SolidWorks 2019 CAD Basics And Stress Analysis Content

Pick the flange front surface Sketch Pick: “Line” drop down menu Pick: “Center line” icon Pick flange center hole center point Drag up Pick top end point of this centerline Existing Relations above are Vertical &Coicident1 Add Relations Vertical OK.“Cut” the first bolt hole.Pick: “Smart Dimension” icon Dimension the hole 7/8 inch diameter and 4.750 radius ExitSketch.Pick the bolt diameter circle Insert Cut Extrude OK24

Insert Pattern/Mirror Circular Pattern One flange outer edge “Edge 1 360.00deg Number of holes 8 Features to Pattern Cut-Extrude1 Pick the first bolt hole above left OKCompleted pipeflange part left.Right click on thecenterline in theFeature Tree Clickthe “Hide” icon (eyeglasses) to togglebetween hide andshow.Insert Pattern/Mirror Circular Pattern to obtain the dialog box above left.5 - THIRD PARACTICE PART - SWEEP25

Pipe elbow part is shown above. Pick: Top Plane Sketch Circle tool Pipe inside outsidediameter (Create the pipe inside diameter) Offset Entities .280in Exit Sketch.Pick: Front Plane Sketch the 9.000 inch radius 90 degree arch with 3-Point Circle ExitSketch. Sweep Boss/Base icon Pick Sketch1 Pick Sketch2, in the Features Tree OK.6 - CONCENTRIC PIPE REDUCER – LOFT 24New Part OK 3D Sketch 3.000 Line 5.500 Line 3.000 Line OK26

New Part OK Circle tool 3.000 radius Circle tool 2.000 radius OKInsert Boss/Base Loft Pick 3.000 radius circle profile Pick 2.000 radius circle profile Ctrl Q to exit sketch. Click on Front Plane Insert Reference Geometry Plane7 - BOTTOM UP ASSEMBLIESBottom-up is the traditional method used by CAD operators. Each part is modeled and saved.Then the individual parts are inserted into an assembly using geometric relations to position themin a subassembly or top assembly.Insert saved parts and sub-assemblies into SolidWorks then “mate” adjacent parts or subassemblies together in a final assembly.Any changes to a part will need to be done by editing it individually. This technique is practical tomodel parts already designed and fabricated, like purchased parts and components (nuts, bolts,bearings, motors, pulleys, etc.), in general, parts that are imported, and which do not change theirshape and dimensions.27

8 - TOP DOWN ASSEMBLIESTop-down assemblies where created from parts modeled "inside" the assembly, being related to"driving" entities inside the assembly which control the shape, features, dimensions and positionof those parts, in a way that changes introduced to the "driving" entities "drive" the configurationof all the "in-context" modeled parts and therefore the entire assembly.Top-down modeling makes possible the creation of parametric assemblies systems, which cannotbe done using the Bottom-up technique alone.Creating a properly structured Top-down assembly requires more analysis and work that thecreation of a Bottom-up model, however, the advantage of top-down modeling for people doingproduct design is that very little work (and time) will be required when design changes occur,since all parts and components will automatically update to new shapes, dimensions, position,etc. as new input parameters are entered into the "driving" entities at the assembly level.9 – EXTRUDE DIRECTIONS 1 & 2New Part OK Pick Front Plane Sketch Circle tool 6.000 inch diameter circle OKNote the “Offset Entities” tool to be used below.28

The pipe outside diameter is 6.000 inches.The pipe wall thickness is 0.375 inches.Pick “Offset Entities” tool .375 OKThe concentric circles sketch is named Sketch2 and added to the “Feature Tree” belowThe “Boss/Extrude” dialog box allows extrusion in both directions perpendicular to the profilesketch plane.Extrude Sketch2 6.000 inches right to left and 8.000 inches left to right from the Front Plane.Pick Sketch2 in the Feature Tree shown above Boss Extrude Front Plane D1 6.00in D2 8.00in OK.29

The pipe extruded in two directions is shown above.Pick the front plane in the Features Tree Sketch Pick the line drop-down menu Center LinePick the Origin and drag right to create the horizontal line above Exit Sketch.30

10 - REFERANCE PLANEPick the front plane Insert Reference Geometry PlaneFirst Reference Front PlaneSecond Reference Centerline (Line1@Sketch2) Angle 45.00 deg OKSketch the concentric circles on plane1 by the method described above.31

Boss-Extrude Blind 9.00in OK.Edit front 6.00 inch dimension 9.00 inch32

Click the “Rebuild” tool to stretch the pipe.Completed “Lateral”11 - FIRST ASSEMBLY - PIPE ELBOWBegin the assembly by opening two existing parts “Elbow and pipe 1” in SolidWorks.33

Pick: Start Assembly OK.The “Elbow” and “pipe 1” parts above have been created by the methods described.34

These two existing parts have been previously opened in SolidWorks, “Elbow and pipe 1” andappear automatically in the above “Insert Component” dialog box.If the “Elbow and pipe 1” parts had not been opened, click Browse, locate the file containing theparts, and insert them.Drag one part at a time into the assembly area shown right above.The first part dragged into the assembly area will be “anchored” and not able to be moved orrotated.Insert component Existing Part pipe 1.This is the first component of the assembly and it is anchored. It cannot be moved or rotated.Pick the “Mate” paper clip icon on the Assembly tab Pick outer edge of Pipe end Pick outeredge of Elbow end OK35

Rotate the Elbow 180 degrees relative to the fixed pipe 1 by the method below.Pick pipe “Right Plane” Hold “Ctrl” key Pick elbow “Front Plane” Mate 36

Type “180” deg Green Check OK. The Standard Mates dialog box above will open or:Pick drop down menu: Insert Mate Pick pipe “Right Plane” Hold “Ctrl” key Pick elbow“Front Plane” Type “180” deg Green Check OK.Completed Pipe Sub-AssemblyGeometric “Relations” between parts.37

12 - SECOND ASSEMBLY - PIPE RUNPipe run assembly example is shown above.Note the list of nine parts above right that have been previously created by the methods describedin this course above.Open the nine piping items in the list above or Browse for each part one at a time by:Insert Component Existing Part/Assembly Browse Flange Insert Component Existing Part/Assembly Browse Elbow Having started an assembly click the, “Assembly” tab “Mate” icon Pick the Flange matingcircular surface Pick the Elbow mating circular surface Green Check OK.38

Elbow end surface and Flange end surface have been picked.The geometric “Relations” dialog box of tool icons are shown above right.Click “Mate” Concentric Pick Elbow end inside edge Pick Flange end inside edge OKClick “Mate” Concentric Pick Elbow end outside edge Pick Flange end inside edge Clickthe “Reverse” icon OK39

Insert Mirror Components Pick Mirror Plane Pick flange face Component to Mirror Pickthe top right flange OK Rebuild.Click the “Mate” icon Pick the Flange mating circular surface Pick the Pipe mating circularsurface Green Check OK.Click “Mate” Concentric Pick Pipe end inside edge Pick Flange end inside edge OKInsert Reference Geometry Axis40

Insert Reference Geometry Plane41

“Insert Mate” as described above repeatedly to complete the pipe assembly.42

13 - CREATE AN ASSEMBLY DRAWINGCompleted pipe assembly drawing with bill of materials in an ANSI A size drawing template.43

Open the assembly to be inserted into a 2D drawing.File Open Browse for the folder containing an assembly or part to place in a two dimensionaldrawing.The desired assembly is now open in SolidWorks.File New Drawing OK 44

To open an “A” size drawing template, click drop down menu:File New Drawing OK A (ANSI) Landscape OK.A blank standard ANSI A size template has been opened. Other template sizes are available.A custom template can be created by modifying one of the standard templates and saving it.45

Insert Drawing View Model Click the: Model View tab Model View icon Check “Create multiple views” Pick desired views Green check mark View boxes appear in the drawing above after the above commands are made.46

The Isometric view is not usually dimensioned so choose “No”.The 1st Angle views above inserted by the software need to be changed to 3rd angle.1st angle views have been changed to 3rd angle viewsClick on a view pick an edge of the view box drag view to a new location.47

Right click on “Sheet Format1” pick Sheet Properties click Third Angle in Type of projection.Right click on “Sheet Format1” to edit the title block.Open System Options by right clicking on a view in the drawing.Click on “Display Style” Hidden lines removed.48

Initial title block to be updated.Double click on item to be edited.Drawing title, “Assignment 2-8” has been changed to “Pump Piping”.Right click on “Sheet Format” to exit edit.49

Right click on the bottom right view in the drawing The “Drawing View2” dialog box will open.Click “Use custom scale” Select User Defined Change the scale from 1:48 to 1:32.Pick the top left view and change its scale also.50

The new scale is 1:32 for the Isometric and three 2D views.Tools Options Document Properties ANSINext, click “Units” and select US or Metric.51

ADD DIMENSIONS TO DRAWING VIEWS – METHOD-1Pick the “Line” icon drop down menu triangle Pick “Center Line” Pick the approximate centerof a pipe and it will snap to the exact center drag the center line horizontally or vertically toincrease its length.Pick the “Smart Dimension” icon and add the dimensions shown above.Add all necessary dimensions to each view.52

ADD DIMENSIONS TO DRAWING VIEWS – METHOD-2ADD DIMENSIONS TO DRAWING VIEWS – METHOD-2Pick the drop down menu “Insert” “Model Items” toobtain the box above.Select features in a view and dimensions that were usedto create the part will be inserted by the software.Or check the box, “Import items into all views”.Click desired items under headings: Dimensions,Annotations, Reference Geometry, and Options.Pick the drop down menu “Insert” “Model Items” to obtain the box above.53

Right click the top left view Pick the “Shaded with edges” icon highlighted upper left.The top left view is now “shaded with edges”.54

Make room for the Bill Of Materials, BOM.Remove the view at bottom left.Right click the bottom left view boarder Delete key OK14 - BILL OF MATERIALSPick drop down menu: Insert Tables Bill of Materials Select the isometric or other view File Print Preview PrintPick the top left view again Insert Tables Bill of Materials OKPlace the BOM at a convenient location with the mouse pointer.55

The Bill of Materials has been placed at a convenient location in to the drawing.Add part number balloons automatically. Right click on the top left view Annotations AutoBalloon Style Box OK. The “Balloons” are added to the drawing. Pick a balloon and drag tomove as required for readability.56

The finished dimensioned two view drawing with Isometric view and bill of materials.15 - REVISE DIMENSIONS WITH REBUILDPart dimensions may be edited in the drawing followed by “Rebuild” to update the part andrelated assemblies.Double-Click on dimensions to edit Click outside the edit box to close this command.Click on the “Rebuild” icon shown above to make the change to model dimensions. The drawingand model dimensions will be changed.57

16 - 3D SKETCH AND SWEEP1. Sketch the rectangular block with round corners on the “Top Plane”.Top Plane Sketch1 Center Rectangle 4” x 2” Rebuild.Sketch1 Rebuild Extruded Boss/Base Blind 0.50in OK2. Sketch the “Profile” on the “Right Plane” at a corner of the rectangular block.Plane1 Sketch2 Circle 0.25 dia. Line A Line B Add Dimensions Rebuild 58

Press Ctrl key Select Sketch1 and Sketch2 Features Sweep Boss/Base OK.Sweep Boss/Base is created by SolidWorksLOFTED BOSS-BASE1. Sketch1 Center Rectangle on the “Top Plane”Plane1 Sketch1 Center Rectangle 26.25” x 16.25” Rebuild.2. Create “Plane2” parallel to “Top Plane”Plane1 Sketch2 Center Rectangle 29.50” x 19.38” Rebuild.Loft Sketch1 Sketch2 OK59

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LOFTED BOSS-BASE EXAMPLEProcess Piping ExampleStep-1 Build the Tank and Pump SolidWorks 3D assembly above and save.61

Step-2 Add the 8”x 6” eccentric reducer with flange bolted to the pump suction flange.New Part OK Circle tool 3.000 radius Circle tool 2.000 radius OKInsert Boss/Base Loft Pick 3.000 radius circle profile Pick 2.000 radius circle profile Ctrl Q to exit sketch.Click on Front Plane Insert Reference Geometry Plane62

6 x 4 ECCENTRIC REDUCERCreate a pipe run from the above tank discharge flange to pump suction flange.Step-3 Create the dimensioned drawing above, save and print a hard copy.63

4 Write values of dimensions A, B, and C on the above pump-tank picture.5 Create a “Plane” on the 8” diameter face of the 8”x 6” eccentric reducer.6 Open the 3D assembly and make a 3D Sketch pipe line from the pump suction 8”x 6” eccentricreducer to the tank outlet.Insert 3D Sketch Line tool Pick the 8” diameter center point on the 3D Sketch start plane Drag to form Line C Tab key to change direction Draw line B Tab key to change direction Draw line A terminating at the 8” diameter tank Suction Flange.7 Insert the 6” and 8” Gate Valves.8 Create the 8 inch diameter pipe run, Tank to Pump with the “Sweep” command.64

SOLIDWORKS SWEEP – PIPE RUN1-SWEEP2-EDIT SKETCH3-REBUILD4-DESIGN TREECreating Exploded Views (Assemblies)Insert Exploded View Select one or more parts65

Select a part Drag white ball Drag arrow Repeat for each part Done Click: Check markRight click Collapse Explode17 - FINITE ELEMENT ANALYSIS (FEA)SolidWorks CAD software includes finite element analysis applied to: stress,deflection, fluid flow, and temperature distributions.Open SolidWorks66

Follow the steps below to create the above channel bracket and perform a finite element analysisto determine the stress distribution and deflections due to applied loads.Pick the: Right Plane icon Sketch icon 67

Sketch the above channel shapePick Sketch Line tool Pick the bottom left corner as shown above Sketch the channelprofile one straight line at a time.Smart dim .375 .500 2.000 3.000 Exit Sketch OKAdd thickness (6.00 inches) to the rectangle by extruding it.Select the “Boss-Extrude” icon Blind 6.000 OK68File Save As CHANNEL BRACKET

Create a round “Load Zone” .750 inch diameter on the top surface of the channel.Pick the top surface of the channel Sketch Circle tool Sketch the circle With “Smart Dimension” Add the dimensions shown above.Extrude the .750 inch diameter circle.Pick: Extruded Boss/Base Pick the .750 inch diameter circle Blind 0.125 inch OKCircular “Load Zone” .750 inch diameter.69

Completed PartOpen the add-on Finite Element Analysis software two ways:1. Drop down menu: Tools SimulationXpress. Next add a “Fixture” or anchor Pick left endsurface as shown below OK2. Or: Office Products SolidWorks Simulation (wait a moment for the FEA add-on to open)Pick: “Options” drop down menu System of units English inch-pound-second (IPS) or ISOBoundary Conditions: When a component is isolated for analysis, the way in which thatcomponent is attached to another must be simulated with boundary conditions. In this case, wehave chosen a fixed restraint, which means that every point on the back face of the bracket isprevented from moving in any direction.70

While this seems to be a reasonable assumption, it may not be entirely accurate.If screws are used to attach the bracket to a wall, then the top screws may stretch enough to allowthe top of the bracket to separate from the wall.Also, the wall itself may deflect slightly.The choice of proper boundary conditions to simulate actual constraints is often one of the mostimportant decisions to be made for an analysis.Analysis Type: In a static analysis, we assume that that loads are applied slowly.If loads are applied almost instantaneously, then dynamic effects need to be considered.A linear static analysis assumes that the response of the structure is linear – for example, a 20‐lbload produces stresses and deflections that are exactly twice that of a 10‐lb load.However, if the deflections are relatively large, then the stiffness of the part changes as the partdeflects.In that case, a large‐deflection analysis, in which the load is applied incrementally and thestiffness re‐calculated at every step, may be required.71

Add a fixture Pick the channel left end surface as shown above NextNext Add a Force Pick circular surface as shown above OK Next72

The channel is now fixed at the left end and a 1000 lb load is applied to the Load Zone.Choose Material ASTM A36 Apply Close73

Pick“ASTM A36 Steel” Apply Close Next74

Pick “Run” Run Simulation Run SimulationPick “Results” Play Stop animation view results below.Does the part deform as you expected? Yes, continue 75

Show VonMises stress distribution Show Displacement View “VonMises” resultant stresses.76

Mesh Size: A finer mesh, with more elements, will generally produce more accurate results at theexpense of longer processing time. For simple parts and a relatively fast computer, the longerprocessing time is not significant.However, for complex analyses (such as non‐linear and time dependent analyses), mesh size cansignificantly impact processing time.How many elements are needed for accuracy? Sometimes it is necessary to experiment withdifferent meshes until the results converge to a solution.

1 SolidWorks 2019 CAD Basics and Stress Analysis Content John Andrew, P.E. 6 PDH, 12/5/2019 2410 Dako