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Slide1 MEGN 424: Computer Aided Engineering LAB 6 - 2D Truss Analysis with SolidWorks Simulation and Mathcad.

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Presentation on theme: "Slide1 MEGN 424: Computer Aided Engineering LAB 6 - 2D Truss Analysis with SolidWorks Simulation and Mathcad."— Presentation transcript:

1 Slide1 MEGN 424: Computer Aided Engineering LAB 6 - 2D Truss Analysis with SolidWorks Simulation and Mathcad

2 Slide2 Finite Element Analysis Process 1.Create a CAD model (completed in THW 3) 2.Configure and run an FEA study 3.Validate and understand the results

3 Slide3 Define Problem and Create Model 1.Create a CAD model (Completed in THW 3) a.Define the problem to be studied b.Specify units c.Build a CAD model (in SolidWorks)

4 Slide4 2D Truss Structure FEA This system has three truss elements with the geometry shown. The three truss elements have a hollow rectangular x-sectional area of 2.089 in 2 and wall thickness 0.25 in (shown on the right above). Use 1060 Aluminum alloy material The distance and coordinate units are inches. The x-translation is fixed at node 1, and the x- and y-translations are fixed at node 3. The pin at node 2 is subject to an applied downward vertical force of 750 lbf. 750 Figure 1: A Simple 2D Truss Structure (dimensions shown in inches) 2: (48,36) 1: (0,0) 3: (0,36) x y 2 1 3 Figure 2: Weldment profile cross- Section (dimensions in inches)

5 Slide5 CAD model from THW 3 Open SolidWorks (SW), then open YI Truss LAB6.sldprt from c:\scratch\yourinitials

6 Slide6 Configure and run FEA 2.Configure and run an FEA study a.Choose a study type b.Specify units c.Define a mesh type d.Define material e.Define joints for a beam or truss study f.Apply restraints g.Apply loads/pressures h.Define contact sets i.Set meshing options j.Mesh the part or assembly k.Run the analysis l.Create displays of results

7 Slide7 Adding SolidWorks Simulation Open Tools>Add-Ins, Check SolidWorks Simulation, Select OK. You should see Simulation as a new tab in the menu bar. If Soildworks Simulation is already added, skip the next step.

8 Slide8 Adding SolidWorks Simulation Activate the Simulation tab near the top of the viewing area. Select Simulation (or Study Advisor) > New Study > Static. Name the study LAB6 your initials. The software creates the study in the Simulation study tree. Set the units in Simulation>Options>Default Options tab to IPS units.

9 Slide9 Check Results Folders Simulation> Options After saving the file in c:\scratch\your initials choose the SolidWorks document folder. It will automatically use c:\scratch\ your initials

10 Slide10 Check Reports Folders Simulation> Options Select the report folder. It will automatically use c:\scratch\your initials

11 Slide11 Check Results Folder location in the FEA Study This should happen automatically

12 Slide12 Configure – Truss Elements Select the structural members, Right Click Edit Definition Choose Truss and OK

13 Slide13 Configure – Apply Material Right click, Apply Aluminum: 1060 Alloy material to all bodies

14 Slide14 Define joints 2.Configure and run an FEA study a.Choose a study type b.Specify units c.Define a mesh type d.Define material e.Define joints for a beam or truss study f.Apply restraints g.Apply loads/pressures h.Define contact sets i.Set meshing options j.Mesh the part or assembly k.Run the analysis l.Create displays of results

15 Slide15 Define the Joints (nodes) Right click Joint Group

16 Slide16 Apply Restraints 2.Configure and run an FEA study a.Choose a study type b.Specify units c.Define a mesh type d.Define material e.Define joints for a beam or truss study f.Apply restraints g.Apply loads/pressures h.Define contact sets i.Set meshing options j.Mesh the part or assembly k.Run the analysis l.Create displays of results

17 Slide17 Apply Restraints (Fixtures) 750 Figure 1: A Simple 2D Truss System (dimensions shown in inches) 2: (48,36) 1: (0,0) 3: (0,36) x y 2 1 3

18 Slide18 Apply z-Restraints to prevent rigid body motion Select type: reference geom. zero translation to Front (z) Plane (Fixtures)

19 Slide19 Apply x,y-Restraint to upper left Joint Immovable Fixture = all translations fixed

20 Slide20 Apply x-Restraint to lower left Joint

21 Slide21 Check Restraints (Fixtures: Show All) 750 Figure 1: A Simple 2D Truss System (dimensions shown in inches) 2: (48,36) 1: (0,0) 3: (0,36) x y 2 1 3

22 Slide22 Apply loads 2.Configure and run an FEA study a.Choose a study type b.Specify units c.Define a mesh type d.Define material e.Define joints for a beam or truss study f.Apply restraints g.Apply loads h.Define contact sets i.Set meshing options j.Mesh the part or assembly k.Run the analysis l.Create displays of results

23 Slide23 Apply Load

24 Slide24 Run and display results 2.Configure and run an FEA study a.Choose a study type b.Specify units c.Define a mesh type d.Define material e.Define joints for a beam or truss study f.Apply restraints g.Apply loads/pressures h.Run the analysis i.Create displays of results

25 Slide25 Axial Stress Plot with probe values Paste a screen shot of this plot into a MS Word document. See the following slides for further LAB submission information.

26 Slide26 Verify and understand the results 3.Verify and understand the results a.Use Mechanics of Materials (MOM) fundamentals calculations to approximate results b.Verify the results c.Understand the results d.Assess the safety of the design e.Report the results

27 Slide27 Draw a free body diagram 1. Do it on scratch paper. You don’t have to submit it. 2. Choose either compression or tension for each member. 3. Draw the force arrows at the end of each member for either tension or compression. 4. Draw the reaction force arrows at each joint to be equal and opposite from the force arrows at each end of the members. 5. Add symbols, dimensions, and force values. 3 (0, 36) 1 (0,0) 2 (48,36) F = -750 lbf F3F3 F1F1 F2F2 750 2: (48,36) 1: (0,0) 3: (0,36) x y 2 1 3

28 Slide28 Determine Forces in a Mathcad worksheet Determine R 3y from the overall truss FBD Determine internal forces F 1 & F 2 using the method of joints applied to node 2: Determine the internal force F 3 in member 3 using the method of joints: 3 R 3y F3F3 2 F = -750 lbf 3 4 F1F1 F2F2 tension compression

29 Slide29 Determine Stresses in a Mathcad worksheet Compressive stress Tensile stress A = 2.089 in 2

30 Slide30 Submit for LAB 6 1.MS Word file with: 2.Usual header. 3.Screen shot of SWS Axial Stress plot with 3 probe values. 4.Screen shot of your mathcad worksheet that calculates the element internal forces and axial stresses. 5.A comparison of the SWS and Mathcad results. Create a pdf from the MS Word document named Lname_Fname_LAB6.pdf and submit on Blackboard.


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