Solidworks COSMOS Modeling

8/11/2019 Solidworks COSMOS Modeling

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COSMOS/Works

Version 6.0

Placing a Concentrated Load Using

SolidWorks & COSMOS

Prepared by:Prepared by:Prepared by:Prepared by:Hashim AlHashim AlHashim AlHashim Al----ZainZainZainZain

For:For:For:For:Dr. Max GassmanDr. Max GassmanDr. Max GassmanDr. Max Gassman


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Problem Statement:

Determine the values and locations of three concentrated forces with values of

100Nand 300 Non the ends of the shaft and 400 N at the center of the shaft, where they

are all placed on the surface of the shaft; that is 1 min length and 0.50 min diameter

using COSMOS/Works.

Getting Started:

1. From the Startmenu select Programs/ SolidWorks 2001.

2. Click on File/ Newa dialog box will pop-up.

3. In the new SolidWorks document dialog box, select Part.4. Click OK and a new part file will open. From the pull-down menu, select

Tools/Add-Ins, a dialog box will appear.

5. Select COSMOS/ Worksfrom the Add-Insdialog box and click OK.

6. Save drawing by clicking on File/ Save as and call it Shaft.

Figure 1: Useful tabs & icons

The default units for a new part are metric. If needed, units could be changed to

English from the pull-down menu, select Tools/ Options, and then select the

Document Propertiestab and highlight Units.Change the linear units from metric(millimeters) to inches.

FEA Tab

Feature Manager Tab

COSMOS IconsStandard

Views Icons

Sketch tools

Feature Manager

Tree


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Drawing the Shaft:

1. Select the Frontplane from the feature manager tree by clicking on Front.

2. Select the Sketchicon from the vertical tool bar on the right hand side (RHS) of

the window.3. Select the Circleicon located below the sketch icon (11th

icon from the top).

4. Place the curser on the origin (curser will turn orangeindicating that is has

snapped to the origin).

5. Create a circle by clicking on the origin and depressing the left mouse button thendragging and releasing the mouse button to create a circle with a random radius.

6. To dimension the circle, click on the Dimensiontool located on the sketch tool

bar (4th

from the top).7. Click on the arc of the created circle and drag a suitable position and place the

required dimension (0.50 m).

8. In order to fit the circle in the whole screen, click on the Zoom-To-Fiticon

located at the top toolbar menu (or simply by clicking on the Fbutton on thekeyboard).

9. To create an extruded shape, select the Extrudeicon located on the LHS of the

window; a dialog box will appear right where the model tree is located.10. Using the mouse, select the direction of extrusion (doesnt really matter in this

case) and set the desirable length of the shaft (100 mm) and click on the check

mark (Figure 2). The shaft should look like Figure 3 on the next page.

Figure 2: Boss-Extrusion dialog box

To rotate your drawing, select the Rotateicon from the top toolbar (or suppress

the middle mouse button and move).


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Figure 3: Shaft in isometric view

Creating a Vertex on a Curved Surface:

1. Click on the front face of the model and from the Standard Viewtoolbar (or

Ctrl+1).

If the standard views arent available, right click on the top tool bar and from the pull-down menu select Standard Views.

2. From the model tree, select the top view.3. To offset an existing plane (in this case the Topview), use the mouse and click on

the top view while holding down the Ctrlkey and drag and drop the offset plane

an arbitrary distance.4. By double-clicking on the new offset plane, the distance between the offset plane

and the top plane is displayed. Now double-click on the dimension and insert the

radius of the circle (25 mm) and hit Rebuildlocated on the top toolbar to updateyour drawing.

5. On the model tree, double-click on the offset plane and rename it Offset Plane.

6. Select OF Planeand click normal to from standard views as shown in Figure 4

on the next page.


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Figure 4: Top & Offset plane

7. Open a sketch and select the Lineicon located on the RHS of the window.8. Draw a horizontal line that passes through both boundaries (right & left) of the

shaft as illustrated in Figure 5.

Figure 5: Normal view to the offset plane

9. Go to the top toolbar and click Insert/ Curve/ Split Line. A dialog box willappear. In the dialog box select the Type of Projection, select Projectionthen

click on Next.

10. The next step is to specify the Sketch to Project, select the current sketch (line)

from the drawing, then (in the same dialog box) click on the faces to split area andspecify either sides of the shaft (above or below the created line) and click Finish.

Line created

Offset

Plane


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Split faces should look like Figure 6below.

Figure 6: Faces split

11. Repeat steps 6 through 10, but instead of drawing a horizontal line we draw a

vertical line crossing the boundaries of the upper and lower ends of the shaft.

Your drawing should look like Figure 7.

Figure 7: Faces split four ways

12. Hover around the surface of the shaft, where all four faces intersect. You should

get a ghost image of a vertex as illustrated in Figure 8 on the next page.

Face 1

Face 2


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Figure 8: The vertex where all 4 faces intersect

Finite Element Analysis (FEA) of the Shaft:

1. Choose COSMOSE/Works and select Study from the pull down menu.

2. Click on the Addbutton and enter a name of the study in the New Studydialog

box (Call itShaft Forces).3. In the same dialog box, chooseStatic as the analysis type, andSolid as the Mesh

Type.

4. Click on OK twice to exit the Study and Study Name dialog boxes.5. From the top tool bar, select COSMOS/ Worksand from the pull down menu

choose Insert/ Material.6. With the COSMOS Library tab selected, choose Steelas the Material Type and

Alloy Steelas the Material Name.

7. Click OK to exit the material dialog box.

8. Choose COSMOS/Worksand from the pull down menu select Mesh/Create.

Accept the default Global Size and Tolerance by clicking on the OK button.

9. The program will create the mesh and a dialog box will indicate the completion ofthe mesh. Click OK to return to the drawing window.

10. Click on both flat ends of the shaft by selecting one face and holding down the

Ctrlkey and select the other one.11. From the top toolbar, select COSMOS/Worksand from the pull down menu

select Insert/Restraints, a dialog box will appear.

12. In the dialog boxselect Fixedas the Type, and click OK to exit the Restraints

dialog box as shown in Figure 9 (Next page).13. Select the vertex that has been created on the shaft curved surface and from the

top toolbar, select COSMOS/Worksand from the pull down menu select

Insert/Force, a dialog box will appear.

Vertex

Point


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14. Insert the value of the force acting on the center of the shaft by clicking on the

check mark in the Direction 2area. The value of the force should be 400 N

(Negative sign because its acting downwards) Figure 9.

Figure 9: Placing the restraints & Point load

15. From the Standard Views toolbar, select the bottom view of the shaft (Figure 10).

Figure 10: Bottom view

16. Using the middle mouse button, slightly rotate the shaft side ways in order to

select the bottom vertex, where two of the four faces intersect and avoid selecting

the Originpoint (Figure11).

Bottom

View

Restraints

Point Load

Origin


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If the curser is properly hovering over the desirable vertex, a ghost image will appear

as shown below in Figure 11.

Figure 11: Rotating the shaft & ghost image of vertex

17. Select the vertex where the force will be placed (Figure 12).

Figure 12: Selecting the bottom vertex

18. Repeat steps15 through 17 for the other end of the shaft.

19. Click on one of the vertices and select COSMOS/Worksand from the pull down

menu select Insert/Force, a dialog box will appear.

Ghost

image

ofbottom

vertex

Selected

Vertex


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20. In the dialog box, insert the value of the force acting on that end of the shaft by

clicking on the check mark in the Direction 2area. The value of the force should

be 100 N.21. Repeat steps 17 and 18 for the other end of the shaft with a value of 300 N.

Running FEA:

To run the FEA, select COSMOS/Worksand from the pull down menu select Run.

The Finite Element Analysis will run and as soon as the analysis is done a dialog box

will pop-up indicating that the study has been completed.

Viewing the FEA Plots:

On the FEA model tree, double-click on the Stressesfolder and a plot icon

illuminates. Click on the Ploticon and the window will view the stress distribution on theshaft that is caused by the applied forces (Figure 13).

Figure 13: Stress plot

Figure 14illustrates the displacement in the shaft, and as we can see that there isa slight bending occurring in the shaft.

Stress

concentration

Restraints

Von-Mises

stress

RangeStress

folder

Plot

Icon

FEAmodel

tree


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Figure 14: Displacement plot

Figure 15shows the strains in the shaft and their values.

Figure 15: Strain plot

Strain

Values


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Conclusion:

Congratulations, you have successfully completed the tutorial of placingconcentrated loads on a shaft using and ran FEA using COSMOS/Works.

Solidworks COSMOS Modeling

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