ANSYS Sample Beam Problem

ANSYS – Sample 2-D Problem - Axisymmetric Rev. 11/19/05 Preparation Make a sketch of the structure Choose your global reference frame Calculate the coordinates of keypoints Look up material properties, thickness. ANSYS Setup Create a directory for your ANSYS files Login and execute ANSYS from the START Menu – CAD Programs/ ANSYS/ ANSYS 9 Change your jobname, title, default directory, and Output File Set Preferences - Structural, h-code [PlotCtrls] >Zoom/Pan/Rotate (drag this menu to the right of your workspace) ______Create Model Define Model Elements >Preprocessor >Element Type >Add/Edit/Delete [Add] (Solid, Quad 8 node 82) [Options…] (Plane stress w/ thickness) >Real Constants [Add] THK (0.5) >Material Properties (enter or select from library) >Material Model >Structural >Linear >Elastic >Isotropic EX (3e7) NUXY (0.27) [Save_db] Create Rectangles >Modeling >Create >Areas >Rectangle >By Dimensions X1, X2 ( 0, 0.5 ) (horiz range) Y1, Y2 ( 1.75, 2 ) [Apply] (vert range) X1, X2 ( 0.75, 1 ) (horiz range) Y1, Y2 ( 0, 1.5 ) (vert range) [PlotCtrls] >Numbering >Area numbers (On) [PlotCtrls] >Pan, Zoom, Rotate > [ • ] (Zoom Out) Create Corner >Modeling >Create >Areas > Rectangle >By Keypoints Pick circle center point: (Click inside window. Hold button down) Move arrow until: WPX = 0, WPY = 0 Click at center, drag until: Radius = 1.0 [WorkPlane] >Offset WP to >Keypoints Pick Keypoints: (lower left and right corners) >Modeling >Create >Areas >Circle >Solid Circle Pick circle center point: (Click inside window. Hold button down) Move arrow until: WPX = 0, WPY = 0 Click at center, drag until: Radius = 1.0 [Save_db] or [File] > Save as: cylinder1.db Create Fillet [PlotCtrls] > Numbering > Line Numbers (On) [WorkPlane] >Display Working Plane (toggle off) >Preprocessor >Modeling >Create >Lines >Line Fillet Pick intersecting lines: (1, 8) (2 lines intersecting at corner) (RAD: 0.4 )  Error Message! “Lines 1 and 8 do not share a common Keypoint” Create a New Line [PlotCtrls] > Numbering > Keypoint Numbers (On) [Plot] > Lines (Note: line numbers are located in center of each line) >Modeling >Create >Lines>Lines >Straight Lines Enter on the Command Line the Keypoints defining the new line (12 CR) ( 8 CR) Create Fillet – (again) >Modeling >Create >Lines >Line Fillet Pick intersecting lines: (17, 8) (2 lines intersecting at corner) (RAD: 0.4 ) Create Fillet Area [Pan, Zoom, Rotate] > [Box Zoom] (Click & drag box to select area around fillet) >Modeling >Create >Areas – Arbitrary> By Lines Pick Lines bounding fillet area (Note: must have 3 lines joining corner & tang pts) ( You may have to create another line segment ) [Pan, Zoom, Rotate] > [Fit] [Plot] > Areas [Save_db] or [File] > Save as: bracket2.db Add Areas – Boolean Operation >Modeling >Operate >Boolean >Add >Areas Pick: areas (Click inside all 5 areas ) Create Holes [WorkPlane] >Display Working Plane >Preprocessor >Modeling >Create >Areas >Circle > Solid Circle Pick center point: (WPX = 0, WPY = 0) (Workplane coordinates) (Rad = .4 ) (Click & drag to size) [WorkPlane] >Offset WP to >Global Origin >Modeling >Create >Areas >Circle > Solid Circle Pick center point: (WPX = 0, WPY = 0) (Workplane coordinates) (Rad = .4 ) (Click & drag to size) [WorkPlane] >Display Working Plane (toggle off) [Plot] > Replot [Plot] > Lines [Save_db] or [File] > Save as: bracket3.db Subtract Holes – Boolean Operation >Modeling > Operate >Boolean >Subtract > Areas Pick: base area: (bracket ) [Apply] Pick: both holes: [File] > Save as: bracket4.db ______Mesh Model Automatic Mesh Generation >Preprocessor >Meshing >Size Controls > Manual Size >Global >Size SIZE (0.5) >Meshing >Mesh > Areas >Free Pick bracket area: Re-do Mesh >Meshing > Clear Pick area (bracket) [Plot] > Areas ( Try different mesh size, etc) ______Solution Apply Boundary Constraints >Solution [Plot] > Lines >Define Loads > Apply >Structural >Displacement >On Keypoints Pick 4 Keypoints around the upper hole DOFs constrained: All DOF Displacement Value: 0 Expand displacement to nodes?: Yes (Applies same constraint to nodes between KP)

Apply Loads >Solution >Define Loads > Apply >Pressure >On Lines Lower Circle: Pick line on lower left quarter circle [Apply] ValueI: (50) ValueJ: (500) [Apply] (Tapered pressure distribution) Pick line on lower right quarter circle[Apply] ValueI: (500) ValueJ: (50) (Reverse pressure distribution) [Save_db] Solve Current Load Set >Solution >Solve >Current LS (Note: Complete results are stored in results file: jobname.rst ) ______Postprocessing Deformed Shape >General Postprocessor >Plot Results >Deformed Shape (Select Deformed and Undeformed Shape)

[PlotCtrls] > Style > Displacement Scaling > (Rescale plot) User Specified (400) Replot Stress Contours >Plot Results >Contour Plot >Nodal Solution Select: (Stress) –Scroll to: ( von Mises) Scale Factor: (blank) (Def shape only) Interpolation Nodes: (Corners only) Eff Nu (0)

Element Plot [PlotCtrls] > Numbering > Elem / Attrib (Element Numbers) Numbers shown with (Colors only) Replot Plot Input Data Meshed model with node numbers Line model with loads and constraints List Results Tables >General Postprocessor >List Results > Nodal Solution, Element Solution, and Reaction Solution (All items ) List input data [List] Nodal coordinates, elements, properties, real constants, loads, constraints [File] >Print or...[File] >Save as: (send to file: jobname.out)

Select "All DOF" (display table of results) [File] >Print lp -d CB230ps or...[File] >Copy to Output File (send to file: jobname.out) >Plot Element Solution ______Other ANSYS Features Dependent Constraints >Preprocessor >Couple / ceqn 0 = -1*4Y + 0.2*4X Angled constraint: at node 4, displ in Y dir. equals 0.2* displ in X dir. (i.e. positive slope) 0 = -1*4X + 1*3X Pin joint: coincident nodes 3 and 4 move together in the 0 = -1*4Y + 1*3Y X and Y dir, but rotate independently Screen Capture [PlotCtrls] >Hard Copy Send to default printer: lp -d CB230ps Print a Table or a Help File [File] >Print (Use File option in the table window) ______ANSYS Help and File Management

Help Help - Table of Contents - Workbook Sample Problems Help - Table of Contents - Procedures Manual Sec. 2.4 Typical ANSYS Analysis Sec. 11.2 General Postprocessor Sec. 12.5 Creating Graphs App. A File Management Help – plane82 (description of 8 node quad elements) Files Look in your ANSYS directory. jobname.db Database file - your ANSYS input data jobname.dbb Backup of database file - created when you do a Save-db jobname.emat Element matrices jobname.err Error/warning log jobname.esav Saved element data jobname.log Command history - complete record of commands used in a session jobname.out ANSYS Output file jobname.rst ANSYS Results file