE 3& Apply

(Pick Line 6)& OK

NDIV 5& SPACE 0.6& Apply

(Pick Line 7)& OKNDIV 8& SPACE 0.3& Apply

(Pick Line 3)& OKNDIV 8& SPACE 3& OK

Click the Mesh ButtonClick on Pick All

(Go To Main Menu)

SolutionDefine Loads

ApplyThermal

ConvectionOn lines

Pick Lines 3 and 7 & OKFilm Coefficient: 2Bulk Temperature: 100& OK


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TemperaturesOn nodes

Pick nodes (select nodes along line 1) & OKTemperature: 0& OK

(Go To Main Menu)Solution

Analysis TypeNew Analysis

Steady State & OK

SolveCurrent LS

(Read Message) OK(Solution is done) Close


Plot Results

Contour PlotNodal Solution

DOF Solution: Temperature & OK

(Go To Utility Menu)PlotCtrls

Hard CopyPrint to: click ABE116h1 & OK


Plot Results

Vector PlotPredefined

Flux and Gradient: Thermal flux TF & OK

(Ansys Utility Menu)PlotCtrls

Capture ImageFilePrint

Print to & click ABE116h1 & OK

(Close this window)

(Ansys Main Menu)General Postproc

List ResultsPercent Error(Click PowerGraph offat the Ansys Tool Bar Menu)Close

(Ansys Tool Bar)Save DBQuit & Save Everything & OK

Documents

3 Introductory Examples v81 601